Add extracted source directory and README navigation

extracted-source/node_modules/@modelcontextprotocol/sdk/dist/esm/client/auth.js

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+import pkceChallenge from 'pkce-challenge';
+import { LATEST_PROTOCOL_VERSION } from '../types.js';
+import { OAuthErrorResponseSchema, OpenIdProviderDiscoveryMetadataSchema } from '../shared/auth.js';
+import { OAuthClientInformationFullSchema, OAuthMetadataSchema, OAuthProtectedResourceMetadataSchema, OAuthTokensSchema } from '../shared/auth.js';
+import { checkResourceAllowed, resourceUrlFromServerUrl } from '../shared/auth-utils.js';
+import { InvalidClientError, InvalidClientMetadataError, InvalidGrantError, OAUTH_ERRORS, OAuthError, ServerError, UnauthorizedClientError } from '../server/auth/errors.js';
+export class UnauthorizedError extends Error {
+    constructor(message) {
+        super(message ?? 'Unauthorized');
+    }
+}
+function isClientAuthMethod(method) {
+    return ['client_secret_basic', 'client_secret_post', 'none'].includes(method);
+}
+const AUTHORIZATION_CODE_RESPONSE_TYPE = 'code';
+const AUTHORIZATION_CODE_CHALLENGE_METHOD = 'S256';
+/**
+ * Determines the best client authentication method to use based on server support and client configuration.
+ *
+ * Priority order (highest to lowest):
+ * 1. client_secret_basic (if client secret is available)
+ * 2. client_secret_post (if client secret is available)
+ * 3. none (for public clients)
+ *
+ * @param clientInformation - OAuth client information containing credentials
+ * @param supportedMethods - Authentication methods supported by the authorization server
+ * @returns The selected authentication method
+ */
+export function selectClientAuthMethod(clientInformation, supportedMethods) {
+    const hasClientSecret = clientInformation.client_secret !== undefined;
+    // If server doesn't specify supported methods, use RFC 6749 defaults
+    if (supportedMethods.length === 0) {
+        return hasClientSecret ? 'client_secret_post' : 'none';
+    }
+    // Prefer the method returned by the server during client registration if valid and supported
+    if ('token_endpoint_auth_method' in clientInformation &&
+        clientInformation.token_endpoint_auth_method &&
+        isClientAuthMethod(clientInformation.token_endpoint_auth_method) &&
+        supportedMethods.includes(clientInformation.token_endpoint_auth_method)) {
+        return clientInformation.token_endpoint_auth_method;
+    }
+    // Try methods in priority order (most secure first)
+    if (hasClientSecret && supportedMethods.includes('client_secret_basic')) {
+        return 'client_secret_basic';
+    }
+    if (hasClientSecret && supportedMethods.includes('client_secret_post')) {
+        return 'client_secret_post';
+    }
+    if (supportedMethods.includes('none')) {
+        return 'none';
+    }
+    // Fallback: use what we have
+    return hasClientSecret ? 'client_secret_post' : 'none';
+}
+/**
+ * Applies client authentication to the request based on the specified method.
+ *
+ * Implements OAuth 2.1 client authentication methods:
+ * - client_secret_basic: HTTP Basic authentication (RFC 6749 Section 2.3.1)
+ * - client_secret_post: Credentials in request body (RFC 6749 Section 2.3.1)
+ * - none: Public client authentication (RFC 6749 Section 2.1)
+ *
+ * @param method - The authentication method to use
+ * @param clientInformation - OAuth client information containing credentials
+ * @param headers - HTTP headers object to modify
+ * @param params - URL search parameters to modify
+ * @throws {Error} When required credentials are missing
+ */
+function applyClientAuthentication(method, clientInformation, headers, params) {
+    const { client_id, client_secret } = clientInformation;
+    switch (method) {
+        case 'client_secret_basic':
+            applyBasicAuth(client_id, client_secret, headers);
+            return;
+        case 'client_secret_post':
+            applyPostAuth(client_id, client_secret, params);
+            return;
+        case 'none':
+            applyPublicAuth(client_id, params);
+            return;
+        default:
+            throw new Error(`Unsupported client authentication method: ${method}`);
+    }
+}
+/**
+ * Applies HTTP Basic authentication (RFC 6749 Section 2.3.1)
+ */
+function applyBasicAuth(clientId, clientSecret, headers) {
+    if (!clientSecret) {
+        throw new Error('client_secret_basic authentication requires a client_secret');
+    }
+    const credentials = btoa(`${clientId}:${clientSecret}`);
+    headers.set('Authorization', `Basic ${credentials}`);
+}
+/**
+ * Applies POST body authentication (RFC 6749 Section 2.3.1)
+ */
+function applyPostAuth(clientId, clientSecret, params) {
+    params.set('client_id', clientId);
+    if (clientSecret) {
+        params.set('client_secret', clientSecret);
+    }
+}
+/**
+ * Applies public client authentication (RFC 6749 Section 2.1)
+ */
+function applyPublicAuth(clientId, params) {
+    params.set('client_id', clientId);
+}
+/**
+ * Parses an OAuth error response from a string or Response object.
+ *
+ * If the input is a standard OAuth2.0 error response, it will be parsed according to the spec
+ * and an instance of the appropriate OAuthError subclass will be returned.
+ * If parsing fails, it falls back to a generic ServerError that includes
+ * the response status (if available) and original content.
+ *
+ * @param input - A Response object or string containing the error response
+ * @returns A Promise that resolves to an OAuthError instance
+ */
+export async function parseErrorResponse(input) {
+    const statusCode = input instanceof Response ? input.status : undefined;
+    const body = input instanceof Response ? await input.text() : input;
+    try {
+        const result = OAuthErrorResponseSchema.parse(JSON.parse(body));
+        const { error, error_description, error_uri } = result;
+        const errorClass = OAUTH_ERRORS[error] || ServerError;
+        return new errorClass(error_description || '', error_uri);
+    }
+    catch (error) {
+        // Not a valid OAuth error response, but try to inform the user of the raw data anyway
+        const errorMessage = `${statusCode ? `HTTP ${statusCode}: ` : ''}Invalid OAuth error response: ${error}. Raw body: ${body}`;
+        return new ServerError(errorMessage);
+    }
+}
+/**
+ * Orchestrates the full auth flow with a server.
+ *
+ * This can be used as a single entry point for all authorization functionality,
+ * instead of linking together the other lower-level functions in this module.
+ */
+export async function auth(provider, options) {
+    try {
+        return await authInternal(provider, options);
+    }
+    catch (error) {
+        // Handle recoverable error types by invalidating credentials and retrying
+        if (error instanceof InvalidClientError || error instanceof UnauthorizedClientError) {
+            await provider.invalidateCredentials?.('all');
+            return await authInternal(provider, options);
+        }
+        else if (error instanceof InvalidGrantError) {
+            await provider.invalidateCredentials?.('tokens');
+            return await authInternal(provider, options);
+        }
+        // Throw otherwise
+        throw error;
+    }
+}
+async function authInternal(provider, { serverUrl, authorizationCode, scope, resourceMetadataUrl, fetchFn }) {
+    // Check if the provider has cached discovery state to skip discovery
+    const cachedState = await provider.discoveryState?.();
+    let resourceMetadata;
+    let authorizationServerUrl;
+    let metadata;
+    // If resourceMetadataUrl is not provided, try to load it from cached state
+    // This handles browser redirects where the URL was saved before navigation
+    let effectiveResourceMetadataUrl = resourceMetadataUrl;
+    if (!effectiveResourceMetadataUrl && cachedState?.resourceMetadataUrl) {
+        effectiveResourceMetadataUrl = new URL(cachedState.resourceMetadataUrl);
+    }
+    if (cachedState?.authorizationServerUrl) {
+        // Restore discovery state from cache
+        authorizationServerUrl = cachedState.authorizationServerUrl;
+        resourceMetadata = cachedState.resourceMetadata;
+        metadata =
+            cachedState.authorizationServerMetadata ?? (await discoverAuthorizationServerMetadata(authorizationServerUrl, { fetchFn }));
+        // If resource metadata wasn't cached, try to fetch it for selectResourceURL
+        if (!resourceMetadata) {
+            try {
+                resourceMetadata = await discoverOAuthProtectedResourceMetadata(serverUrl, { resourceMetadataUrl: effectiveResourceMetadataUrl }, fetchFn);
+            }
+            catch {
+                // RFC 9728 not available — selectResourceURL will handle undefined
+            }
+        }
+        // Re-save if we enriched the cached state with missing metadata
+        if (metadata !== cachedState.authorizationServerMetadata || resourceMetadata !== cachedState.resourceMetadata) {
+            await provider.saveDiscoveryState?.({
+                authorizationServerUrl: String(authorizationServerUrl),
+                resourceMetadataUrl: effectiveResourceMetadataUrl?.toString(),
+                resourceMetadata,
+                authorizationServerMetadata: metadata
+            });
+        }
+    }
+    else {
+        // Full discovery via RFC 9728
+        const serverInfo = await discoverOAuthServerInfo(serverUrl, { resourceMetadataUrl: effectiveResourceMetadataUrl, fetchFn });
+        authorizationServerUrl = serverInfo.authorizationServerUrl;
+        metadata = serverInfo.authorizationServerMetadata;
+        resourceMetadata = serverInfo.resourceMetadata;
+        // Persist discovery state for future use
+        // TODO: resourceMetadataUrl is only populated when explicitly provided via options
+        // or loaded from cached state. The URL derived internally by
+        // discoverOAuthProtectedResourceMetadata() is not captured back here.
+        await provider.saveDiscoveryState?.({
+            authorizationServerUrl: String(authorizationServerUrl),
+            resourceMetadataUrl: effectiveResourceMetadataUrl?.toString(),
+            resourceMetadata,
+            authorizationServerMetadata: metadata
+        });
+    }
+    const resource = await selectResourceURL(serverUrl, provider, resourceMetadata);
+    // Handle client registration if needed
+    let clientInformation = await Promise.resolve(provider.clientInformation());
+    if (!clientInformation) {
+        if (authorizationCode !== undefined) {
+            throw new Error('Existing OAuth client information is required when exchanging an authorization code');
+        }
+        const supportsUrlBasedClientId = metadata?.client_id_metadata_document_supported === true;
+        const clientMetadataUrl = provider.clientMetadataUrl;
+        if (clientMetadataUrl && !isHttpsUrl(clientMetadataUrl)) {
+            throw new InvalidClientMetadataError(`clientMetadataUrl must be a valid HTTPS URL with a non-root pathname, got: ${clientMetadataUrl}`);
+        }
+        const shouldUseUrlBasedClientId = supportsUrlBasedClientId && clientMetadataUrl;
+        if (shouldUseUrlBasedClientId) {
+            // SEP-991: URL-based Client IDs
+            clientInformation = {
+                client_id: clientMetadataUrl
+            };
+            await provider.saveClientInformation?.(clientInformation);
+        }
+        else {
+            // Fallback to dynamic registration
+            if (!provider.saveClientInformation) {
+                throw new Error('OAuth client information must be saveable for dynamic registration');
+            }
+            const fullInformation = await registerClient(authorizationServerUrl, {
+                metadata,
+                clientMetadata: provider.clientMetadata,
+                fetchFn
+            });
+            await provider.saveClientInformation(fullInformation);
+            clientInformation = fullInformation;
+        }
+    }
+    // Non-interactive flows (e.g., client_credentials, jwt-bearer) don't need a redirect URL
+    const nonInteractiveFlow = !provider.redirectUrl;
+    // Exchange authorization code for tokens, or fetch tokens directly for non-interactive flows
+    if (authorizationCode !== undefined || nonInteractiveFlow) {
+        const tokens = await fetchToken(provider, authorizationServerUrl, {
+            metadata,
+            resource,
+            authorizationCode,
+            fetchFn
+        });
+        await provider.saveTokens(tokens);
+        return 'AUTHORIZED';
+    }
+    const tokens = await provider.tokens();
+    // Handle token refresh or new authorization
+    if (tokens?.refresh_token) {
+        try {
+            // Attempt to refresh the token
+            const newTokens = await refreshAuthorization(authorizationServerUrl, {
+                metadata,
+                clientInformation,
+                refreshToken: tokens.refresh_token,
+                resource,
+                addClientAuthentication: provider.addClientAuthentication,
+                fetchFn
+            });
+            await provider.saveTokens(newTokens);
+            return 'AUTHORIZED';
+        }
+        catch (error) {
+            // If this is a ServerError, or an unknown type, log it out and try to continue. Otherwise, escalate so we can fix things and retry.
+            if (!(error instanceof OAuthError) || error instanceof ServerError) {
+                // Could not refresh OAuth tokens
+            }
+            else {
+                // Refresh failed for another reason, re-throw
+                throw error;
+            }
+        }
+    }
+    const state = provider.state ? await provider.state() : undefined;
+    // Start new authorization flow
+    const { authorizationUrl, codeVerifier } = await startAuthorization(authorizationServerUrl, {
+        metadata,
+        clientInformation,
+        state,
+        redirectUrl: provider.redirectUrl,
+        scope: scope || resourceMetadata?.scopes_supported?.join(' ') || provider.clientMetadata.scope,
+        resource
+    });
+    await provider.saveCodeVerifier(codeVerifier);
+    await provider.redirectToAuthorization(authorizationUrl);
+    return 'REDIRECT';
+}
+/**
+ * SEP-991: URL-based Client IDs
+ * Validate that the client_id is a valid URL with https scheme
+ */
+export function isHttpsUrl(value) {
+    if (!value)
+        return false;
+    try {
+        const url = new URL(value);
+        return url.protocol === 'https:' && url.pathname !== '/';
+    }
+    catch {
+        return false;
+    }
+}
+export async function selectResourceURL(serverUrl, provider, resourceMetadata) {
+    const defaultResource = resourceUrlFromServerUrl(serverUrl);
+    // If provider has custom validation, delegate to it
+    if (provider.validateResourceURL) {
+        return await provider.validateResourceURL(defaultResource, resourceMetadata?.resource);
+    }
+    // Only include resource parameter when Protected Resource Metadata is present
+    if (!resourceMetadata) {
+        return undefined;
+    }
+    // Validate that the metadata's resource is compatible with our request
+    if (!checkResourceAllowed({ requestedResource: defaultResource, configuredResource: resourceMetadata.resource })) {
+        throw new Error(`Protected resource ${resourceMetadata.resource} does not match expected ${defaultResource} (or origin)`);
+    }
+    // Prefer the resource from metadata since it's what the server is telling us to request
+    return new URL(resourceMetadata.resource);
+}
+/**
+ * Extract resource_metadata, scope, and error from WWW-Authenticate header.
+ */
+export function extractWWWAuthenticateParams(res) {
+    const authenticateHeader = res.headers.get('WWW-Authenticate');
+    if (!authenticateHeader) {
+        return {};
+    }
+    const [type, scheme] = authenticateHeader.split(' ');
+    if (type.toLowerCase() !== 'bearer' || !scheme) {
+        return {};
+    }
+    const resourceMetadataMatch = extractFieldFromWwwAuth(res, 'resource_metadata') || undefined;
+    let resourceMetadataUrl;
+    if (resourceMetadataMatch) {
+        try {
+            resourceMetadataUrl = new URL(resourceMetadataMatch);
+        }
+        catch {
+            // Ignore invalid URL
+        }
+    }
+    const scope = extractFieldFromWwwAuth(res, 'scope') || undefined;
+    const error = extractFieldFromWwwAuth(res, 'error') || undefined;
+    return {
+        resourceMetadataUrl,
+        scope,
+        error
+    };
+}
+/**
+ * Extracts a specific field's value from the WWW-Authenticate header string.
+ *
+ * @param response The HTTP response object containing the headers.
+ * @param fieldName The name of the field to extract (e.g., "realm", "nonce").
+ * @returns The field value
+ */
+function extractFieldFromWwwAuth(response, fieldName) {
+    const wwwAuthHeader = response.headers.get('WWW-Authenticate');
+    if (!wwwAuthHeader) {
+        return null;
+    }
+    const pattern = new RegExp(`${fieldName}=(?:"([^"]+)"|([^\\s,]+))`);
+    const match = wwwAuthHeader.match(pattern);
+    if (match) {
+        // Pattern matches: field_name="value" or field_name=value (unquoted)
+        return match[1] || match[2];
+    }
+    return null;
+}
+/**
+ * Extract resource_metadata from response header.
+ * @deprecated Use `extractWWWAuthenticateParams` instead.
+ */
+export function extractResourceMetadataUrl(res) {
+    const authenticateHeader = res.headers.get('WWW-Authenticate');
+    if (!authenticateHeader) {
+        return undefined;
+    }
+    const [type, scheme] = authenticateHeader.split(' ');
+    if (type.toLowerCase() !== 'bearer' || !scheme) {
+        return undefined;
+    }
+    const regex = /resource_metadata="([^"]*)"/;
+    const match = regex.exec(authenticateHeader);
+    if (!match) {
+        return undefined;
+    }
+    try {
+        return new URL(match[1]);
+    }
+    catch {
+        return undefined;
+    }
+}
+/**
+ * Looks up RFC 9728 OAuth 2.0 Protected Resource Metadata.
+ *
+ * If the server returns a 404 for the well-known endpoint, this function will
+ * return `undefined`. Any other errors will be thrown as exceptions.
+ */
+export async function discoverOAuthProtectedResourceMetadata(serverUrl, opts, fetchFn = fetch) {
+    const response = await discoverMetadataWithFallback(serverUrl, 'oauth-protected-resource', fetchFn, {
+        protocolVersion: opts?.protocolVersion,
+        metadataUrl: opts?.resourceMetadataUrl
+    });
+    if (!response || response.status === 404) {
+        await response?.body?.cancel();
+        throw new Error(`Resource server does not implement OAuth 2.0 Protected Resource Metadata.`);
+    }
+    if (!response.ok) {
+        await response.body?.cancel();
+        throw new Error(`HTTP ${response.status} trying to load well-known OAuth protected resource metadata.`);
+    }
+    return OAuthProtectedResourceMetadataSchema.parse(await response.json());
+}
+/**
+ * Helper function to handle fetch with CORS retry logic
+ */
+async function fetchWithCorsRetry(url, headers, fetchFn = fetch) {
+    try {
+        return await fetchFn(url, { headers });
+    }
+    catch (error) {
+        if (error instanceof TypeError) {
+            if (headers) {
+                // CORS errors come back as TypeError, retry without headers
+                return fetchWithCorsRetry(url, undefined, fetchFn);
+            }
+            else {
+                // We're getting CORS errors on retry too, return undefined
+                return undefined;
+            }
+        }
+        throw error;
+    }
+}
+/**
+ * Constructs the well-known path for auth-related metadata discovery
+ */
+function buildWellKnownPath(wellKnownPrefix, pathname = '', options = {}) {
+    // Strip trailing slash from pathname to avoid double slashes
+    if (pathname.endsWith('/')) {
+        pathname = pathname.slice(0, -1);
+    }
+    return options.prependPathname ? `${pathname}/.well-known/${wellKnownPrefix}` : `/.well-known/${wellKnownPrefix}${pathname}`;
+}
+/**
+ * Tries to discover OAuth metadata at a specific URL
+ */
+async function tryMetadataDiscovery(url, protocolVersion, fetchFn = fetch) {
+    const headers = {
+        'MCP-Protocol-Version': protocolVersion
+    };
+    return await fetchWithCorsRetry(url, headers, fetchFn);
+}
+/**
+ * Determines if fallback to root discovery should be attempted
+ */
+function shouldAttemptFallback(response, pathname) {
+    return !response || (response.status >= 400 && response.status < 500 && pathname !== '/');
+}
+/**
+ * Generic function for discovering OAuth metadata with fallback support
+ */
+async function discoverMetadataWithFallback(serverUrl, wellKnownType, fetchFn, opts) {
+    const issuer = new URL(serverUrl);
+    const protocolVersion = opts?.protocolVersion ?? LATEST_PROTOCOL_VERSION;
+    let url;
+    if (opts?.metadataUrl) {
+        url = new URL(opts.metadataUrl);
+    }
+    else {
+        // Try path-aware discovery first
+        const wellKnownPath = buildWellKnownPath(wellKnownType, issuer.pathname);
+        url = new URL(wellKnownPath, opts?.metadataServerUrl ?? issuer);
+        url.search = issuer.search;
+    }
+    let response = await tryMetadataDiscovery(url, protocolVersion, fetchFn);
+    // If path-aware discovery fails with 404 and we're not already at root, try fallback to root discovery
+    if (!opts?.metadataUrl && shouldAttemptFallback(response, issuer.pathname)) {
+        const rootUrl = new URL(`/.well-known/${wellKnownType}`, issuer);
+        response = await tryMetadataDiscovery(rootUrl, protocolVersion, fetchFn);
+    }
+    return response;
+}
+/**
+ * Looks up RFC 8414 OAuth 2.0 Authorization Server Metadata.
+ *
+ * If the server returns a 404 for the well-known endpoint, this function will
+ * return `undefined`. Any other errors will be thrown as exceptions.
+ *
+ * @deprecated This function is deprecated in favor of `discoverAuthorizationServerMetadata`.
+ */
+export async function discoverOAuthMetadata(issuer, { authorizationServerUrl, protocolVersion } = {}, fetchFn = fetch) {
+    if (typeof issuer === 'string') {
+        issuer = new URL(issuer);
+    }
+    if (!authorizationServerUrl) {
+        authorizationServerUrl = issuer;
+    }
+    if (typeof authorizationServerUrl === 'string') {
+        authorizationServerUrl = new URL(authorizationServerUrl);
+    }
+    protocolVersion ?? (protocolVersion = LATEST_PROTOCOL_VERSION);
+    const response = await discoverMetadataWithFallback(authorizationServerUrl, 'oauth-authorization-server', fetchFn, {
+        protocolVersion,
+        metadataServerUrl: authorizationServerUrl
+    });
+    if (!response || response.status === 404) {
+        await response?.body?.cancel();
+        return undefined;
+    }
+    if (!response.ok) {
+        await response.body?.cancel();
+        throw new Error(`HTTP ${response.status} trying to load well-known OAuth metadata`);
+    }
+    return OAuthMetadataSchema.parse(await response.json());
+}
+/**
+ * Builds a list of discovery URLs to try for authorization server metadata.
+ * URLs are returned in priority order:
+ * 1. OAuth metadata at the given URL
+ * 2. OIDC metadata endpoints at the given URL
+ */
+export function buildDiscoveryUrls(authorizationServerUrl) {
+    const url = typeof authorizationServerUrl === 'string' ? new URL(authorizationServerUrl) : authorizationServerUrl;
+    const hasPath = url.pathname !== '/';
+    const urlsToTry = [];
+    if (!hasPath) {
+        // Root path: https://example.com/.well-known/oauth-authorization-server
+        urlsToTry.push({
+            url: new URL('/.well-known/oauth-authorization-server', url.origin),
+            type: 'oauth'
+        });
+        // OIDC: https://example.com/.well-known/openid-configuration
+        urlsToTry.push({
+            url: new URL(`/.well-known/openid-configuration`, url.origin),
+            type: 'oidc'
+        });
+        return urlsToTry;
+    }
+    // Strip trailing slash from pathname to avoid double slashes
+    let pathname = url.pathname;
+    if (pathname.endsWith('/')) {
+        pathname = pathname.slice(0, -1);
+    }
+    // 1. OAuth metadata at the given URL
+    // Insert well-known before the path: https://example.com/.well-known/oauth-authorization-server/tenant1
+    urlsToTry.push({
+        url: new URL(`/.well-known/oauth-authorization-server${pathname}`, url.origin),
+        type: 'oauth'
+    });
+    // 2. OIDC metadata endpoints
+    // RFC 8414 style: Insert /.well-known/openid-configuration before the path
+    urlsToTry.push({
+        url: new URL(`/.well-known/openid-configuration${pathname}`, url.origin),
+        type: 'oidc'
+    });
+    // OIDC Discovery 1.0 style: Append /.well-known/openid-configuration after the path
+    urlsToTry.push({
+        url: new URL(`${pathname}/.well-known/openid-configuration`, url.origin),
+        type: 'oidc'
+    });
+    return urlsToTry;
+}
+/**
+ * Discovers authorization server metadata with support for RFC 8414 OAuth 2.0 Authorization Server Metadata
+ * and OpenID Connect Discovery 1.0 specifications.
+ *
+ * This function implements a fallback strategy for authorization server discovery:
+ * 1. Attempts RFC 8414 OAuth metadata discovery first
+ * 2. If OAuth discovery fails, falls back to OpenID Connect Discovery
+ *
+ * @param authorizationServerUrl - The authorization server URL obtained from the MCP Server's
+ *                                 protected resource metadata, or the MCP server's URL if the
+ *                                 metadata was not found.
+ * @param options - Configuration options
+ * @param options.fetchFn - Optional fetch function for making HTTP requests, defaults to global fetch
+ * @param options.protocolVersion - MCP protocol version to use, defaults to LATEST_PROTOCOL_VERSION
+ * @returns Promise resolving to authorization server metadata, or undefined if discovery fails
+ */
+export async function discoverAuthorizationServerMetadata(authorizationServerUrl, { fetchFn = fetch, protocolVersion = LATEST_PROTOCOL_VERSION } = {}) {
+    const headers = {
+        'MCP-Protocol-Version': protocolVersion,
+        Accept: 'application/json'
+    };
+    // Get the list of URLs to try
+    const urlsToTry = buildDiscoveryUrls(authorizationServerUrl);
+    // Try each URL in order
+    for (const { url: endpointUrl, type } of urlsToTry) {
+        const response = await fetchWithCorsRetry(endpointUrl, headers, fetchFn);
+        if (!response) {
+            /**
+             * CORS error occurred - don't throw as the endpoint may not allow CORS,
+             * continue trying other possible endpoints
+             */
+            continue;
+        }
+        if (!response.ok) {
+            await response.body?.cancel();
+            // Continue looking for any 4xx response code.
+            if (response.status >= 400 && response.status < 500) {
+                continue; // Try next URL
+            }
+            throw new Error(`HTTP ${response.status} trying to load ${type === 'oauth' ? 'OAuth' : 'OpenID provider'} metadata from ${endpointUrl}`);
+        }
+        // Parse and validate based on type
+        if (type === 'oauth') {
+            return OAuthMetadataSchema.parse(await response.json());
+        }
+        else {
+            return OpenIdProviderDiscoveryMetadataSchema.parse(await response.json());
+        }
+    }
+    return undefined;
+}
+/**
+ * Discovers the authorization server for an MCP server following
+ * {@link https://datatracker.ietf.org/doc/html/rfc9728 | RFC 9728} (OAuth 2.0 Protected
+ * Resource Metadata), with fallback to treating the server URL as the
+ * authorization server.
+ *
+ * This function combines two discovery steps into one call:
+ * 1. Probes `/.well-known/oauth-protected-resource` on the MCP server to find the
+ *    authorization server URL (RFC 9728).
+ * 2. Fetches authorization server metadata from that URL (RFC 8414 / OpenID Connect Discovery).
+ *
+ * Use this when you need the authorization server metadata for operations outside the
+ * {@linkcode auth} orchestrator, such as token refresh or token revocation.
+ *
+ * @param serverUrl - The MCP resource server URL
+ * @param opts - Optional configuration
+ * @param opts.resourceMetadataUrl - Override URL for the protected resource metadata endpoint
+ * @param opts.fetchFn - Custom fetch function for HTTP requests
+ * @returns Authorization server URL, metadata, and resource metadata (if available)
+ */
+export async function discoverOAuthServerInfo(serverUrl, opts) {
+    let resourceMetadata;
+    let authorizationServerUrl;
+    try {
+        resourceMetadata = await discoverOAuthProtectedResourceMetadata(serverUrl, { resourceMetadataUrl: opts?.resourceMetadataUrl }, opts?.fetchFn);
+        if (resourceMetadata.authorization_servers && resourceMetadata.authorization_servers.length > 0) {
+            authorizationServerUrl = resourceMetadata.authorization_servers[0];
+        }
+    }
+    catch {
+        // RFC 9728 not supported -- fall back to treating the server URL as the authorization server
+    }
+    // If we don't get a valid authorization server from protected resource metadata,
+    // fall back to the legacy MCP spec behavior: MCP server base URL acts as the authorization server
+    if (!authorizationServerUrl) {
+        authorizationServerUrl = String(new URL('/', serverUrl));
+    }
+    const authorizationServerMetadata = await discoverAuthorizationServerMetadata(authorizationServerUrl, { fetchFn: opts?.fetchFn });
+    return {
+        authorizationServerUrl,
+        authorizationServerMetadata,
+        resourceMetadata
+    };
+}
+/**
+ * Begins the authorization flow with the given server, by generating a PKCE challenge and constructing the authorization URL.
+ */
+export async function startAuthorization(authorizationServerUrl, { metadata, clientInformation, redirectUrl, scope, state, resource }) {
+    let authorizationUrl;
+    if (metadata) {
+        authorizationUrl = new URL(metadata.authorization_endpoint);
+        if (!metadata.response_types_supported.includes(AUTHORIZATION_CODE_RESPONSE_TYPE)) {
+            throw new Error(`Incompatible auth server: does not support response type ${AUTHORIZATION_CODE_RESPONSE_TYPE}`);
+        }
+        if (metadata.code_challenge_methods_supported &&
+            !metadata.code_challenge_methods_supported.includes(AUTHORIZATION_CODE_CHALLENGE_METHOD)) {
+            throw new Error(`Incompatible auth server: does not support code challenge method ${AUTHORIZATION_CODE_CHALLENGE_METHOD}`);
+        }
+    }
+    else {
+        authorizationUrl = new URL('/authorize', authorizationServerUrl);
+    }
+    // Generate PKCE challenge
+    const challenge = await pkceChallenge();
+    const codeVerifier = challenge.code_verifier;
+    const codeChallenge = challenge.code_challenge;
+    authorizationUrl.searchParams.set('response_type', AUTHORIZATION_CODE_RESPONSE_TYPE);
+    authorizationUrl.searchParams.set('client_id', clientInformation.client_id);
+    authorizationUrl.searchParams.set('code_challenge', codeChallenge);
+    authorizationUrl.searchParams.set('code_challenge_method', AUTHORIZATION_CODE_CHALLENGE_METHOD);
+    authorizationUrl.searchParams.set('redirect_uri', String(redirectUrl));
+    if (state) {
+        authorizationUrl.searchParams.set('state', state);
+    }
+    if (scope) {
+        authorizationUrl.searchParams.set('scope', scope);
+    }
+    if (scope?.includes('offline_access')) {
+        // if the request includes the OIDC-only "offline_access" scope,
+        // we need to set the prompt to "consent" to ensure the user is prompted to grant offline access
+        // https://openid.net/specs/openid-connect-core-1_0.html#OfflineAccess
+        authorizationUrl.searchParams.append('prompt', 'consent');
+    }
+    if (resource) {
+        authorizationUrl.searchParams.set('resource', resource.href);
+    }
+    return { authorizationUrl, codeVerifier };
+}
+/**
+ * Prepares token request parameters for an authorization code exchange.
+ *
+ * This is the default implementation used by fetchToken when the provider
+ * doesn't implement prepareTokenRequest.
+ *
+ * @param authorizationCode - The authorization code received from the authorization endpoint
+ * @param codeVerifier - The PKCE code verifier
+ * @param redirectUri - The redirect URI used in the authorization request
+ * @returns URLSearchParams for the authorization_code grant
+ */
+export function prepareAuthorizationCodeRequest(authorizationCode, codeVerifier, redirectUri) {
+    return new URLSearchParams({
+        grant_type: 'authorization_code',
+        code: authorizationCode,
+        code_verifier: codeVerifier,
+        redirect_uri: String(redirectUri)
+    });
+}
+/**
+ * Internal helper to execute a token request with the given parameters.
+ * Used by exchangeAuthorization, refreshAuthorization, and fetchToken.
+ */
+async function executeTokenRequest(authorizationServerUrl, { metadata, tokenRequestParams, clientInformation, addClientAuthentication, resource, fetchFn }) {
+    const tokenUrl = metadata?.token_endpoint ? new URL(metadata.token_endpoint) : new URL('/token', authorizationServerUrl);
+    const headers = new Headers({
+        'Content-Type': 'application/x-www-form-urlencoded',
+        Accept: 'application/json'
+    });
+    if (resource) {
+        tokenRequestParams.set('resource', resource.href);
+    }
+    if (addClientAuthentication) {
+        await addClientAuthentication(headers, tokenRequestParams, tokenUrl, metadata);
+    }
+    else if (clientInformation) {
+        const supportedMethods = metadata?.token_endpoint_auth_methods_supported ?? [];
+        const authMethod = selectClientAuthMethod(clientInformation, supportedMethods);
+        applyClientAuthentication(authMethod, clientInformation, headers, tokenRequestParams);
+    }
+    const response = await (fetchFn ?? fetch)(tokenUrl, {
+        method: 'POST',
+        headers,
+        body: tokenRequestParams
+    });
+    if (!response.ok) {
+        throw await parseErrorResponse(response);
+    }
+    return OAuthTokensSchema.parse(await response.json());
+}
+/**
+ * Exchanges an authorization code for an access token with the given server.
+ *
+ * Supports multiple client authentication methods as specified in OAuth 2.1:
+ * - Automatically selects the best authentication method based on server support
+ * - Falls back to appropriate defaults when server metadata is unavailable
+ *
+ * @param authorizationServerUrl - The authorization server's base URL
+ * @param options - Configuration object containing client info, auth code, etc.
+ * @returns Promise resolving to OAuth tokens
+ * @throws {Error} When token exchange fails or authentication is invalid
+ */
+export async function exchangeAuthorization(authorizationServerUrl, { metadata, clientInformation, authorizationCode, codeVerifier, redirectUri, resource, addClientAuthentication, fetchFn }) {
+    const tokenRequestParams = prepareAuthorizationCodeRequest(authorizationCode, codeVerifier, redirectUri);
+    return executeTokenRequest(authorizationServerUrl, {
+        metadata,
+        tokenRequestParams,
+        clientInformation,
+        addClientAuthentication,
+        resource,
+        fetchFn
+    });
+}
+/**
+ * Exchange a refresh token for an updated access token.
+ *
+ * Supports multiple client authentication methods as specified in OAuth 2.1:
+ * - Automatically selects the best authentication method based on server support
+ * - Preserves the original refresh token if a new one is not returned
+ *
+ * @param authorizationServerUrl - The authorization server's base URL
+ * @param options - Configuration object containing client info, refresh token, etc.
+ * @returns Promise resolving to OAuth tokens (preserves original refresh_token if not replaced)
+ * @throws {Error} When token refresh fails or authentication is invalid
+ */
+export async function refreshAuthorization(authorizationServerUrl, { metadata, clientInformation, refreshToken, resource, addClientAuthentication, fetchFn }) {
+    const tokenRequestParams = new URLSearchParams({
+        grant_type: 'refresh_token',
+        refresh_token: refreshToken
+    });
+    const tokens = await executeTokenRequest(authorizationServerUrl, {
+        metadata,
+        tokenRequestParams,
+        clientInformation,
+        addClientAuthentication,
+        resource,
+        fetchFn
+    });
+    // Preserve original refresh token if server didn't return a new one
+    return { refresh_token: refreshToken, ...tokens };
+}
+/**
+ * Unified token fetching that works with any grant type via provider.prepareTokenRequest().
+ *
+ * This function provides a single entry point for obtaining tokens regardless of the
+ * OAuth grant type. The provider's prepareTokenRequest() method determines which grant
+ * to use and supplies the grant-specific parameters.
+ *
+ * @param provider - OAuth client provider that implements prepareTokenRequest()
+ * @param authorizationServerUrl - The authorization server's base URL
+ * @param options - Configuration for the token request
+ * @returns Promise resolving to OAuth tokens
+ * @throws {Error} When provider doesn't implement prepareTokenRequest or token fetch fails
+ *
+ * @example
+ * // Provider for client_credentials:
+ * class MyProvider implements OAuthClientProvider {
+ *   prepareTokenRequest(scope) {
+ *     const params = new URLSearchParams({ grant_type: 'client_credentials' });
+ *     if (scope) params.set('scope', scope);
+ *     return params;
+ *   }
+ *   // ... other methods
+ * }
+ *
+ * const tokens = await fetchToken(provider, authServerUrl, { metadata });
+ */
+export async function fetchToken(provider, authorizationServerUrl, { metadata, resource, authorizationCode, fetchFn } = {}) {
+    const scope = provider.clientMetadata.scope;
+    // Use provider's prepareTokenRequest if available, otherwise fall back to authorization_code
+    let tokenRequestParams;
+    if (provider.prepareTokenRequest) {
+        tokenRequestParams = await provider.prepareTokenRequest(scope);
+    }
+    // Default to authorization_code grant if no custom prepareTokenRequest
+    if (!tokenRequestParams) {
+        if (!authorizationCode) {
+            throw new Error('Either provider.prepareTokenRequest() or authorizationCode is required');
+        }
+        if (!provider.redirectUrl) {
+            throw new Error('redirectUrl is required for authorization_code flow');
+        }
+        const codeVerifier = await provider.codeVerifier();
+        tokenRequestParams = prepareAuthorizationCodeRequest(authorizationCode, codeVerifier, provider.redirectUrl);
+    }
+    const clientInformation = await provider.clientInformation();
+    return executeTokenRequest(authorizationServerUrl, {
+        metadata,
+        tokenRequestParams,
+        clientInformation: clientInformation ?? undefined,
+        addClientAuthentication: provider.addClientAuthentication,
+        resource,
+        fetchFn
+    });
+}
+/**
+ * Performs OAuth 2.0 Dynamic Client Registration according to RFC 7591.
+ */
+export async function registerClient(authorizationServerUrl, { metadata, clientMetadata, fetchFn }) {
+    let registrationUrl;
+    if (metadata) {
+        if (!metadata.registration_endpoint) {
+            throw new Error('Incompatible auth server: does not support dynamic client registration');
+        }
+        registrationUrl = new URL(metadata.registration_endpoint);
+    }
+    else {
+        registrationUrl = new URL('/register', authorizationServerUrl);
+    }
+    const response = await (fetchFn ?? fetch)(registrationUrl, {
+        method: 'POST',
+        headers: {
+            'Content-Type': 'application/json'
+        },
+        body: JSON.stringify(clientMetadata)
+    });
+    if (!response.ok) {
+        throw await parseErrorResponse(response);
+    }
+    return OAuthClientInformationFullSchema.parse(await response.json());
+}
+//# sourceMappingURL=auth.js.map

extracted-source/node_modules/@modelcontextprotocol/sdk/dist/esm/client/index.js

@@ -0,0 +1,624 @@
+import { mergeCapabilities, Protocol } from '../shared/protocol.js';
+import { CallToolResultSchema, CompleteResultSchema, EmptyResultSchema, ErrorCode, GetPromptResultSchema, InitializeResultSchema, LATEST_PROTOCOL_VERSION, ListPromptsResultSchema, ListResourcesResultSchema, ListResourceTemplatesResultSchema, ListToolsResultSchema, McpError, ReadResourceResultSchema, SUPPORTED_PROTOCOL_VERSIONS, ElicitResultSchema, ElicitRequestSchema, CreateTaskResultSchema, CreateMessageRequestSchema, CreateMessageResultSchema, CreateMessageResultWithToolsSchema, ToolListChangedNotificationSchema, PromptListChangedNotificationSchema, ResourceListChangedNotificationSchema, ListChangedOptionsBaseSchema } from '../types.js';
+import { AjvJsonSchemaValidator } from '../validation/ajv-provider.js';
+import { getObjectShape, isZ4Schema, safeParse } from '../server/zod-compat.js';
+import { ExperimentalClientTasks } from '../experimental/tasks/client.js';
+import { assertToolsCallTaskCapability, assertClientRequestTaskCapability } from '../experimental/tasks/helpers.js';
+/**
+ * Elicitation default application helper. Applies defaults to the data based on the schema.
+ *
+ * @param schema - The schema to apply defaults to.
+ * @param data - The data to apply defaults to.
+ */
+function applyElicitationDefaults(schema, data) {
+    if (!schema || data === null || typeof data !== 'object')
+        return;
+    // Handle object properties
+    if (schema.type === 'object' && schema.properties && typeof schema.properties === 'object') {
+        const obj = data;
+        const props = schema.properties;
+        for (const key of Object.keys(props)) {
+            const propSchema = props[key];
+            // If missing or explicitly undefined, apply default if present
+            if (obj[key] === undefined && Object.prototype.hasOwnProperty.call(propSchema, 'default')) {
+                obj[key] = propSchema.default;
+            }
+            // Recurse into existing nested objects/arrays
+            if (obj[key] !== undefined) {
+                applyElicitationDefaults(propSchema, obj[key]);
+            }
+        }
+    }
+    if (Array.isArray(schema.anyOf)) {
+        for (const sub of schema.anyOf) {
+            // Skip boolean schemas (true/false are valid JSON Schemas but have no defaults)
+            if (typeof sub !== 'boolean') {
+                applyElicitationDefaults(sub, data);
+            }
+        }
+    }
+    // Combine schemas
+    if (Array.isArray(schema.oneOf)) {
+        for (const sub of schema.oneOf) {
+            // Skip boolean schemas (true/false are valid JSON Schemas but have no defaults)
+            if (typeof sub !== 'boolean') {
+                applyElicitationDefaults(sub, data);
+            }
+        }
+    }
+}
+/**
+ * Determines which elicitation modes are supported based on declared client capabilities.
+ *
+ * According to the spec:
+ * - An empty elicitation capability object defaults to form mode support (backwards compatibility)
+ * - URL mode is only supported if explicitly declared
+ *
+ * @param capabilities - The client's elicitation capabilities
+ * @returns An object indicating which modes are supported
+ */
+export function getSupportedElicitationModes(capabilities) {
+    if (!capabilities) {
+        return { supportsFormMode: false, supportsUrlMode: false };
+    }
+    const hasFormCapability = capabilities.form !== undefined;
+    const hasUrlCapability = capabilities.url !== undefined;
+    // If neither form nor url are explicitly declared, form mode is supported (backwards compatibility)
+    const supportsFormMode = hasFormCapability || (!hasFormCapability && !hasUrlCapability);
+    const supportsUrlMode = hasUrlCapability;
+    return { supportsFormMode, supportsUrlMode };
+}
+/**
+ * An MCP client on top of a pluggable transport.
+ *
+ * The client will automatically begin the initialization flow with the server when connect() is called.
+ *
+ * To use with custom types, extend the base Request/Notification/Result types and pass them as type parameters:
+ *
+ * ```typescript
+ * // Custom schemas
+ * const CustomRequestSchema = RequestSchema.extend({...})
+ * const CustomNotificationSchema = NotificationSchema.extend({...})
+ * const CustomResultSchema = ResultSchema.extend({...})
+ *
+ * // Type aliases
+ * type CustomRequest = z.infer<typeof CustomRequestSchema>
+ * type CustomNotification = z.infer<typeof CustomNotificationSchema>
+ * type CustomResult = z.infer<typeof CustomResultSchema>
+ *
+ * // Create typed client
+ * const client = new Client<CustomRequest, CustomNotification, CustomResult>({
+ *   name: "CustomClient",
+ *   version: "1.0.0"
+ * })
+ * ```
+ */
+export class Client extends Protocol {
+    /**
+     * Initializes this client with the given name and version information.
+     */
+    constructor(_clientInfo, options) {
+        super(options);
+        this._clientInfo = _clientInfo;
+        this._cachedToolOutputValidators = new Map();
+        this._cachedKnownTaskTools = new Set();
+        this._cachedRequiredTaskTools = new Set();
+        this._listChangedDebounceTimers = new Map();
+        this._capabilities = options?.capabilities ?? {};
+        this._jsonSchemaValidator = options?.jsonSchemaValidator ?? new AjvJsonSchemaValidator();
+        // Store list changed config for setup after connection (when we know server capabilities)
+        if (options?.listChanged) {
+            this._pendingListChangedConfig = options.listChanged;
+        }
+    }
+    /**
+     * Set up handlers for list changed notifications based on config and server capabilities.
+     * This should only be called after initialization when server capabilities are known.
+     * Handlers are silently skipped if the server doesn't advertise the corresponding listChanged capability.
+     * @internal
+     */
+    _setupListChangedHandlers(config) {
+        if (config.tools && this._serverCapabilities?.tools?.listChanged) {
+            this._setupListChangedHandler('tools', ToolListChangedNotificationSchema, config.tools, async () => {
+                const result = await this.listTools();
+                return result.tools;
+            });
+        }
+        if (config.prompts && this._serverCapabilities?.prompts?.listChanged) {
+            this._setupListChangedHandler('prompts', PromptListChangedNotificationSchema, config.prompts, async () => {
+                const result = await this.listPrompts();
+                return result.prompts;
+            });
+        }
+        if (config.resources && this._serverCapabilities?.resources?.listChanged) {
+            this._setupListChangedHandler('resources', ResourceListChangedNotificationSchema, config.resources, async () => {
+                const result = await this.listResources();
+                return result.resources;
+            });
+        }
+    }
+    /**
+     * Access experimental features.
+     *
+     * WARNING: These APIs are experimental and may change without notice.
+     *
+     * @experimental
+     */
+    get experimental() {
+        if (!this._experimental) {
+            this._experimental = {
+                tasks: new ExperimentalClientTasks(this)
+            };
+        }
+        return this._experimental;
+    }
+    /**
+     * Registers new capabilities. This can only be called before connecting to a transport.
+     *
+     * The new capabilities will be merged with any existing capabilities previously given (e.g., at initialization).
+     */
+    registerCapabilities(capabilities) {
+        if (this.transport) {
+            throw new Error('Cannot register capabilities after connecting to transport');
+        }
+        this._capabilities = mergeCapabilities(this._capabilities, capabilities);
+    }
+    /**
+     * Override request handler registration to enforce client-side validation for elicitation.
+     */
+    setRequestHandler(requestSchema, handler) {
+        const shape = getObjectShape(requestSchema);
+        const methodSchema = shape?.method;
+        if (!methodSchema) {
+            throw new Error('Schema is missing a method literal');
+        }
+        // Extract literal value using type-safe property access
+        let methodValue;
+        if (isZ4Schema(methodSchema)) {
+            const v4Schema = methodSchema;
+            const v4Def = v4Schema._zod?.def;
+            methodValue = v4Def?.value ?? v4Schema.value;
+        }
+        else {
+            const v3Schema = methodSchema;
+            const legacyDef = v3Schema._def;
+            methodValue = legacyDef?.value ?? v3Schema.value;
+        }
+        if (typeof methodValue !== 'string') {
+            throw new Error('Schema method literal must be a string');
+        }
+        const method = methodValue;
+        if (method === 'elicitation/create') {
+            const wrappedHandler = async (request, extra) => {
+                const validatedRequest = safeParse(ElicitRequestSchema, request);
+                if (!validatedRequest.success) {
+                    // Type guard: if success is false, error is guaranteed to exist
+                    const errorMessage = validatedRequest.error instanceof Error ? validatedRequest.error.message : String(validatedRequest.error);
+                    throw new McpError(ErrorCode.InvalidParams, `Invalid elicitation request: ${errorMessage}`);
+                }
+                const { params } = validatedRequest.data;
+                params.mode = params.mode ?? 'form';
+                const { supportsFormMode, supportsUrlMode } = getSupportedElicitationModes(this._capabilities.elicitation);
+                if (params.mode === 'form' && !supportsFormMode) {
+                    throw new McpError(ErrorCode.InvalidParams, 'Client does not support form-mode elicitation requests');
+                }
+                if (params.mode === 'url' && !supportsUrlMode) {
+                    throw new McpError(ErrorCode.InvalidParams, 'Client does not support URL-mode elicitation requests');
+                }
+                const result = await Promise.resolve(handler(request, extra));
+                // When task creation is requested, validate and return CreateTaskResult
+                if (params.task) {
+                    const taskValidationResult = safeParse(CreateTaskResultSchema, result);
+                    if (!taskValidationResult.success) {
+                        const errorMessage = taskValidationResult.error instanceof Error
+                            ? taskValidationResult.error.message
+                            : String(taskValidationResult.error);
+                        throw new McpError(ErrorCode.InvalidParams, `Invalid task creation result: ${errorMessage}`);
+                    }
+                    return taskValidationResult.data;
+                }
+                // For non-task requests, validate against ElicitResultSchema
+                const validationResult = safeParse(ElicitResultSchema, result);
+                if (!validationResult.success) {
+                    // Type guard: if success is false, error is guaranteed to exist
+                    const errorMessage = validationResult.error instanceof Error ? validationResult.error.message : String(validationResult.error);
+                    throw new McpError(ErrorCode.InvalidParams, `Invalid elicitation result: ${errorMessage}`);
+                }
+                const validatedResult = validationResult.data;
+                const requestedSchema = params.mode === 'form' ? params.requestedSchema : undefined;
+                if (params.mode === 'form' && validatedResult.action === 'accept' && validatedResult.content && requestedSchema) {
+                    if (this._capabilities.elicitation?.form?.applyDefaults) {
+                        try {
+                            applyElicitationDefaults(requestedSchema, validatedResult.content);
+                        }
+                        catch {
+                            // gracefully ignore errors in default application
+                        }
+                    }
+                }
+                return validatedResult;
+            };
+            // Install the wrapped handler
+            return super.setRequestHandler(requestSchema, wrappedHandler);
+        }
+        if (method === 'sampling/createMessage') {
+            const wrappedHandler = async (request, extra) => {
+                const validatedRequest = safeParse(CreateMessageRequestSchema, request);
+                if (!validatedRequest.success) {
+                    const errorMessage = validatedRequest.error instanceof Error ? validatedRequest.error.message : String(validatedRequest.error);
+                    throw new McpError(ErrorCode.InvalidParams, `Invalid sampling request: ${errorMessage}`);
+                }
+                const { params } = validatedRequest.data;
+                const result = await Promise.resolve(handler(request, extra));
+                // When task creation is requested, validate and return CreateTaskResult
+                if (params.task) {
+                    const taskValidationResult = safeParse(CreateTaskResultSchema, result);
+                    if (!taskValidationResult.success) {
+                        const errorMessage = taskValidationResult.error instanceof Error
+                            ? taskValidationResult.error.message
+                            : String(taskValidationResult.error);
+                        throw new McpError(ErrorCode.InvalidParams, `Invalid task creation result: ${errorMessage}`);
+                    }
+                    return taskValidationResult.data;
+                }
+                // For non-task requests, validate against appropriate schema based on tools presence
+                const hasTools = params.tools || params.toolChoice;
+                const resultSchema = hasTools ? CreateMessageResultWithToolsSchema : CreateMessageResultSchema;
+                const validationResult = safeParse(resultSchema, result);
+                if (!validationResult.success) {
+                    const errorMessage = validationResult.error instanceof Error ? validationResult.error.message : String(validationResult.error);
+                    throw new McpError(ErrorCode.InvalidParams, `Invalid sampling result: ${errorMessage}`);
+                }
+                return validationResult.data;
+            };
+            // Install the wrapped handler
+            return super.setRequestHandler(requestSchema, wrappedHandler);
+        }
+        // Other handlers use default behavior
+        return super.setRequestHandler(requestSchema, handler);
+    }
+    assertCapability(capability, method) {
+        if (!this._serverCapabilities?.[capability]) {
+            throw new Error(`Server does not support ${capability} (required for ${method})`);
+        }
+    }
+    async connect(transport, options) {
+        await super.connect(transport);
+        // When transport sessionId is already set this means we are trying to reconnect.
+        // In this case we don't need to initialize again.
+        if (transport.sessionId !== undefined) {
+            return;
+        }
+        try {
+            const result = await this.request({
+                method: 'initialize',
+                params: {
+                    protocolVersion: LATEST_PROTOCOL_VERSION,
+                    capabilities: this._capabilities,
+                    clientInfo: this._clientInfo
+                }
+            }, InitializeResultSchema, options);
+            if (result === undefined) {
+                throw new Error(`Server sent invalid initialize result: ${result}`);
+            }
+            if (!SUPPORTED_PROTOCOL_VERSIONS.includes(result.protocolVersion)) {
+                throw new Error(`Server's protocol version is not supported: ${result.protocolVersion}`);
+            }
+            this._serverCapabilities = result.capabilities;
+            this._serverVersion = result.serverInfo;
+            // HTTP transports must set the protocol version in each header after initialization.
+            if (transport.setProtocolVersion) {
+                transport.setProtocolVersion(result.protocolVersion);
+            }
+            this._instructions = result.instructions;
+            await this.notification({
+                method: 'notifications/initialized'
+            });
+            // Set up list changed handlers now that we know server capabilities
+            if (this._pendingListChangedConfig) {
+                this._setupListChangedHandlers(this._pendingListChangedConfig);
+                this._pendingListChangedConfig = undefined;
+            }
+        }
+        catch (error) {
+            // Disconnect if initialization fails.
+            void this.close();
+            throw error;
+        }
+    }
+    /**
+     * After initialization has completed, this will be populated with the server's reported capabilities.
+     */
+    getServerCapabilities() {
+        return this._serverCapabilities;
+    }
+    /**
+     * After initialization has completed, this will be populated with information about the server's name and version.
+     */
+    getServerVersion() {
+        return this._serverVersion;
+    }
+    /**
+     * After initialization has completed, this may be populated with information about the server's instructions.
+     */
+    getInstructions() {
+        return this._instructions;
+    }
+    assertCapabilityForMethod(method) {
+        switch (method) {
+            case 'logging/setLevel':
+                if (!this._serverCapabilities?.logging) {
+                    throw new Error(`Server does not support logging (required for ${method})`);
+                }
+                break;
+            case 'prompts/get':
+            case 'prompts/list':
+                if (!this._serverCapabilities?.prompts) {
+                    throw new Error(`Server does not support prompts (required for ${method})`);
+                }
+                break;
+            case 'resources/list':
+            case 'resources/templates/list':
+            case 'resources/read':
+            case 'resources/subscribe':
+            case 'resources/unsubscribe':
+                if (!this._serverCapabilities?.resources) {
+                    throw new Error(`Server does not support resources (required for ${method})`);
+                }
+                if (method === 'resources/subscribe' && !this._serverCapabilities.resources.subscribe) {
+                    throw new Error(`Server does not support resource subscriptions (required for ${method})`);
+                }
+                break;
+            case 'tools/call':
+            case 'tools/list':
+                if (!this._serverCapabilities?.tools) {
+                    throw new Error(`Server does not support tools (required for ${method})`);
+                }
+                break;
+            case 'completion/complete':
+                if (!this._serverCapabilities?.completions) {
+                    throw new Error(`Server does not support completions (required for ${method})`);
+                }
+                break;
+            case 'initialize':
+                // No specific capability required for initialize
+                break;
+            case 'ping':
+                // No specific capability required for ping
+                break;
+        }
+    }
+    assertNotificationCapability(method) {
+        switch (method) {
+            case 'notifications/roots/list_changed':
+                if (!this._capabilities.roots?.listChanged) {
+                    throw new Error(`Client does not support roots list changed notifications (required for ${method})`);
+                }
+                break;
+            case 'notifications/initialized':
+                // No specific capability required for initialized
+                break;
+            case 'notifications/cancelled':
+                // Cancellation notifications are always allowed
+                break;
+            case 'notifications/progress':
+                // Progress notifications are always allowed
+                break;
+        }
+    }
+    assertRequestHandlerCapability(method) {
+        // Task handlers are registered in Protocol constructor before _capabilities is initialized
+        // Skip capability check for task methods during initialization
+        if (!this._capabilities) {
+            return;
+        }
+        switch (method) {
+            case 'sampling/createMessage':
+                if (!this._capabilities.sampling) {
+                    throw new Error(`Client does not support sampling capability (required for ${method})`);
+                }
+                break;
+            case 'elicitation/create':
+                if (!this._capabilities.elicitation) {
+                    throw new Error(`Client does not support elicitation capability (required for ${method})`);
+                }
+                break;
+            case 'roots/list':
+                if (!this._capabilities.roots) {
+                    throw new Error(`Client does not support roots capability (required for ${method})`);
+                }
+                break;
+            case 'tasks/get':
+            case 'tasks/list':
+            case 'tasks/result':
+            case 'tasks/cancel':
+                if (!this._capabilities.tasks) {
+                    throw new Error(`Client does not support tasks capability (required for ${method})`);
+                }
+                break;
+            case 'ping':
+                // No specific capability required for ping
+                break;
+        }
+    }
+    assertTaskCapability(method) {
+        assertToolsCallTaskCapability(this._serverCapabilities?.tasks?.requests, method, 'Server');
+    }
+    assertTaskHandlerCapability(method) {
+        // Task handlers are registered in Protocol constructor before _capabilities is initialized
+        // Skip capability check for task methods during initialization
+        if (!this._capabilities) {
+            return;
+        }
+        assertClientRequestTaskCapability(this._capabilities.tasks?.requests, method, 'Client');
+    }
+    async ping(options) {
+        return this.request({ method: 'ping' }, EmptyResultSchema, options);
+    }
+    async complete(params, options) {
+        return this.request({ method: 'completion/complete', params }, CompleteResultSchema, options);
+    }
+    async setLoggingLevel(level, options) {
+        return this.request({ method: 'logging/setLevel', params: { level } }, EmptyResultSchema, options);
+    }
+    async getPrompt(params, options) {
+        return this.request({ method: 'prompts/get', params }, GetPromptResultSchema, options);
+    }
+    async listPrompts(params, options) {
+        return this.request({ method: 'prompts/list', params }, ListPromptsResultSchema, options);
+    }
+    async listResources(params, options) {
+        return this.request({ method: 'resources/list', params }, ListResourcesResultSchema, options);
+    }
+    async listResourceTemplates(params, options) {
+        return this.request({ method: 'resources/templates/list', params }, ListResourceTemplatesResultSchema, options);
+    }
+    async readResource(params, options) {
+        return this.request({ method: 'resources/read', params }, ReadResourceResultSchema, options);
+    }
+    async subscribeResource(params, options) {
+        return this.request({ method: 'resources/subscribe', params }, EmptyResultSchema, options);
+    }
+    async unsubscribeResource(params, options) {
+        return this.request({ method: 'resources/unsubscribe', params }, EmptyResultSchema, options);
+    }
+    /**
+     * Calls a tool and waits for the result. Automatically validates structured output if the tool has an outputSchema.
+     *
+     * For task-based execution with streaming behavior, use client.experimental.tasks.callToolStream() instead.
+     */
+    async callTool(params, resultSchema = CallToolResultSchema, options) {
+        // Guard: required-task tools need experimental API
+        if (this.isToolTaskRequired(params.name)) {
+            throw new McpError(ErrorCode.InvalidRequest, `Tool "${params.name}" requires task-based execution. Use client.experimental.tasks.callToolStream() instead.`);
+        }
+        const result = await this.request({ method: 'tools/call', params }, resultSchema, options);
+        // Check if the tool has an outputSchema
+        const validator = this.getToolOutputValidator(params.name);
+        if (validator) {
+            // If tool has outputSchema, it MUST return structuredContent (unless it's an error)
+            if (!result.structuredContent && !result.isError) {
+                throw new McpError(ErrorCode.InvalidRequest, `Tool ${params.name} has an output schema but did not return structured content`);
+            }
+            // Only validate structured content if present (not when there's an error)
+            if (result.structuredContent) {
+                try {
+                    // Validate the structured content against the schema
+                    const validationResult = validator(result.structuredContent);
+                    if (!validationResult.valid) {
+                        throw new McpError(ErrorCode.InvalidParams, `Structured content does not match the tool's output schema: ${validationResult.errorMessage}`);
+                    }
+                }
+                catch (error) {
+                    if (error instanceof McpError) {
+                        throw error;
+                    }
+                    throw new McpError(ErrorCode.InvalidParams, `Failed to validate structured content: ${error instanceof Error ? error.message : String(error)}`);
+                }
+            }
+        }
+        return result;
+    }
+    isToolTask(toolName) {
+        if (!this._serverCapabilities?.tasks?.requests?.tools?.call) {
+            return false;
+        }
+        return this._cachedKnownTaskTools.has(toolName);
+    }
+    /**
+     * Check if a tool requires task-based execution.
+     * Unlike isToolTask which includes 'optional' tools, this only checks for 'required'.
+     */
+    isToolTaskRequired(toolName) {
+        return this._cachedRequiredTaskTools.has(toolName);
+    }
+    /**
+     * Cache validators for tool output schemas.
+     * Called after listTools() to pre-compile validators for better performance.
+     */
+    cacheToolMetadata(tools) {
+        this._cachedToolOutputValidators.clear();
+        this._cachedKnownTaskTools.clear();
+        this._cachedRequiredTaskTools.clear();
+        for (const tool of tools) {
+            // If the tool has an outputSchema, create and cache the validator
+            if (tool.outputSchema) {
+                const toolValidator = this._jsonSchemaValidator.getValidator(tool.outputSchema);
+                this._cachedToolOutputValidators.set(tool.name, toolValidator);
+            }
+            // If the tool supports task-based execution, cache that information
+            const taskSupport = tool.execution?.taskSupport;
+            if (taskSupport === 'required' || taskSupport === 'optional') {
+                this._cachedKnownTaskTools.add(tool.name);
+            }
+            if (taskSupport === 'required') {
+                this._cachedRequiredTaskTools.add(tool.name);
+            }
+        }
+    }
+    /**
+     * Get cached validator for a tool
+     */
+    getToolOutputValidator(toolName) {
+        return this._cachedToolOutputValidators.get(toolName);
+    }
+    async listTools(params, options) {
+        const result = await this.request({ method: 'tools/list', params }, ListToolsResultSchema, options);
+        // Cache the tools and their output schemas for future validation
+        this.cacheToolMetadata(result.tools);
+        return result;
+    }
+    /**
+     * Set up a single list changed handler.
+     * @internal
+     */
+    _setupListChangedHandler(listType, notificationSchema, options, fetcher) {
+        // Validate options using Zod schema (validates autoRefresh and debounceMs)
+        const parseResult = ListChangedOptionsBaseSchema.safeParse(options);
+        if (!parseResult.success) {
+            throw new Error(`Invalid ${listType} listChanged options: ${parseResult.error.message}`);
+        }
+        // Validate callback
+        if (typeof options.onChanged !== 'function') {
+            throw new Error(`Invalid ${listType} listChanged options: onChanged must be a function`);
+        }
+        const { autoRefresh, debounceMs } = parseResult.data;
+        const { onChanged } = options;
+        const refresh = async () => {
+            if (!autoRefresh) {
+                onChanged(null, null);
+                return;
+            }
+            try {
+                const items = await fetcher();
+                onChanged(null, items);
+            }
+            catch (e) {
+                const error = e instanceof Error ? e : new Error(String(e));
+                onChanged(error, null);
+            }
+        };
+        const handler = () => {
+            if (debounceMs) {
+                // Clear any pending debounce timer for this list type
+                const existingTimer = this._listChangedDebounceTimers.get(listType);
+                if (existingTimer) {
+                    clearTimeout(existingTimer);
+                }
+                // Set up debounced refresh
+                const timer = setTimeout(refresh, debounceMs);
+                this._listChangedDebounceTimers.set(listType, timer);
+            }
+            else {
+                // No debounce, refresh immediately
+                refresh();
+            }
+        };
+        // Register notification handler
+        this.setNotificationHandler(notificationSchema, handler);
+    }
+    async sendRootsListChanged() {
+        return this.notification({ method: 'notifications/roots/list_changed' });
+    }
+}
+//# sourceMappingURL=index.js.map

extracted-source/node_modules/@modelcontextprotocol/sdk/dist/esm/client/sse.js

@@ -0,0 +1,206 @@
+import { EventSource } from 'eventsource';
+import { createFetchWithInit, normalizeHeaders } from '../shared/transport.js';
+import { JSONRPCMessageSchema } from '../types.js';
+import { auth, extractWWWAuthenticateParams, UnauthorizedError } from './auth.js';
+export class SseError extends Error {
+    constructor(code, message, event) {
+        super(`SSE error: ${message}`);
+        this.code = code;
+        this.event = event;
+    }
+}
+/**
+ * Client transport for SSE: this will connect to a server using Server-Sent Events for receiving
+ * messages and make separate POST requests for sending messages.
+ * @deprecated SSEClientTransport is deprecated. Prefer to use StreamableHTTPClientTransport where possible instead. Note that because some servers are still using SSE, clients may need to support both transports during the migration period.
+ */
+export class SSEClientTransport {
+    constructor(url, opts) {
+        this._url = url;
+        this._resourceMetadataUrl = undefined;
+        this._scope = undefined;
+        this._eventSourceInit = opts?.eventSourceInit;
+        this._requestInit = opts?.requestInit;
+        this._authProvider = opts?.authProvider;
+        this._fetch = opts?.fetch;
+        this._fetchWithInit = createFetchWithInit(opts?.fetch, opts?.requestInit);
+    }
+    async _authThenStart() {
+        if (!this._authProvider) {
+            throw new UnauthorizedError('No auth provider');
+        }
+        let result;
+        try {
+            result = await auth(this._authProvider, {
+                serverUrl: this._url,
+                resourceMetadataUrl: this._resourceMetadataUrl,
+                scope: this._scope,
+                fetchFn: this._fetchWithInit
+            });
+        }
+        catch (error) {
+            this.onerror?.(error);
+            throw error;
+        }
+        if (result !== 'AUTHORIZED') {
+            throw new UnauthorizedError();
+        }
+        return await this._startOrAuth();
+    }
+    async _commonHeaders() {
+        const headers = {};
+        if (this._authProvider) {
+            const tokens = await this._authProvider.tokens();
+            if (tokens) {
+                headers['Authorization'] = `Bearer ${tokens.access_token}`;
+            }
+        }
+        if (this._protocolVersion) {
+            headers['mcp-protocol-version'] = this._protocolVersion;
+        }
+        const extraHeaders = normalizeHeaders(this._requestInit?.headers);
+        return new Headers({
+            ...headers,
+            ...extraHeaders
+        });
+    }
+    _startOrAuth() {
+        const fetchImpl = (this?._eventSourceInit?.fetch ?? this._fetch ?? fetch);
+        return new Promise((resolve, reject) => {
+            this._eventSource = new EventSource(this._url.href, {
+                ...this._eventSourceInit,
+                fetch: async (url, init) => {
+                    const headers = await this._commonHeaders();
+                    headers.set('Accept', 'text/event-stream');
+                    const response = await fetchImpl(url, {
+                        ...init,
+                        headers
+                    });
+                    if (response.status === 401 && response.headers.has('www-authenticate')) {
+                        const { resourceMetadataUrl, scope } = extractWWWAuthenticateParams(response);
+                        this._resourceMetadataUrl = resourceMetadataUrl;
+                        this._scope = scope;
+                    }
+                    return response;
+                }
+            });
+            this._abortController = new AbortController();
+            this._eventSource.onerror = event => {
+                if (event.code === 401 && this._authProvider) {
+                    this._authThenStart().then(resolve, reject);
+                    return;
+                }
+                const error = new SseError(event.code, event.message, event);
+                reject(error);
+                this.onerror?.(error);
+            };
+            this._eventSource.onopen = () => {
+                // The connection is open, but we need to wait for the endpoint to be received.
+            };
+            this._eventSource.addEventListener('endpoint', (event) => {
+                const messageEvent = event;
+                try {
+                    this._endpoint = new URL(messageEvent.data, this._url);
+                    if (this._endpoint.origin !== this._url.origin) {
+                        throw new Error(`Endpoint origin does not match connection origin: ${this._endpoint.origin}`);
+                    }
+                }
+                catch (error) {
+                    reject(error);
+                    this.onerror?.(error);
+                    void this.close();
+                    return;
+                }
+                resolve();
+            });
+            this._eventSource.onmessage = (event) => {
+                const messageEvent = event;
+                let message;
+                try {
+                    message = JSONRPCMessageSchema.parse(JSON.parse(messageEvent.data));
+                }
+                catch (error) {
+                    this.onerror?.(error);
+                    return;
+                }
+                this.onmessage?.(message);
+            };
+        });
+    }
+    async start() {
+        if (this._eventSource) {
+            throw new Error('SSEClientTransport already started! If using Client class, note that connect() calls start() automatically.');
+        }
+        return await this._startOrAuth();
+    }
+    /**
+     * Call this method after the user has finished authorizing via their user agent and is redirected back to the MCP client application. This will exchange the authorization code for an access token, enabling the next connection attempt to successfully auth.
+     */
+    async finishAuth(authorizationCode) {
+        if (!this._authProvider) {
+            throw new UnauthorizedError('No auth provider');
+        }
+        const result = await auth(this._authProvider, {
+            serverUrl: this._url,
+            authorizationCode,
+            resourceMetadataUrl: this._resourceMetadataUrl,
+            scope: this._scope,
+            fetchFn: this._fetchWithInit
+        });
+        if (result !== 'AUTHORIZED') {
+            throw new UnauthorizedError('Failed to authorize');
+        }
+    }
+    async close() {
+        this._abortController?.abort();
+        this._eventSource?.close();
+        this.onclose?.();
+    }
+    async send(message) {
+        if (!this._endpoint) {
+            throw new Error('Not connected');
+        }
+        try {
+            const headers = await this._commonHeaders();
+            headers.set('content-type', 'application/json');
+            const init = {
+                ...this._requestInit,
+                method: 'POST',
+                headers,
+                body: JSON.stringify(message),
+                signal: this._abortController?.signal
+            };
+            const response = await (this._fetch ?? fetch)(this._endpoint, init);
+            if (!response.ok) {
+                const text = await response.text().catch(() => null);
+                if (response.status === 401 && this._authProvider) {
+                    const { resourceMetadataUrl, scope } = extractWWWAuthenticateParams(response);
+                    this._resourceMetadataUrl = resourceMetadataUrl;
+                    this._scope = scope;
+                    const result = await auth(this._authProvider, {
+                        serverUrl: this._url,
+                        resourceMetadataUrl: this._resourceMetadataUrl,
+                        scope: this._scope,
+                        fetchFn: this._fetchWithInit
+                    });
+                    if (result !== 'AUTHORIZED') {
+                        throw new UnauthorizedError();
+                    }
+                    // Purposely _not_ awaited, so we don't call onerror twice
+                    return this.send(message);
+                }
+                throw new Error(`Error POSTing to endpoint (HTTP ${response.status}): ${text}`);
+            }
+            // Release connection - POST responses don't have content we need
+            await response.body?.cancel();
+        }
+        catch (error) {
+            this.onerror?.(error);
+            throw error;
+        }
+    }
+    setProtocolVersion(version) {
+        this._protocolVersion = version;
+    }
+}
+//# sourceMappingURL=sse.js.map

extracted-source/node_modules/@modelcontextprotocol/sdk/dist/esm/client/stdio.js

@@ -0,0 +1,191 @@
+import spawn from 'cross-spawn';
+import process from 'node:process';
+import { PassThrough } from 'node:stream';
+import { ReadBuffer, serializeMessage } from '../shared/stdio.js';
+/**
+ * Environment variables to inherit by default, if an environment is not explicitly given.
+ */
+export const DEFAULT_INHERITED_ENV_VARS = process.platform === 'win32'
+    ? [
+        'APPDATA',
+        'HOMEDRIVE',
+        'HOMEPATH',
+        'LOCALAPPDATA',
+        'PATH',
+        'PROCESSOR_ARCHITECTURE',
+        'SYSTEMDRIVE',
+        'SYSTEMROOT',
+        'TEMP',
+        'USERNAME',
+        'USERPROFILE',
+        'PROGRAMFILES'
+    ]
+    : /* list inspired by the default env inheritance of sudo */
+        ['HOME', 'LOGNAME', 'PATH', 'SHELL', 'TERM', 'USER'];
+/**
+ * Returns a default environment object including only environment variables deemed safe to inherit.
+ */
+export function getDefaultEnvironment() {
+    const env = {};
+    for (const key of DEFAULT_INHERITED_ENV_VARS) {
+        const value = process.env[key];
+        if (value === undefined) {
+            continue;
+        }
+        if (value.startsWith('()')) {
+            // Skip functions, which are a security risk.
+            continue;
+        }
+        env[key] = value;
+    }
+    return env;
+}
+/**
+ * Client transport for stdio: this will connect to a server by spawning a process and communicating with it over stdin/stdout.
+ *
+ * This transport is only available in Node.js environments.
+ */
+export class StdioClientTransport {
+    constructor(server) {
+        this._readBuffer = new ReadBuffer();
+        this._stderrStream = null;
+        this._serverParams = server;
+        if (server.stderr === 'pipe' || server.stderr === 'overlapped') {
+            this._stderrStream = new PassThrough();
+        }
+    }
+    /**
+     * Starts the server process and prepares to communicate with it.
+     */
+    async start() {
+        if (this._process) {
+            throw new Error('StdioClientTransport already started! If using Client class, note that connect() calls start() automatically.');
+        }
+        return new Promise((resolve, reject) => {
+            this._process = spawn(this._serverParams.command, this._serverParams.args ?? [], {
+                // merge default env with server env because mcp server needs some env vars
+                env: {
+                    ...getDefaultEnvironment(),
+                    ...this._serverParams.env
+                },
+                stdio: ['pipe', 'pipe', this._serverParams.stderr ?? 'inherit'],
+                shell: false,
+                windowsHide: process.platform === 'win32' && isElectron(),
+                cwd: this._serverParams.cwd
+            });
+            this._process.on('error', error => {
+                reject(error);
+                this.onerror?.(error);
+            });
+            this._process.on('spawn', () => {
+                resolve();
+            });
+            this._process.on('close', _code => {
+                this._process = undefined;
+                this.onclose?.();
+            });
+            this._process.stdin?.on('error', error => {
+                this.onerror?.(error);
+            });
+            this._process.stdout?.on('data', chunk => {
+                this._readBuffer.append(chunk);
+                this.processReadBuffer();
+            });
+            this._process.stdout?.on('error', error => {
+                this.onerror?.(error);
+            });
+            if (this._stderrStream && this._process.stderr) {
+                this._process.stderr.pipe(this._stderrStream);
+            }
+        });
+    }
+    /**
+     * The stderr stream of the child process, if `StdioServerParameters.stderr` was set to "pipe" or "overlapped".
+     *
+     * If stderr piping was requested, a PassThrough stream is returned _immediately_, allowing callers to
+     * attach listeners before the start method is invoked. This prevents loss of any early
+     * error output emitted by the child process.
+     */
+    get stderr() {
+        if (this._stderrStream) {
+            return this._stderrStream;
+        }
+        return this._process?.stderr ?? null;
+    }
+    /**
+     * The child process pid spawned by this transport.
+     *
+     * This is only available after the transport has been started.
+     */
+    get pid() {
+        return this._process?.pid ?? null;
+    }
+    processReadBuffer() {
+        while (true) {
+            try {
+                const message = this._readBuffer.readMessage();
+                if (message === null) {
+                    break;
+                }
+                this.onmessage?.(message);
+            }
+            catch (error) {
+                this.onerror?.(error);
+            }
+        }
+    }
+    async close() {
+        if (this._process) {
+            const processToClose = this._process;
+            this._process = undefined;
+            const closePromise = new Promise(resolve => {
+                processToClose.once('close', () => {
+                    resolve();
+                });
+            });
+            try {
+                processToClose.stdin?.end();
+            }
+            catch {
+                // ignore
+            }
+            await Promise.race([closePromise, new Promise(resolve => setTimeout(resolve, 2000).unref())]);
+            if (processToClose.exitCode === null) {
+                try {
+                    processToClose.kill('SIGTERM');
+                }
+                catch {
+                    // ignore
+                }
+                await Promise.race([closePromise, new Promise(resolve => setTimeout(resolve, 2000).unref())]);
+            }
+            if (processToClose.exitCode === null) {
+                try {
+                    processToClose.kill('SIGKILL');
+                }
+                catch {
+                    // ignore
+                }
+            }
+        }
+        this._readBuffer.clear();
+    }
+    send(message) {
+        return new Promise(resolve => {
+            if (!this._process?.stdin) {
+                throw new Error('Not connected');
+            }
+            const json = serializeMessage(message);
+            if (this._process.stdin.write(json)) {
+                resolve();
+            }
+            else {
+                this._process.stdin.once('drain', resolve);
+            }
+        });
+    }
+}
+function isElectron() {
+    return 'type' in process;
+}
+//# sourceMappingURL=stdio.js.map

extracted-source/node_modules/@modelcontextprotocol/sdk/dist/esm/client/streamableHttp.js

@@ -0,0 +1,477 @@
+import { createFetchWithInit, normalizeHeaders } from '../shared/transport.js';
+import { isInitializedNotification, isJSONRPCRequest, isJSONRPCResultResponse, JSONRPCMessageSchema } from '../types.js';
+import { auth, extractWWWAuthenticateParams, UnauthorizedError } from './auth.js';
+import { EventSourceParserStream } from 'eventsource-parser/stream';
+// Default reconnection options for StreamableHTTP connections
+const DEFAULT_STREAMABLE_HTTP_RECONNECTION_OPTIONS = {
+    initialReconnectionDelay: 1000,
+    maxReconnectionDelay: 30000,
+    reconnectionDelayGrowFactor: 1.5,
+    maxRetries: 2
+};
+export class StreamableHTTPError extends Error {
+    constructor(code, message) {
+        super(`Streamable HTTP error: ${message}`);
+        this.code = code;
+    }
+}
+/**
+ * Client transport for Streamable HTTP: this implements the MCP Streamable HTTP transport specification.
+ * It will connect to a server using HTTP POST for sending messages and HTTP GET with Server-Sent Events
+ * for receiving messages.
+ */
+export class StreamableHTTPClientTransport {
+    constructor(url, opts) {
+        this._hasCompletedAuthFlow = false; // Circuit breaker: detect auth success followed by immediate 401
+        this._url = url;
+        this._resourceMetadataUrl = undefined;
+        this._scope = undefined;
+        this._requestInit = opts?.requestInit;
+        this._authProvider = opts?.authProvider;
+        this._fetch = opts?.fetch;
+        this._fetchWithInit = createFetchWithInit(opts?.fetch, opts?.requestInit);
+        this._sessionId = opts?.sessionId;
+        this._reconnectionOptions = opts?.reconnectionOptions ?? DEFAULT_STREAMABLE_HTTP_RECONNECTION_OPTIONS;
+    }
+    async _authThenStart() {
+        if (!this._authProvider) {
+            throw new UnauthorizedError('No auth provider');
+        }
+        let result;
+        try {
+            result = await auth(this._authProvider, {
+                serverUrl: this._url,
+                resourceMetadataUrl: this._resourceMetadataUrl,
+                scope: this._scope,
+                fetchFn: this._fetchWithInit
+            });
+        }
+        catch (error) {
+            this.onerror?.(error);
+            throw error;
+        }
+        if (result !== 'AUTHORIZED') {
+            throw new UnauthorizedError();
+        }
+        return await this._startOrAuthSse({ resumptionToken: undefined });
+    }
+    async _commonHeaders() {
+        const headers = {};
+        if (this._authProvider) {
+            const tokens = await this._authProvider.tokens();
+            if (tokens) {
+                headers['Authorization'] = `Bearer ${tokens.access_token}`;
+            }
+        }
+        if (this._sessionId) {
+            headers['mcp-session-id'] = this._sessionId;
+        }
+        if (this._protocolVersion) {
+            headers['mcp-protocol-version'] = this._protocolVersion;
+        }
+        const extraHeaders = normalizeHeaders(this._requestInit?.headers);
+        return new Headers({
+            ...headers,
+            ...extraHeaders
+        });
+    }
+    async _startOrAuthSse(options) {
+        const { resumptionToken } = options;
+        try {
+            // Try to open an initial SSE stream with GET to listen for server messages
+            // This is optional according to the spec - server may not support it
+            const headers = await this._commonHeaders();
+            headers.set('Accept', 'text/event-stream');
+            // Include Last-Event-ID header for resumable streams if provided
+            if (resumptionToken) {
+                headers.set('last-event-id', resumptionToken);
+            }
+            const response = await (this._fetch ?? fetch)(this._url, {
+                method: 'GET',
+                headers,
+                signal: this._abortController?.signal
+            });
+            if (!response.ok) {
+                await response.body?.cancel();
+                if (response.status === 401 && this._authProvider) {
+                    // Need to authenticate
+                    return await this._authThenStart();
+                }
+                // 405 indicates that the server does not offer an SSE stream at GET endpoint
+                // This is an expected case that should not trigger an error
+                if (response.status === 405) {
+                    return;
+                }
+                throw new StreamableHTTPError(response.status, `Failed to open SSE stream: ${response.statusText}`);
+            }
+            this._handleSseStream(response.body, options, true);
+        }
+        catch (error) {
+            this.onerror?.(error);
+            throw error;
+        }
+    }
+    /**
+     * Calculates the next reconnection delay using  backoff algorithm
+     *
+     * @param attempt Current reconnection attempt count for the specific stream
+     * @returns Time to wait in milliseconds before next reconnection attempt
+     */
+    _getNextReconnectionDelay(attempt) {
+        // Use server-provided retry value if available
+        if (this._serverRetryMs !== undefined) {
+            return this._serverRetryMs;
+        }
+        // Fall back to exponential backoff
+        const initialDelay = this._reconnectionOptions.initialReconnectionDelay;
+        const growFactor = this._reconnectionOptions.reconnectionDelayGrowFactor;
+        const maxDelay = this._reconnectionOptions.maxReconnectionDelay;
+        // Cap at maximum delay
+        return Math.min(initialDelay * Math.pow(growFactor, attempt), maxDelay);
+    }
+    /**
+     * Schedule a reconnection attempt using server-provided retry interval or backoff
+     *
+     * @param lastEventId The ID of the last received event for resumability
+     * @param attemptCount Current reconnection attempt count for this specific stream
+     */
+    _scheduleReconnection(options, attemptCount = 0) {
+        // Use provided options or default options
+        const maxRetries = this._reconnectionOptions.maxRetries;
+        // Check if we've exceeded maximum retry attempts
+        if (attemptCount >= maxRetries) {
+            this.onerror?.(new Error(`Maximum reconnection attempts (${maxRetries}) exceeded.`));
+            return;
+        }
+        // Calculate next delay based on current attempt count
+        const delay = this._getNextReconnectionDelay(attemptCount);
+        // Schedule the reconnection
+        this._reconnectionTimeout = setTimeout(() => {
+            // Use the last event ID to resume where we left off
+            this._startOrAuthSse(options).catch(error => {
+                this.onerror?.(new Error(`Failed to reconnect SSE stream: ${error instanceof Error ? error.message : String(error)}`));
+                // Schedule another attempt if this one failed, incrementing the attempt counter
+                this._scheduleReconnection(options, attemptCount + 1);
+            });
+        }, delay);
+    }
+    _handleSseStream(stream, options, isReconnectable) {
+        if (!stream) {
+            return;
+        }
+        const { onresumptiontoken, replayMessageId } = options;
+        let lastEventId;
+        // Track whether we've received a priming event (event with ID)
+        // Per spec, server SHOULD send a priming event with ID before closing
+        let hasPrimingEvent = false;
+        // Track whether we've received a response - if so, no need to reconnect
+        // Reconnection is for when server disconnects BEFORE sending response
+        let receivedResponse = false;
+        const processStream = async () => {
+            // this is the closest we can get to trying to catch network errors
+            // if something happens reader will throw
+            try {
+                // Create a pipeline: binary stream -> text decoder -> SSE parser
+                const reader = stream
+                    .pipeThrough(new TextDecoderStream())
+                    .pipeThrough(new EventSourceParserStream({
+                    onRetry: (retryMs) => {
+                        // Capture server-provided retry value for reconnection timing
+                        this._serverRetryMs = retryMs;
+                    }
+                }))
+                    .getReader();
+                while (true) {
+                    const { value: event, done } = await reader.read();
+                    if (done) {
+                        break;
+                    }
+                    // Update last event ID if provided
+                    if (event.id) {
+                        lastEventId = event.id;
+                        // Mark that we've received a priming event - stream is now resumable
+                        hasPrimingEvent = true;
+                        onresumptiontoken?.(event.id);
+                    }
+                    // Skip events with no data (priming events, keep-alives)
+                    if (!event.data) {
+                        continue;
+                    }
+                    if (!event.event || event.event === 'message') {
+                        try {
+                            const message = JSONRPCMessageSchema.parse(JSON.parse(event.data));
+                            if (isJSONRPCResultResponse(message)) {
+                                // Mark that we received a response - no need to reconnect for this request
+                                receivedResponse = true;
+                                if (replayMessageId !== undefined) {
+                                    message.id = replayMessageId;
+                                }
+                            }
+                            this.onmessage?.(message);
+                        }
+                        catch (error) {
+                            this.onerror?.(error);
+                        }
+                    }
+                }
+                // Handle graceful server-side disconnect
+                // Server may close connection after sending event ID and retry field
+                // Reconnect if: already reconnectable (GET stream) OR received a priming event (POST stream with event ID)
+                // BUT don't reconnect if we already received a response - the request is complete
+                const canResume = isReconnectable || hasPrimingEvent;
+                const needsReconnect = canResume && !receivedResponse;
+                if (needsReconnect && this._abortController && !this._abortController.signal.aborted) {
+                    this._scheduleReconnection({
+                        resumptionToken: lastEventId,
+                        onresumptiontoken,
+                        replayMessageId
+                    }, 0);
+                }
+            }
+            catch (error) {
+                // Handle stream errors - likely a network disconnect
+                this.onerror?.(new Error(`SSE stream disconnected: ${error}`));
+                // Attempt to reconnect if the stream disconnects unexpectedly and we aren't closing
+                // Reconnect if: already reconnectable (GET stream) OR received a priming event (POST stream with event ID)
+                // BUT don't reconnect if we already received a response - the request is complete
+                const canResume = isReconnectable || hasPrimingEvent;
+                const needsReconnect = canResume && !receivedResponse;
+                if (needsReconnect && this._abortController && !this._abortController.signal.aborted) {
+                    // Use the exponential backoff reconnection strategy
+                    try {
+                        this._scheduleReconnection({
+                            resumptionToken: lastEventId,
+                            onresumptiontoken,
+                            replayMessageId
+                        }, 0);
+                    }
+                    catch (error) {
+                        this.onerror?.(new Error(`Failed to reconnect: ${error instanceof Error ? error.message : String(error)}`));
+                    }
+                }
+            }
+        };
+        processStream();
+    }
+    async start() {
+        if (this._abortController) {
+            throw new Error('StreamableHTTPClientTransport already started! If using Client class, note that connect() calls start() automatically.');
+        }
+        this._abortController = new AbortController();
+    }
+    /**
+     * Call this method after the user has finished authorizing via their user agent and is redirected back to the MCP client application. This will exchange the authorization code for an access token, enabling the next connection attempt to successfully auth.
+     */
+    async finishAuth(authorizationCode) {
+        if (!this._authProvider) {
+            throw new UnauthorizedError('No auth provider');
+        }
+        const result = await auth(this._authProvider, {
+            serverUrl: this._url,
+            authorizationCode,
+            resourceMetadataUrl: this._resourceMetadataUrl,
+            scope: this._scope,
+            fetchFn: this._fetchWithInit
+        });
+        if (result !== 'AUTHORIZED') {
+            throw new UnauthorizedError('Failed to authorize');
+        }
+    }
+    async close() {
+        if (this._reconnectionTimeout) {
+            clearTimeout(this._reconnectionTimeout);
+            this._reconnectionTimeout = undefined;
+        }
+        this._abortController?.abort();
+        this.onclose?.();
+    }
+    async send(message, options) {
+        try {
+            const { resumptionToken, onresumptiontoken } = options || {};
+            if (resumptionToken) {
+                // If we have at last event ID, we need to reconnect the SSE stream
+                this._startOrAuthSse({ resumptionToken, replayMessageId: isJSONRPCRequest(message) ? message.id : undefined }).catch(err => this.onerror?.(err));
+                return;
+            }
+            const headers = await this._commonHeaders();
+            headers.set('content-type', 'application/json');
+            headers.set('accept', 'application/json, text/event-stream');
+            const init = {
+                ...this._requestInit,
+                method: 'POST',
+                headers,
+                body: JSON.stringify(message),
+                signal: this._abortController?.signal
+            };
+            const response = await (this._fetch ?? fetch)(this._url, init);
+            // Handle session ID received during initialization
+            const sessionId = response.headers.get('mcp-session-id');
+            if (sessionId) {
+                this._sessionId = sessionId;
+            }
+            if (!response.ok) {
+                const text = await response.text().catch(() => null);
+                if (response.status === 401 && this._authProvider) {
+                    // Prevent infinite recursion when server returns 401 after successful auth
+                    if (this._hasCompletedAuthFlow) {
+                        throw new StreamableHTTPError(401, 'Server returned 401 after successful authentication');
+                    }
+                    const { resourceMetadataUrl, scope } = extractWWWAuthenticateParams(response);
+                    this._resourceMetadataUrl = resourceMetadataUrl;
+                    this._scope = scope;
+                    const result = await auth(this._authProvider, {
+                        serverUrl: this._url,
+                        resourceMetadataUrl: this._resourceMetadataUrl,
+                        scope: this._scope,
+                        fetchFn: this._fetchWithInit
+                    });
+                    if (result !== 'AUTHORIZED') {
+                        throw new UnauthorizedError();
+                    }
+                    // Mark that we completed auth flow
+                    this._hasCompletedAuthFlow = true;
+                    // Purposely _not_ awaited, so we don't call onerror twice
+                    return this.send(message);
+                }
+                if (response.status === 403 && this._authProvider) {
+                    const { resourceMetadataUrl, scope, error } = extractWWWAuthenticateParams(response);
+                    if (error === 'insufficient_scope') {
+                        const wwwAuthHeader = response.headers.get('WWW-Authenticate');
+                        // Check if we've already tried upscoping with this header to prevent infinite loops.
+                        if (this._lastUpscopingHeader === wwwAuthHeader) {
+                            throw new StreamableHTTPError(403, 'Server returned 403 after trying upscoping');
+                        }
+                        if (scope) {
+                            this._scope = scope;
+                        }
+                        if (resourceMetadataUrl) {
+                            this._resourceMetadataUrl = resourceMetadataUrl;
+                        }
+                        // Mark that upscoping was tried.
+                        this._lastUpscopingHeader = wwwAuthHeader ?? undefined;
+                        const result = await auth(this._authProvider, {
+                            serverUrl: this._url,
+                            resourceMetadataUrl: this._resourceMetadataUrl,
+                            scope: this._scope,
+                            fetchFn: this._fetch
+                        });
+                        if (result !== 'AUTHORIZED') {
+                            throw new UnauthorizedError();
+                        }
+                        return this.send(message);
+                    }
+                }
+                throw new StreamableHTTPError(response.status, `Error POSTing to endpoint: ${text}`);
+            }
+            // Reset auth loop flag on successful response
+            this._hasCompletedAuthFlow = false;
+            this._lastUpscopingHeader = undefined;
+            // If the response is 202 Accepted, there's no body to process
+            if (response.status === 202) {
+                await response.body?.cancel();
+                // if the accepted notification is initialized, we start the SSE stream
+                // if it's supported by the server
+                if (isInitializedNotification(message)) {
+                    // Start without a lastEventId since this is a fresh connection
+                    this._startOrAuthSse({ resumptionToken: undefined }).catch(err => this.onerror?.(err));
+                }
+                return;
+            }
+            // Get original message(s) for detecting request IDs
+            const messages = Array.isArray(message) ? message : [message];
+            const hasRequests = messages.filter(msg => 'method' in msg && 'id' in msg && msg.id !== undefined).length > 0;
+            // Check the response type
+            const contentType = response.headers.get('content-type');
+            if (hasRequests) {
+                if (contentType?.includes('text/event-stream')) {
+                    // Handle SSE stream responses for requests
+                    // We use the same handler as standalone streams, which now supports
+                    // reconnection with the last event ID
+                    this._handleSseStream(response.body, { onresumptiontoken }, false);
+                }
+                else if (contentType?.includes('application/json')) {
+                    // For non-streaming servers, we might get direct JSON responses
+                    const data = await response.json();
+                    const responseMessages = Array.isArray(data)
+                        ? data.map(msg => JSONRPCMessageSchema.parse(msg))
+                        : [JSONRPCMessageSchema.parse(data)];
+                    for (const msg of responseMessages) {
+                        this.onmessage?.(msg);
+                    }
+                }
+                else {
+                    await response.body?.cancel();
+                    throw new StreamableHTTPError(-1, `Unexpected content type: ${contentType}`);
+                }
+            }
+            else {
+                // No requests in message but got 200 OK - still need to release connection
+                await response.body?.cancel();
+            }
+        }
+        catch (error) {
+            this.onerror?.(error);
+            throw error;
+        }
+    }
+    get sessionId() {
+        return this._sessionId;
+    }
+    /**
+     * Terminates the current session by sending a DELETE request to the server.
+     *
+     * Clients that no longer need a particular session
+     * (e.g., because the user is leaving the client application) SHOULD send an
+     * HTTP DELETE to the MCP endpoint with the Mcp-Session-Id header to explicitly
+     * terminate the session.
+     *
+     * The server MAY respond with HTTP 405 Method Not Allowed, indicating that
+     * the server does not allow clients to terminate sessions.
+     */
+    async terminateSession() {
+        if (!this._sessionId) {
+            return; // No session to terminate
+        }
+        try {
+            const headers = await this._commonHeaders();
+            const init = {
+                ...this._requestInit,
+                method: 'DELETE',
+                headers,
+                signal: this._abortController?.signal
+            };
+            const response = await (this._fetch ?? fetch)(this._url, init);
+            await response.body?.cancel();
+            // We specifically handle 405 as a valid response according to the spec,
+            // meaning the server does not support explicit session termination
+            if (!response.ok && response.status !== 405) {
+                throw new StreamableHTTPError(response.status, `Failed to terminate session: ${response.statusText}`);
+            }
+            this._sessionId = undefined;
+        }
+        catch (error) {
+            this.onerror?.(error);
+            throw error;
+        }
+    }
+    setProtocolVersion(version) {
+        this._protocolVersion = version;
+    }
+    get protocolVersion() {
+        return this._protocolVersion;
+    }
+    /**
+     * Resume an SSE stream from a previous event ID.
+     * Opens a GET SSE connection with Last-Event-ID header to replay missed events.
+     *
+     * @param lastEventId The event ID to resume from
+     * @param options Optional callback to receive new resumption tokens
+     */
+    async resumeStream(lastEventId, options) {
+        await this._startOrAuthSse({
+            resumptionToken: lastEventId,
+            onresumptiontoken: options?.onresumptiontoken
+        });
+    }
+}
+//# sourceMappingURL=streamableHttp.js.map