Merge branch 'main' into request-propagation-in-tools

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Konstantin Konstantinov 2025-06-24 17:21:09 +03:00 • committed by GitHub
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0
.git-blame-ignore-revs Normal file
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103
README.md
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@ -849,6 +849,109 @@ const transport = new StdioServerTransport();
await server.connect(transport);
```
### Eliciting User Input
MCP servers can request additional information from users through the elicitation feature. This is useful for interactive workflows where the server needs user input or confirmation:
```typescript
// Server-side: Restaurant booking tool that asks for alternatives
server.tool(
"book-restaurant",
{
restaurant: z.string(),
date: z.string(),
partySize: z.number()
},
async ({ restaurant, date, partySize }) => {
// Check availability
const available = await checkAvailability(restaurant, date, partySize);
if (!available) {
// Ask user if they want to try alternative dates
const result = await server.server.elicitInput({
message: `No tables available at ${restaurant} on ${date}. Would you like to check alternative dates?`,
requestedSchema: {
type: "object",
properties: {
checkAlternatives: {
type: "boolean",
title: "Check alternative dates",
description: "Would you like me to check other dates?"
},
flexibleDates: {
type: "string",
title: "Date flexibility",
description: "How flexible are your dates?",
enum: ["next_day", "same_week", "next_week"],
enumNames: ["Next day", "Same week", "Next week"]
}
},
required: ["checkAlternatives"]
}
});
if (result.action === "accept" && result.content?.checkAlternatives) {
const alternatives = await findAlternatives(
restaurant,
date,
partySize,
result.content.flexibleDates as string
);
return {
content: [{
type: "text",
text: `Found these alternatives: ${alternatives.join(", ")}`
}]
};
}
return {
content: [{
type: "text",
text: "No booking made. Original date not available."
}]
};
}
// Book the table
await makeBooking(restaurant, date, partySize);
return {
content: [{
type: "text",
text: `Booked table for ${partySize} at ${restaurant} on ${date}`
}]
};
}
);
```
Client-side: Handle elicitation requests
```typescript
// This is a placeholder - implement based on your UI framework
async function getInputFromUser(message: string, schema: any): Promise<{
action: "accept" | "reject" | "cancel";
data?: Record<string, any>;
}> {
// This should be implemented depending on the app
throw new Error("getInputFromUser must be implemented for your platform");
}
client.setRequestHandler(ElicitRequestSchema, async (request) => {
const userResponse = await getInputFromUser(
request.params.message,
request.params.requestedSchema
);
return {
action: userResponse.action,
content: userResponse.action === "accept" ? userResponse.data : undefined
};
});
```
**Note**: Elicitation requires client support. Clients must declare the `elicitation` capability during initialization.
### Writing MCP Clients
The SDK provides a high-level client interface:

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@ -15,5 +15,12 @@ export default tseslint.config(
{ "argsIgnorePattern": "^_" }
]
}
},
{
files: ["src/client/**/*.ts", "src/server/**/*.ts"],
ignores: ["**/*.test.ts"],
rules: {
"no-console": "error"
}
}
);

3
package-lock.json generated
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@ -1,12 +1,11 @@
{
"name": "@modelcontextprotocol/sdk",
"version": "1.12.0",
"lockfileVersion": 3,
"requires": true,
"packages": {
"": {
"name": "@modelcontextprotocol/sdk",
"version": "1.12.0",
"version": "1.13.1",
"license": "MIT",
"dependencies": {
"ajv": "^6.12.6",

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@ -1,6 +1,6 @@
{
"name": "@modelcontextprotocol/sdk",
"version": "1.12.3",
"version": "1.13.1",
"description": "Model Context Protocol implementation for TypeScript",
"license": "MIT",
"author": "Anthropic, PBC (https://anthropic.com)",
@ -36,8 +36,11 @@
],
"scripts": {
"build": "npm run build:esm && npm run build:cjs",
"build:esm": "tsc -p tsconfig.prod.json && echo '{\"type\": \"module\"}' > dist/esm/package.json",
"build:cjs": "tsc -p tsconfig.cjs.json && echo '{\"type\": \"commonjs\"}' > dist/cjs/package.json",
"build:esm": "mkdir -p dist/esm && echo '{\"type\": \"module\"}' > dist/esm/package.json && tsc -p tsconfig.prod.json",
"build:esm:w": "npm run build:esm -- -w",
"build:cjs": "mkdir -p dist/cjs && echo '{\"type\": \"commonjs\"}' > dist/cjs/package.json && tsc -p tsconfig.cjs.json",
"build:cjs:w": "npm run build:cjs -- -w",
"examples:simple-server:w": "tsx --watch src/examples/server/simpleStreamableHttp.ts --oauth",
"prepack": "npm run build:esm && npm run build:cjs",
"lint": "eslint src/",
"test": "jest",

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@ -1,3 +1,4 @@
import { LATEST_PROTOCOL_VERSION } from '../types.js';
import {
discoverOAuthMetadata,
startAuthorization,
@ -202,7 +203,145 @@ describe("OAuth Authorization", () => {
const [url, options] = calls[0];
expect(url.toString()).toBe("https://auth.example.com/.well-known/oauth-authorization-server");
expect(options.headers).toEqual({
"MCP-Protocol-Version": "2025-03-26"
"MCP-Protocol-Version": LATEST_PROTOCOL_VERSION
});
});
it("returns metadata when discovery succeeds with path", async () => {
mockFetch.mockResolvedValueOnce({
ok: true,
status: 200,
json: async () => validMetadata,
});
const metadata = await discoverOAuthMetadata("https://auth.example.com/path/name");
expect(metadata).toEqual(validMetadata);
const calls = mockFetch.mock.calls;
expect(calls.length).toBe(1);
const [url, options] = calls[0];
expect(url.toString()).toBe("https://auth.example.com/.well-known/oauth-authorization-server/path/name");
expect(options.headers).toEqual({
"MCP-Protocol-Version": LATEST_PROTOCOL_VERSION
});
});
it("falls back to root discovery when path-aware discovery returns 404", async () => {
// First call (path-aware) returns 404
mockFetch.mockResolvedValueOnce({
ok: false,
status: 404,
});
// Second call (root fallback) succeeds
mockFetch.mockResolvedValueOnce({
ok: true,
status: 200,
json: async () => validMetadata,
});
const metadata = await discoverOAuthMetadata("https://auth.example.com/path/name");
expect(metadata).toEqual(validMetadata);
const calls = mockFetch.mock.calls;
expect(calls.length).toBe(2);
// First call should be path-aware
const [firstUrl, firstOptions] = calls[0];
expect(firstUrl.toString()).toBe("https://auth.example.com/.well-known/oauth-authorization-server/path/name");
expect(firstOptions.headers).toEqual({
"MCP-Protocol-Version": LATEST_PROTOCOL_VERSION
});
// Second call should be root fallback
const [secondUrl, secondOptions] = calls[1];
expect(secondUrl.toString()).toBe("https://auth.example.com/.well-known/oauth-authorization-server");
expect(secondOptions.headers).toEqual({
"MCP-Protocol-Version": LATEST_PROTOCOL_VERSION
});
});
it("returns undefined when both path-aware and root discovery return 404", async () => {
// First call (path-aware) returns 404
mockFetch.mockResolvedValueOnce({
ok: false,
status: 404,
});
// Second call (root fallback) also returns 404
mockFetch.mockResolvedValueOnce({
ok: false,
status: 404,
});
const metadata = await discoverOAuthMetadata("https://auth.example.com/path/name");
expect(metadata).toBeUndefined();
const calls = mockFetch.mock.calls;
expect(calls.length).toBe(2);
});
it("does not fallback when the original URL is already at root path", async () => {
// First call (path-aware for root) returns 404
mockFetch.mockResolvedValueOnce({
ok: false,
status: 404,
});
const metadata = await discoverOAuthMetadata("https://auth.example.com/");
expect(metadata).toBeUndefined();
const calls = mockFetch.mock.calls;
expect(calls.length).toBe(1); // Should not attempt fallback
const [url] = calls[0];
expect(url.toString()).toBe("https://auth.example.com/.well-known/oauth-authorization-server");
});
it("does not fallback when the original URL has no path", async () => {
// First call (path-aware for no path) returns 404
mockFetch.mockResolvedValueOnce({
ok: false,
status: 404,
});
const metadata = await discoverOAuthMetadata("https://auth.example.com");
expect(metadata).toBeUndefined();
const calls = mockFetch.mock.calls;
expect(calls.length).toBe(1); // Should not attempt fallback
const [url] = calls[0];
expect(url.toString()).toBe("https://auth.example.com/.well-known/oauth-authorization-server");
});
it("falls back when path-aware discovery encounters CORS error", async () => {
// First call (path-aware) fails with TypeError (CORS)
mockFetch.mockImplementationOnce(() => Promise.reject(new TypeError("CORS error")));
// Retry path-aware without headers (simulating CORS retry)
mockFetch.mockResolvedValueOnce({
ok: false,
status: 404,
});
// Second call (root fallback) succeeds
mockFetch.mockResolvedValueOnce({
ok: true,
status: 200,
json: async () => validMetadata,
});
const metadata = await discoverOAuthMetadata("https://auth.example.com/deep/path");
expect(metadata).toEqual(validMetadata);
const calls = mockFetch.mock.calls;
expect(calls.length).toBe(3);
// Final call should be root fallback
const [lastUrl, lastOptions] = calls[2];
expect(lastUrl.toString()).toBe("https://auth.example.com/.well-known/oauth-authorization-server");
expect(lastOptions.headers).toEqual({
"MCP-Protocol-Version": LATEST_PROTOCOL_VERSION
});
});
@ -324,6 +463,7 @@ describe("OAuth Authorization", () => {
metadata: undefined,
clientInformation: validClientInfo,
redirectUrl: "http://localhost:3000/callback",
resource: new URL("https://api.example.com/mcp-server"),
}
);
@ -338,6 +478,7 @@ describe("OAuth Authorization", () => {
expect(authorizationUrl.searchParams.get("redirect_uri")).toBe(
"http://localhost:3000/callback"
);
expect(authorizationUrl.searchParams.get("resource")).toBe("https://api.example.com/mcp-server");
expect(codeVerifier).toBe("test_verifier");
});
@ -465,6 +606,7 @@ describe("OAuth Authorization", () => {
authorizationCode: "code123",
codeVerifier: "verifier123",
redirectUri: "http://localhost:3000/callback",
resource: new URL("https://api.example.com/mcp-server"),
});
expect(tokens).toEqual(validTokens);
@ -487,6 +629,7 @@ describe("OAuth Authorization", () => {
expect(body.get("client_id")).toBe("client123");
expect(body.get("client_secret")).toBe("secret123");
expect(body.get("redirect_uri")).toBe("http://localhost:3000/callback");
expect(body.get("resource")).toBe("https://api.example.com/mcp-server");
});
it("validates token response schema", async () => {
@ -554,6 +697,7 @@ describe("OAuth Authorization", () => {
const tokens = await refreshAuthorization("https://auth.example.com", {
clientInformation: validClientInfo,
refreshToken: "refresh123",
resource: new URL("https://api.example.com/mcp-server"),
});
expect(tokens).toEqual(validTokensWithNewRefreshToken);
@ -574,6 +718,7 @@ describe("OAuth Authorization", () => {
expect(body.get("refresh_token")).toBe("refresh123");
expect(body.get("client_id")).toBe("client123");
expect(body.get("client_secret")).toBe("secret123");
expect(body.get("resource")).toBe("https://api.example.com/mcp-server");
});
it("exchanges refresh token for new tokens and keep existing refresh token if none is returned", async () => {
@ -807,5 +952,297 @@ describe("OAuth Authorization", () => {
"https://resource.example.com/.well-known/oauth-authorization-server"
);
});
it("passes resource parameter through authorization flow", async () => {
// Mock successful metadata discovery
mockFetch.mockImplementation((url) => {
const urlString = url.toString();
if (urlString.includes("/.well-known/oauth-authorization-server")) {
return Promise.resolve({
ok: true,
status: 200,
json: async () => ({
issuer: "https://auth.example.com",
authorization_endpoint: "https://auth.example.com/authorize",
token_endpoint: "https://auth.example.com/token",
response_types_supported: ["code"],
code_challenge_methods_supported: ["S256"],
}),
});
}
return Promise.resolve({ ok: false, status: 404 });
});
// Mock provider methods for authorization flow
(mockProvider.clientInformation as jest.Mock).mockResolvedValue({
client_id: "test-client",
client_secret: "test-secret",
});
(mockProvider.tokens as jest.Mock).mockResolvedValue(undefined);
(mockProvider.saveCodeVerifier as jest.Mock).mockResolvedValue(undefined);
(mockProvider.redirectToAuthorization as jest.Mock).mockResolvedValue(undefined);
// Call auth without authorization code (should trigger redirect)
const result = await auth(mockProvider, {
serverUrl: "https://api.example.com/mcp-server",
});
expect(result).toBe("REDIRECT");
// Verify the authorization URL includes the resource parameter
expect(mockProvider.redirectToAuthorization).toHaveBeenCalledWith(
expect.objectContaining({
searchParams: expect.any(URLSearchParams),
})
);
const redirectCall = (mockProvider.redirectToAuthorization as jest.Mock).mock.calls[0];
const authUrl: URL = redirectCall[0];
expect(authUrl.searchParams.get("resource")).toBe("https://api.example.com/mcp-server");
});
it("includes resource in token exchange when authorization code is provided", async () => {
// Mock successful metadata discovery and token exchange
mockFetch.mockImplementation((url) => {
const urlString = url.toString();
if (urlString.includes("/.well-known/oauth-authorization-server")) {
return Promise.resolve({
ok: true,
status: 200,
json: async () => ({
issuer: "https://auth.example.com",
authorization_endpoint: "https://auth.example.com/authorize",
token_endpoint: "https://auth.example.com/token",
response_types_supported: ["code"],
code_challenge_methods_supported: ["S256"],
}),
});
} else if (urlString.includes("/token")) {
return Promise.resolve({
ok: true,
status: 200,
json: async () => ({
access_token: "access123",
token_type: "Bearer",
expires_in: 3600,
refresh_token: "refresh123",
}),
});
}
return Promise.resolve({ ok: false, status: 404 });
});
// Mock provider methods for token exchange
(mockProvider.clientInformation as jest.Mock).mockResolvedValue({
client_id: "test-client",
client_secret: "test-secret",
});
(mockProvider.codeVerifier as jest.Mock).mockResolvedValue("test-verifier");
(mockProvider.saveTokens as jest.Mock).mockResolvedValue(undefined);
// Call auth with authorization code
const result = await auth(mockProvider, {
serverUrl: "https://api.example.com/mcp-server",
authorizationCode: "auth-code-123",
});
expect(result).toBe("AUTHORIZED");
// Find the token exchange call
const tokenCall = mockFetch.mock.calls.find(call =>
call[0].toString().includes("/token")
);
expect(tokenCall).toBeDefined();
const body = tokenCall![1].body as URLSearchParams;
expect(body.get("resource")).toBe("https://api.example.com/mcp-server");
expect(body.get("code")).toBe("auth-code-123");
});
it("includes resource in token refresh", async () => {
// Mock successful metadata discovery and token refresh
mockFetch.mockImplementation((url) => {
const urlString = url.toString();
if (urlString.includes("/.well-known/oauth-authorization-server")) {
return Promise.resolve({
ok: true,
status: 200,
json: async () => ({
issuer: "https://auth.example.com",
authorization_endpoint: "https://auth.example.com/authorize",
token_endpoint: "https://auth.example.com/token",
response_types_supported: ["code"],
code_challenge_methods_supported: ["S256"],
}),
});
} else if (urlString.includes("/token")) {
return Promise.resolve({
ok: true,
status: 200,
json: async () => ({
access_token: "new-access123",
token_type: "Bearer",
expires_in: 3600,
}),
});
}
return Promise.resolve({ ok: false, status: 404 });
});
// Mock provider methods for token refresh
(mockProvider.clientInformation as jest.Mock).mockResolvedValue({
client_id: "test-client",
client_secret: "test-secret",
});
(mockProvider.tokens as jest.Mock).mockResolvedValue({
access_token: "old-access",
refresh_token: "refresh123",
});
(mockProvider.saveTokens as jest.Mock).mockResolvedValue(undefined);
// Call auth with existing tokens (should trigger refresh)
const result = await auth(mockProvider, {
serverUrl: "https://api.example.com/mcp-server",
});
expect(result).toBe("AUTHORIZED");
// Find the token refresh call
const tokenCall = mockFetch.mock.calls.find(call =>
call[0].toString().includes("/token")
);
expect(tokenCall).toBeDefined();
const body = tokenCall![1].body as URLSearchParams;
expect(body.get("resource")).toBe("https://api.example.com/mcp-server");
expect(body.get("grant_type")).toBe("refresh_token");
expect(body.get("refresh_token")).toBe("refresh123");
});
it("skips default PRM resource validation when custom validateResourceURL is provided", async () => {
const mockValidateResourceURL = jest.fn().mockResolvedValue(undefined);
const providerWithCustomValidation = {
...mockProvider,
validateResourceURL: mockValidateResourceURL,
};
// Mock protected resource metadata with mismatched resource URL
// This would normally throw an error in default validation, but should be skipped
mockFetch.mockImplementation((url) => {
const urlString = url.toString();
if (urlString.includes("/.well-known/oauth-protected-resource")) {
return Promise.resolve({
ok: true,
status: 200,
json: async () => ({
resource: "https://different-resource.example.com/mcp-server", // Mismatched resource
authorization_servers: ["https://auth.example.com"],
}),
});
} else if (urlString.includes("/.well-known/oauth-authorization-server")) {
return Promise.resolve({
ok: true,
status: 200,
json: async () => ({
issuer: "https://auth.example.com",
authorization_endpoint: "https://auth.example.com/authorize",
token_endpoint: "https://auth.example.com/token",
response_types_supported: ["code"],
code_challenge_methods_supported: ["S256"],
}),
});
}
return Promise.resolve({ ok: false, status: 404 });
});
// Mock provider methods
(providerWithCustomValidation.clientInformation as jest.Mock).mockResolvedValue({
client_id: "test-client",
client_secret: "test-secret",
});
(providerWithCustomValidation.tokens as jest.Mock).mockResolvedValue(undefined);
(providerWithCustomValidation.saveCodeVerifier as jest.Mock).mockResolvedValue(undefined);
(providerWithCustomValidation.redirectToAuthorization as jest.Mock).mockResolvedValue(undefined);
// Call auth - should succeed despite resource mismatch because custom validation overrides default
const result = await auth(providerWithCustomValidation, {
serverUrl: "https://api.example.com/mcp-server",
});
expect(result).toBe("REDIRECT");
// Verify custom validation method was called
expect(mockValidateResourceURL).toHaveBeenCalledWith(
new URL("https://api.example.com/mcp-server"),
"https://different-resource.example.com/mcp-server"
);
});
it("uses prefix of server URL from PRM resource as resource parameter", async () => {
// Mock successful metadata discovery with resource URL that is a prefix of requested URL
mockFetch.mockImplementation((url) => {
const urlString = url.toString();
if (urlString.includes("/.well-known/oauth-protected-resource")) {
return Promise.resolve({
ok: true,
status: 200,
json: async () => ({
// Resource is a prefix of the requested server URL
resource: "https://api.example.com/",
authorization_servers: ["https://auth.example.com"],
}),
});
} else if (urlString.includes("/.well-known/oauth-authorization-server")) {
return Promise.resolve({
ok: true,
status: 200,
json: async () => ({
issuer: "https://auth.example.com",
authorization_endpoint: "https://auth.example.com/authorize",
token_endpoint: "https://auth.example.com/token",
response_types_supported: ["code"],
code_challenge_methods_supported: ["S256"],
}),
});
}
return Promise.resolve({ ok: false, status: 404 });
});
// Mock provider methods
(mockProvider.clientInformation as jest.Mock).mockResolvedValue({
client_id: "test-client",
client_secret: "test-secret",
});
(mockProvider.tokens as jest.Mock).mockResolvedValue(undefined);
(mockProvider.saveCodeVerifier as jest.Mock).mockResolvedValue(undefined);
(mockProvider.redirectToAuthorization as jest.Mock).mockResolvedValue(undefined);
// Call auth with a URL that has the resource as prefix
const result = await auth(mockProvider, {
serverUrl: "https://api.example.com/mcp-server/endpoint",
});
expect(result).toBe("REDIRECT");
// Verify the authorization URL includes the resource parameter from PRM
expect(mockProvider.redirectToAuthorization).toHaveBeenCalledWith(
expect.objectContaining({
searchParams: expect.any(URLSearchParams),
})
);
const redirectCall = (mockProvider.redirectToAuthorization as jest.Mock).mock.calls[0];
const authUrl: URL = redirectCall[0];
// Should use the PRM's resource value, not the full requested URL
expect(authUrl.searchParams.get("resource")).toBe("https://api.example.com/");
});
});
});

View file

@ -2,6 +2,7 @@ import pkceChallenge from "pkce-challenge";
import { LATEST_PROTOCOL_VERSION } from "../types.js";
import type { OAuthClientMetadata, OAuthClientInformation, OAuthTokens, OAuthMetadata, OAuthClientInformationFull, OAuthProtectedResourceMetadata } from "../shared/auth.js";
import { OAuthClientInformationFullSchema, OAuthMetadataSchema, OAuthProtectedResourceMetadataSchema, OAuthTokensSchema } from "../shared/auth.js";
import { checkResourceAllowed, resourceUrlFromServerUrl } from "../shared/auth-utils.js";
/**
* Implements an end-to-end OAuth client to be used with one MCP server.
@ -71,6 +72,15 @@ export interface OAuthClientProvider {
* the authorization result.
*/
codeVerifier(): string | Promise<string>;
/**
* If defined, overrides the selection and validation of the
* RFC 8707 Resource Indicator. If left undefined, default
* validation behavior will be used.
*
* Implementations must verify the returned resource matches the MCP server.
*/
validateResourceURL?(serverUrl: string | URL, resource?: string): Promise<URL | undefined>;
}
export type AuthResult = "AUTHORIZED" | "REDIRECT";
@ -99,18 +109,19 @@ export async function auth(
scope?: string;
resourceMetadataUrl?: URL }): Promise<AuthResult> {
let resourceMetadata: OAuthProtectedResourceMetadata | undefined;
let authorizationServerUrl = serverUrl;
try {
const resourceMetadata = await discoverOAuthProtectedResourceMetadata(
resourceMetadataUrl || serverUrl);
resourceMetadata = await discoverOAuthProtectedResourceMetadata(serverUrl, {resourceMetadataUrl});
if (resourceMetadata.authorization_servers && resourceMetadata.authorization_servers.length > 0) {
authorizationServerUrl = resourceMetadata.authorization_servers[0];
}
} catch (error) {
console.warn("Could not load OAuth Protected Resource metadata, falling back to /.well-known/oauth-authorization-server", error)
} catch {
// Ignore errors and fall back to /.well-known/oauth-authorization-server
}
const resource: URL | undefined = await selectResourceURL(serverUrl, provider, resourceMetadata);
const metadata = await discoverOAuthMetadata(authorizationServerUrl);
// Handle client registration if needed
@ -142,6 +153,7 @@ export async function auth(
authorizationCode,
codeVerifier,
redirectUri: provider.redirectUrl,
resource,
});
await provider.saveTokens(tokens);
@ -158,12 +170,13 @@ export async function auth(
metadata,
clientInformation,
refreshToken: tokens.refresh_token,
resource,
});
await provider.saveTokens(newTokens);
return "AUTHORIZED";
} catch (error) {
console.error("Could not refresh OAuth tokens:", error);
} catch {
// Could not refresh OAuth tokens
}
}
@ -176,6 +189,7 @@ export async function auth(
state,
redirectUrl: provider.redirectUrl,
scope: scope || provider.clientMetadata.scope,
resource,
});
await provider.saveCodeVerifier(codeVerifier);
@ -183,6 +197,22 @@ export async function auth(
return "REDIRECT";
}
export async function selectResourceURL(serverUrl: string| URL, provider: OAuthClientProvider, resourceMetadata?: OAuthProtectedResourceMetadata): Promise<URL | undefined> {
let resource = resourceUrlFromServerUrl(serverUrl);
if (provider.validateResourceURL) {
return await provider.validateResourceURL(resource, resourceMetadata?.resource);
} else if (resourceMetadata) {
if (checkResourceAllowed({ requestedResource: resource, configuredResource: resourceMetadata.resource })) {
// If the resource mentioned in metadata is valid, prefer it since it is what the server is telling us to request.
resource = new URL(resourceMetadata.resource);
} else {
throw new Error(`Protected resource ${resourceMetadata.resource} does not match expected ${resource} (or origin)`);
}
}
return resource;
}
/**
* Extract resource_metadata from response header.
*/
@ -195,7 +225,6 @@ export function extractResourceMetadataUrl(res: Response): URL | undefined {
const [type, scheme] = authenticateHeader.split(' ');
if (type.toLowerCase() !== 'bearer' || !scheme) {
console.log("Invalid WWW-Authenticate header format, expected 'Bearer'");
return undefined;
}
const regex = /resource_metadata="([^"]*)"/;
@ -208,7 +237,6 @@ export function extractResourceMetadataUrl(res: Response): URL | undefined {
try {
return new URL(match[1]);
} catch {
console.log("Invalid resource metadata url: ", match[1]);
return undefined;
}
}
@ -265,28 +293,82 @@ export async function discoverOAuthProtectedResourceMetadata(
* If the server returns a 404 for the well-known endpoint, this function will
* return `undefined`. Any other errors will be thrown as exceptions.
*/
/**
* Helper function to handle fetch with CORS retry logic
*/
async function fetchWithCorsRetry(
url: URL,
headers: Record<string, string>,
): Promise<Response> {
try {
return await fetch(url, { headers });
} catch (error) {
// CORS errors come back as TypeError, retry without headers
if (error instanceof TypeError) {
return await fetch(url);
}
throw error;
}
}
/**
* Constructs the well-known path for OAuth metadata discovery
*/
function buildWellKnownPath(pathname: string): string {
let wellKnownPath = `/.well-known/oauth-authorization-server${pathname}`;
if (pathname.endsWith('/')) {
// Strip trailing slash from pathname to avoid double slashes
wellKnownPath = wellKnownPath.slice(0, -1);
}
return wellKnownPath;
}
/**
* Tries to discover OAuth metadata at a specific URL
*/
async function tryMetadataDiscovery(
url: URL,
protocolVersion: string,
): Promise<Response> {
const headers = {
"MCP-Protocol-Version": protocolVersion
};
return await fetchWithCorsRetry(url, headers);
}
/**
* Determines if fallback to root discovery should be attempted
*/
function shouldAttemptFallback(response: Response, pathname: string): boolean {
return response.status === 404 && pathname !== '/';
}
export async function discoverOAuthMetadata(
authorizationServerUrl: string | URL,
opts?: { protocolVersion?: string },
): Promise<OAuthMetadata | undefined> {
const url = new URL("/.well-known/oauth-authorization-server", authorizationServerUrl);
let response: Response;
try {
response = await fetch(url, {
headers: {
"MCP-Protocol-Version": opts?.protocolVersion ?? LATEST_PROTOCOL_VERSION
}
});
} catch (error) {
// CORS errors come back as TypeError
if (error instanceof TypeError) {
response = await fetch(url);
} else {
throw error;
}
}
const issuer = new URL(authorizationServerUrl);
const protocolVersion = opts?.protocolVersion ?? LATEST_PROTOCOL_VERSION;
if (response.status === 404) {
// Try path-aware discovery first (RFC 8414 compliant)
const wellKnownPath = buildWellKnownPath(issuer.pathname);
const pathAwareUrl = new URL(wellKnownPath, issuer);
let response = await tryMetadataDiscovery(pathAwareUrl, protocolVersion);
// If path-aware discovery fails with 404, try fallback to root discovery
if (shouldAttemptFallback(response, issuer.pathname)) {
try {
const rootUrl = new URL("/.well-known/oauth-authorization-server", issuer);
response = await tryMetadataDiscovery(rootUrl, protocolVersion);
if (response.status === 404) {
return undefined;
}
} catch {
// If fallback fails, return undefined
return undefined;
}
} else if (response.status === 404) {
return undefined;
}
@ -310,12 +392,14 @@ export async function startAuthorization(
redirectUrl,
scope,
state,
resource,
}: {
metadata?: OAuthMetadata;
clientInformation: OAuthClientInformation;
redirectUrl: string | URL;
scope?: string;
state?: string;
resource?: URL;
},
): Promise<{ authorizationUrl: URL; codeVerifier: string }> {
const responseType = "code";
@ -365,6 +449,10 @@ export async function startAuthorization(
authorizationUrl.searchParams.set("scope", scope);
}
if (resource) {
authorizationUrl.searchParams.set("resource", resource.href);
}
return { authorizationUrl, codeVerifier };
}
@ -379,12 +467,14 @@ export async function exchangeAuthorization(
authorizationCode,
codeVerifier,
redirectUri,
resource,
}: {
metadata?: OAuthMetadata;
clientInformation: OAuthClientInformation;
authorizationCode: string;
codeVerifier: string;
redirectUri: string | URL;
resource?: URL;
},
): Promise<OAuthTokens> {
const grantType = "authorization_code";
@ -418,6 +508,10 @@ export async function exchangeAuthorization(
params.set("client_secret", clientInformation.client_secret);
}
if (resource) {
params.set("resource", resource.href);
}
const response = await fetch(tokenUrl, {
method: "POST",
headers: {
@ -442,10 +536,12 @@ export async function refreshAuthorization(
metadata,
clientInformation,
refreshToken,
resource,
}: {
metadata?: OAuthMetadata;
clientInformation: OAuthClientInformation;
refreshToken: string;
resource?: URL;
},
): Promise<OAuthTokens> {
const grantType = "refresh_token";
@ -477,6 +573,10 @@ export async function refreshAuthorization(
params.set("client_secret", clientInformation.client_secret);
}
if (resource) {
params.set("resource", resource.href);
}
const response = await fetch(tokenUrl, {
method: "POST",
headers: {

View file

@ -14,6 +14,7 @@ import {
ListToolsRequestSchema,
CallToolRequestSchema,
CreateMessageRequestSchema,
ElicitRequestSchema,
ListRootsRequestSchema,
ErrorCode,
} from "../types.js";
@ -604,6 +605,43 @@ test("should only allow setRequestHandler for declared capabilities", () => {
}).toThrow("Client does not support roots capability");
});
test("should allow setRequestHandler for declared elicitation capability", () => {
const client = new Client(
{
name: "test-client",
version: "1.0.0",
},
{
capabilities: {
elicitation: {},
},
},
);
// This should work because elicitation is a declared capability
expect(() => {
client.setRequestHandler(ElicitRequestSchema, () => ({
action: "accept",
content: {
username: "test-user",
confirmed: true,
},
}));
}).not.toThrow();
// This should throw because sampling is not a declared capability
expect(() => {
client.setRequestHandler(CreateMessageRequestSchema, () => ({
model: "test-model",
role: "assistant",
content: {
type: "text",
text: "Test response",
},
}));
}).toThrow("Client does not support sampling capability");
});
/***
* Test: Type Checking
* Test that custom request/notification/result schemas can be used with the Client class.

View file

@ -307,6 +307,14 @@ export class Client<
}
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(
@ -478,8 +486,8 @@ export class Client<
try {
const validator = this._ajv.compile(tool.outputSchema);
this._cachedToolOutputValidators.set(tool.name, validator);
} catch (error) {
console.warn(`Failed to compile output schema for tool ${tool.name}: ${error}`);
} catch {
// Ignore schema compilation errors
}
}
}

View file

@ -398,7 +398,7 @@ describe("SSEClientTransport", () => {
'Content-Type': 'application/json',
})
.end(JSON.stringify({
resource: "https://resource.example.com",
resource: resourceBaseUrl.href,
authorization_servers: [`${authBaseUrl}`],
}));
return;
@ -450,7 +450,7 @@ describe("SSEClientTransport", () => {
'Content-Type': 'application/json',
})
.end(JSON.stringify({
resource: "https://resource.example.com",
resource: resourceBaseUrl.href,
authorization_servers: [`${authBaseUrl}`],
}));
return;
@ -601,7 +601,7 @@ describe("SSEClientTransport", () => {
'Content-Type': 'application/json',
})
.end(JSON.stringify({
resource: "https://resource.example.com",
resource: resourceBaseUrl.href,
authorization_servers: [`${authBaseUrl}`],
}));
return;
@ -723,7 +723,7 @@ describe("SSEClientTransport", () => {
'Content-Type': 'application/json',
})
.end(JSON.stringify({
resource: "https://resource.example.com",
resource: resourceBaseUrl.href,
authorization_servers: [`${authBaseUrl}`],
}));
return;
@ -851,7 +851,7 @@ describe("SSEClientTransport", () => {
'Content-Type': 'application/json',
})
.end(JSON.stringify({
resource: "https://resource.example.com",
resource: resourceBaseUrl.href,
authorization_servers: [`${authBaseUrl}`],
}));
return;

View file

@ -117,23 +117,35 @@ export class SSEClientTransport implements Transport {
}
private _startOrAuth(): Promise<void> {
const fetchImpl = (this?._eventSourceInit?.fetch || fetch) as typeof fetch
return new Promise((resolve, reject) => {
this._eventSource = new EventSource(
this._url.href,
this._eventSourceInit ?? {
fetch: (url, init) => this._commonHeaders().then((headers) => fetch(url, {
...init,
headers: {
...headers,
Accept: "text/event-stream"
{
...this._eventSourceInit,
fetch: async (url, init) => {
const headers = await this._commonHeaders()
const response = await fetchImpl(url, {
...init,
headers: new Headers({
...headers,
Accept: "text/event-stream"
})
})
if (response.status === 401 && response.headers.has('www-authenticate')) {
this._resourceMetadataUrl = extractResourceMetadataUrl(response);
}
})),
return response
},
},
);
this._abortController = new AbortController();
this._eventSource.onerror = (event) => {
if (event.code === 401 && this._authProvider) {
this._authThenStart().then(resolve, reject);
return;
}

View file

@ -76,6 +76,9 @@ npx tsx src/examples/server/simpleStreamableHttp.ts
# To add a demo of authentication to this example, use:
npx tsx src/examples/server/simpleStreamableHttp.ts --oauth
# To mitigate impersonation risks, enable strict Resource Identifier verification:
npx tsx src/examples/server/simpleStreamableHttp.ts --oauth --oauth-strict
```
##### JSON Response Mode Server

View file

@ -14,11 +14,13 @@ import {
ListResourcesResultSchema,
LoggingMessageNotificationSchema,
ResourceListChangedNotificationSchema,
ElicitRequestSchema,
ResourceLink,
ReadResourceRequest,
ReadResourceResultSchema,
ResourceLink,
} from '../../types.js';
import { getDisplayName } from '../../shared/metadataUtils.js';
import Ajv from "ajv";
// Create readline interface for user input
const readline = createInterface({
@ -58,6 +60,7 @@ function printHelp(): void {
console.log(' call-tool <name> [args] - Call a tool with optional JSON arguments');
console.log(' greet [name] - Call the greet tool');
console.log(' multi-greet [name] - Call the multi-greet tool with notifications');
console.log(' collect-info [type] - Test elicitation with collect-user-info tool (contact/preferences/feedback)');
console.log(' start-notifications [interval] [count] - Start periodic notifications');
console.log(' run-notifications-tool-with-resumability [interval] [count] - Run notification tool with resumability');
console.log(' list-prompts - List available prompts');
@ -120,6 +123,10 @@ function commandLoop(): void {
await callMultiGreetTool(args[1] || 'MCP User');
break;
case 'collect-info':
await callCollectInfoTool(args[1] || 'contact');
break;
case 'start-notifications': {
const interval = args[1] ? parseInt(args[1], 10) : 2000;
const count = args[2] ? parseInt(args[2], 10) : 10;
@ -204,15 +211,212 @@ async function connect(url?: string): Promise<void> {
console.log(`Connecting to ${serverUrl}...`);
try {
// Create a new client
// Create a new client with elicitation capability
client = new Client({
name: 'example-client',
version: '1.0.0'
}, {
capabilities: {
elicitation: {},
},
});
client.onerror = (error) => {
console.error('\x1b[31mClient error:', error, '\x1b[0m');
}
// Set up elicitation request handler with proper validation
client.setRequestHandler(ElicitRequestSchema, async (request) => {
console.log('\n🔔 Elicitation Request Received:');
console.log(`Message: ${request.params.message}`);
console.log('Requested Schema:');
console.log(JSON.stringify(request.params.requestedSchema, null, 2));
const schema = request.params.requestedSchema;
const properties = schema.properties;
const required = schema.required || [];
// Set up AJV validator for the requested schema
const ajv = new Ajv();
const validate = ajv.compile(schema);
let attempts = 0;
const maxAttempts = 3;
while (attempts < maxAttempts) {
attempts++;
console.log(`\nPlease provide the following information (attempt ${attempts}/${maxAttempts}):`);
const content: Record<string, unknown> = {};
let inputCancelled = false;
// Collect input for each field
for (const [fieldName, fieldSchema] of Object.entries(properties)) {
const field = fieldSchema as {
type?: string;
title?: string;
description?: string;
default?: unknown;
enum?: string[];
minimum?: number;
maximum?: number;
minLength?: number;
maxLength?: number;
format?: string;
};
const isRequired = required.includes(fieldName);
let prompt = `${field.title || fieldName}`;
// Add helpful information to the prompt
if (field.description) {
prompt += ` (${field.description})`;
}
if (field.enum) {
prompt += ` [options: ${field.enum.join(', ')}]`;
}
if (field.type === 'number' || field.type === 'integer') {
if (field.minimum !== undefined && field.maximum !== undefined) {
prompt += ` [${field.minimum}-${field.maximum}]`;
} else if (field.minimum !== undefined) {
prompt += ` [min: ${field.minimum}]`;
} else if (field.maximum !== undefined) {
prompt += ` [max: ${field.maximum}]`;
}
}
if (field.type === 'string' && field.format) {
prompt += ` [format: ${field.format}]`;
}
if (isRequired) {
prompt += ' *required*';
}
if (field.default !== undefined) {
prompt += ` [default: ${field.default}]`;
}
prompt += ': ';
const answer = await new Promise<string>((resolve) => {
readline.question(prompt, (input) => {
resolve(input.trim());
});
});
// Check for cancellation
if (answer.toLowerCase() === 'cancel' || answer.toLowerCase() === 'c') {
inputCancelled = true;
break;
}
// Parse and validate the input
try {
if (answer === '' && field.default !== undefined) {
content[fieldName] = field.default;
} else if (answer === '' && !isRequired) {
// Skip optional empty fields
continue;
} else if (answer === '') {
throw new Error(`${fieldName} is required`);
} else {
// Parse the value based on type
let parsedValue: unknown;
if (field.type === 'boolean') {
parsedValue = answer.toLowerCase() === 'true' || answer.toLowerCase() === 'yes' || answer === '1';
} else if (field.type === 'number') {
parsedValue = parseFloat(answer);
if (isNaN(parsedValue as number)) {
throw new Error(`${fieldName} must be a valid number`);
}
} else if (field.type === 'integer') {
parsedValue = parseInt(answer, 10);
if (isNaN(parsedValue as number)) {
throw new Error(`${fieldName} must be a valid integer`);
}
} else if (field.enum) {
if (!field.enum.includes(answer)) {
throw new Error(`${fieldName} must be one of: ${field.enum.join(', ')}`);
}
parsedValue = answer;
} else {
parsedValue = answer;
}
content[fieldName] = parsedValue;
}
} catch (error) {
console.log(`❌ Error: ${error}`);
// Continue to next attempt
break;
}
}
if (inputCancelled) {
return { action: 'cancel' };
}
// If we didn't complete all fields due to an error, try again
if (Object.keys(content).length !== Object.keys(properties).filter(name =>
required.includes(name) || content[name] !== undefined
).length) {
if (attempts < maxAttempts) {
console.log('Please try again...');
continue;
} else {
console.log('Maximum attempts reached. Declining request.');
return { action: 'reject' };
}
}
// Validate the complete object against the schema
const isValid = validate(content);
if (!isValid) {
console.log('❌ Validation errors:');
validate.errors?.forEach(error => {
console.log(` - ${error.dataPath || 'root'}: ${error.message}`);
});
if (attempts < maxAttempts) {
console.log('Please correct the errors and try again...');
continue;
} else {
console.log('Maximum attempts reached. Declining request.');
return { action: 'reject' };
}
}
// Show the collected data and ask for confirmation
console.log('\n✅ Collected data:');
console.log(JSON.stringify(content, null, 2));
const confirmAnswer = await new Promise<string>((resolve) => {
readline.question('\nSubmit this information? (yes/no/cancel): ', (input) => {
resolve(input.trim().toLowerCase());
});
});
if (confirmAnswer === 'yes' || confirmAnswer === 'y') {
return {
action: 'accept',
content,
};
} else if (confirmAnswer === 'cancel' || confirmAnswer === 'c') {
return { action: 'cancel' };
} else if (confirmAnswer === 'no' || confirmAnswer === 'n') {
if (attempts < maxAttempts) {
console.log('Please re-enter the information...');
continue;
} else {
return { action: 'reject' };
}
}
}
console.log('Maximum attempts reached. Declining request.');
return { action: 'reject' };
});
transport = new StreamableHTTPClientTransport(
new URL(serverUrl),
{
@ -358,7 +562,7 @@ async function callTool(name: string, args: Record<string, unknown>): Promise<vo
console.log('Tool result:');
const resourceLinks: ResourceLink[] = [];
result.content.forEach(item => {
if (item.type === 'text') {
console.log(` ${item.text}`);
@ -383,7 +587,7 @@ async function callTool(name: string, args: Record<string, unknown>): Promise<vo
console.log(` [Unknown content type]:`, item);
}
});
// Offer to read resource links
if (resourceLinks.length > 0) {
console.log(`\nFound ${resourceLinks.length} resource link(s). Use 'read-resource <uri>' to read their content.`);
@ -403,6 +607,11 @@ async function callMultiGreetTool(name: string): Promise<void> {
await callTool('multi-greet', { name });
}
async function callCollectInfoTool(infoType: string): Promise<void> {
console.log(`Testing elicitation with collect-user-info tool (${infoType})...`);
await callTool('collect-user-info', { infoType });
}
async function startNotifications(interval: number, count: number): Promise<void> {
console.log(`Starting notification stream: interval=${interval}ms, count=${count || 'unlimited'}`);
await callTool('start-notification-stream', { interval, count });
@ -546,7 +755,7 @@ async function readResource(uri: string): Promise<void> {
if (content.mimeType) {
console.log(` Type: ${content.mimeType}`);
}
if ('text' in content && typeof content.text === 'string') {
console.log(' Content:');
console.log(' ---');

View file

@ -1,10 +1,11 @@
import { randomUUID } from 'node:crypto';
import { AuthorizationParams, OAuthServerProvider } from '../../server/auth/provider.js';
import { OAuthRegisteredClientsStore } from '../../server/auth/clients.js';
import { OAuthClientInformationFull, OAuthMetadata, OAuthTokens } from 'src/shared/auth.js';
import { OAuthClientInformationFull, OAuthMetadata, OAuthTokens } from '../../shared/auth.js';
import express, { Request, Response } from "express";
import { AuthInfo } from 'src/server/auth/types.js';
import { createOAuthMetadata, mcpAuthRouter } from 'src/server/auth/router.js';
import { AuthInfo } from '../../server/auth/types.js';
import { createOAuthMetadata, mcpAuthRouter } from '../../server/auth/router.js';
import { resourceUrlFromServerUrl } from '../../shared/auth-utils.js';
export class DemoInMemoryClientsStore implements OAuthRegisteredClientsStore {
@ -35,6 +36,8 @@ export class DemoInMemoryAuthProvider implements OAuthServerProvider {
client: OAuthClientInformationFull}>();
private tokens = new Map<string, AuthInfo>();
constructor(private validateResource?: (resource?: URL) => boolean) {}
async authorize(
client: OAuthClientInformationFull,
params: AuthorizationParams,
@ -89,6 +92,10 @@ export class DemoInMemoryAuthProvider implements OAuthServerProvider {
throw new Error(`Authorization code was not issued to this client, ${codeData.client.client_id} != ${client.client_id}`);
}
if (this.validateResource && !this.validateResource(codeData.params.resource)) {
throw new Error(`Invalid resource: ${codeData.params.resource}`);
}
this.codes.delete(authorizationCode);
const token = randomUUID();
@ -97,7 +104,8 @@ export class DemoInMemoryAuthProvider implements OAuthServerProvider {
clientId: client.client_id,
scopes: codeData.params.scopes || [],
expiresAt: Date.now() + 3600000, // 1 hour
type: 'access'
resource: codeData.params.resource,
type: 'access',
};
this.tokens.set(token, tokenData);
@ -113,7 +121,8 @@ export class DemoInMemoryAuthProvider implements OAuthServerProvider {
async exchangeRefreshToken(
_client: OAuthClientInformationFull,
_refreshToken: string,
_scopes?: string[]
_scopes?: string[],
_resource?: URL
): Promise<OAuthTokens> {
throw new Error('Not implemented for example demo');
}
@ -129,18 +138,26 @@ export class DemoInMemoryAuthProvider implements OAuthServerProvider {
clientId: tokenData.clientId,
scopes: tokenData.scopes,
expiresAt: Math.floor(tokenData.expiresAt / 1000),
resource: tokenData.resource,
};
}
}
export const setupAuthServer = (authServerUrl: URL): OAuthMetadata => {
export const setupAuthServer = ({authServerUrl, mcpServerUrl, strictResource}: {authServerUrl: URL, mcpServerUrl: URL, strictResource: boolean}): OAuthMetadata => {
// Create separate auth server app
// NOTE: This is a separate app on a separate port to illustrate
// how to separate an OAuth Authorization Server from a Resource
// server in the SDK. The SDK is not intended to be provide a standalone
// authorization server.
const provider = new DemoInMemoryAuthProvider();
const validateResource = strictResource ? (resource?: URL) => {
if (!resource) return false;
const expectedResource = resourceUrlFromServerUrl(mcpServerUrl);
return resource.toString() === expectedResource.toString();
} : undefined;
const provider = new DemoInMemoryAuthProvider(validateResource);
const authApp = express();
authApp.use(express.json());
// For introspection requests
@ -168,7 +185,8 @@ export const setupAuthServer = (authServerUrl: URL): OAuthMetadata => {
active: true,
client_id: tokenInfo.clientId,
scope: tokenInfo.scopes.join(' '),
exp: tokenInfo.expiresAt
exp: tokenInfo.expiresAt,
aud: tokenInfo.resource,
});
return
} catch (error) {

View file

@ -5,13 +5,15 @@ import { McpServer } from '../../server/mcp.js';
import { StreamableHTTPServerTransport } from '../../server/streamableHttp.js';
import { getOAuthProtectedResourceMetadataUrl, mcpAuthMetadataRouter } from '../../server/auth/router.js';
import { requireBearerAuth } from '../../server/auth/middleware/bearerAuth.js';
import { CallToolResult, GetPromptResult, isInitializeRequest, ReadResourceResult, ResourceLink } from '../../types.js';
import { CallToolResult, GetPromptResult, isInitializeRequest, PrimitiveSchemaDefinition, ReadResourceResult, ResourceLink } from '../../types.js';
import { InMemoryEventStore } from '../shared/inMemoryEventStore.js';
import { setupAuthServer } from './demoInMemoryOAuthProvider.js';
import { OAuthMetadata } from 'src/shared/auth.js';
import { checkResourceAllowed } from 'src/shared/auth-utils.js';
// Check for OAuth flag
const useOAuth = process.argv.includes('--oauth');
const strictOAuth = process.argv.includes('--oauth-strict');
// Create an MCP server with implementation details
const getServer = () => {
@ -86,6 +88,155 @@ const getServer = () => {
};
}
);
// Register a tool that demonstrates elicitation (user input collection)
// This creates a closure that captures the server instance
server.tool(
'collect-user-info',
'A tool that collects user information through elicitation',
{
infoType: z.enum(['contact', 'preferences', 'feedback']).describe('Type of information to collect'),
},
async ({ infoType }): Promise<CallToolResult> => {
let message: string;
let requestedSchema: {
type: 'object';
properties: Record<string, PrimitiveSchemaDefinition>;
required?: string[];
};
switch (infoType) {
case 'contact':
message = 'Please provide your contact information';
requestedSchema = {
type: 'object',
properties: {
name: {
type: 'string',
title: 'Full Name',
description: 'Your full name',
},
email: {
type: 'string',
title: 'Email Address',
description: 'Your email address',
format: 'email',
},
phone: {
type: 'string',
title: 'Phone Number',
description: 'Your phone number (optional)',
},
},
required: ['name', 'email'],
};
break;
case 'preferences':
message = 'Please set your preferences';
requestedSchema = {
type: 'object',
properties: {
theme: {
type: 'string',
title: 'Theme',
description: 'Choose your preferred theme',
enum: ['light', 'dark', 'auto'],
enumNames: ['Light', 'Dark', 'Auto'],
},
notifications: {
type: 'boolean',
title: 'Enable Notifications',
description: 'Would you like to receive notifications?',
default: true,
},
frequency: {
type: 'string',
title: 'Notification Frequency',
description: 'How often would you like notifications?',
enum: ['daily', 'weekly', 'monthly'],
enumNames: ['Daily', 'Weekly', 'Monthly'],
},
},
required: ['theme'],
};
break;
case 'feedback':
message = 'Please provide your feedback';
requestedSchema = {
type: 'object',
properties: {
rating: {
type: 'integer',
title: 'Rating',
description: 'Rate your experience (1-5)',
minimum: 1,
maximum: 5,
},
comments: {
type: 'string',
title: 'Comments',
description: 'Additional comments (optional)',
maxLength: 500,
},
recommend: {
type: 'boolean',
title: 'Would you recommend this?',
description: 'Would you recommend this to others?',
},
},
required: ['rating', 'recommend'],
};
break;
default:
throw new Error(`Unknown info type: ${infoType}`);
}
try {
// Use the underlying server instance to elicit input from the client
const result = await server.server.elicitInput({
message,
requestedSchema,
});
if (result.action === 'accept') {
return {
content: [
{
type: 'text',
text: `Thank you! Collected ${infoType} information: ${JSON.stringify(result.content, null, 2)}`,
},
],
};
} else if (result.action === 'reject') {
return {
content: [
{
type: 'text',
text: `No information was collected. User rejected ${infoType} information request.`,
},
],
};
} else {
return {
content: [
{
type: 'text',
text: `Information collection was cancelled by the user.`,
},
],
};
}
} catch (error) {
return {
content: [
{
type: 'text',
text: `Error collecting ${infoType} information: ${error}`,
},
],
};
}
}
);
// Register a simple prompt with title
server.registerPrompt(
@ -178,10 +329,10 @@ const getServer = () => {
server.registerResource(
'example-file-1',
'file:///example/file1.txt',
{
{
title: 'Example File 1',
description: 'First example file for ResourceLink demonstration',
mimeType: 'text/plain'
mimeType: 'text/plain'
},
async (): Promise<ReadResourceResult> => {
return {
@ -198,10 +349,10 @@ const getServer = () => {
server.registerResource(
'example-file-2',
'file:///example/file2.txt',
{
{
title: 'Example File 2',
description: 'Second example file for ResourceLink demonstration',
mimeType: 'text/plain'
mimeType: 'text/plain'
},
async (): Promise<ReadResourceResult> => {
return {
@ -279,10 +430,10 @@ app.use(express.json());
let authMiddleware = null;
if (useOAuth) {
// Create auth middleware for MCP endpoints
const mcpServerUrl = new URL(`http://localhost:${MCP_PORT}`);
const mcpServerUrl = new URL(`http://localhost:${MCP_PORT}/mcp`);
const authServerUrl = new URL(`http://localhost:${AUTH_PORT}`);
const oauthMetadata: OAuthMetadata = setupAuthServer(authServerUrl);
const oauthMetadata: OAuthMetadata = setupAuthServer({authServerUrl, mcpServerUrl, strictResource: strictOAuth});
const tokenVerifier = {
verifyAccessToken: async (token: string) => {
@ -309,6 +460,15 @@ if (useOAuth) {
const data = await response.json();
if (strictOAuth) {
if (!data.aud) {
throw new Error(`Resource Indicator (RFC8707) missing`);
}
if (!checkResourceAllowed({ requestedResource: data.aud, configuredResource: mcpServerUrl })) {
throw new Error(`Expected resource indicator ${mcpServerUrl}, got: ${data.aud}`);
}
}
// Convert the response to AuthInfo format
return {
token,
@ -328,7 +488,7 @@ if (useOAuth) {
authMiddleware = requireBearerAuth({
verifier: tokenVerifier,
requiredScopes: ['mcp:tools'],
requiredScopes: [],
resourceMetadataUrl: getOAuthProtectedResourceMetadataUrl(mcpServerUrl),
});
}

View file

@ -5,7 +5,7 @@ import { Client } from '../client/index.js';
import { StreamableHTTPClientTransport } from '../client/streamableHttp.js';
import { McpServer } from '../server/mcp.js';
import { StreamableHTTPServerTransport } from '../server/streamableHttp.js';
import { CallToolResultSchema, ListToolsResultSchema, ListResourcesResultSchema, ListPromptsResultSchema, DEFAULT_NEGOTIATED_PROTOCOL_VERSION } from '../types.js';
import { CallToolResultSchema, ListToolsResultSchema, ListResourcesResultSchema, ListPromptsResultSchema, LATEST_PROTOCOL_VERSION } from '../types.js';
import { z } from 'zod';
describe('Streamable HTTP Transport Session Management', () => {
@ -145,7 +145,7 @@ describe('Streamable HTTP Transport Session Management', () => {
params: {}
}, ListToolsResultSchema);
});
it('should operate without session management', async () => {
// Create and connect a client
@ -220,15 +220,15 @@ describe('Streamable HTTP Transport Session Management', () => {
});
const transport = new StreamableHTTPClientTransport(baseUrl);
// Verify protocol version is not set before connecting
expect(transport.protocolVersion).toBeUndefined();
await client.connect(transport);
// Verify protocol version is set after connecting
expect(transport.protocolVersion).toBe(DEFAULT_NEGOTIATED_PROTOCOL_VERSION);
expect(transport.protocolVersion).toBe(LATEST_PROTOCOL_VERSION);
// Clean up
await transport.close();
});

View file

@ -276,6 +276,34 @@ describe('Authorization Handler', () => {
});
});
describe('Resource parameter validation', () => {
it('propagates resource parameter', async () => {
const mockProviderWithResource = jest.spyOn(mockProvider, 'authorize');
const response = await supertest(app)
.get('/authorize')
.query({
client_id: 'valid-client',
redirect_uri: 'https://example.com/callback',
response_type: 'code',
code_challenge: 'challenge123',
code_challenge_method: 'S256',
resource: 'https://api.example.com/resource'
});
expect(response.status).toBe(302);
expect(mockProviderWithResource).toHaveBeenCalledWith(
validClient,
expect.objectContaining({
resource: new URL('https://api.example.com/resource'),
redirectUri: 'https://example.com/callback',
codeChallenge: 'challenge123'
}),
expect.any(Object)
);
});
});
describe('Successful authorization', () => {
it('handles successful authorization with all parameters', async () => {
const response = await supertest(app)

View file

@ -35,6 +35,7 @@ const RequestAuthorizationParamsSchema = z.object({
code_challenge_method: z.literal("S256"),
scope: z.string().optional(),
state: z.string().optional(),
resource: z.string().url().optional(),
});
export function authorizationHandler({ provider, rateLimit: rateLimitConfig }: AuthorizationHandlerOptions): RequestHandler {
@ -98,7 +99,6 @@ export function authorizationHandler({ provider, rateLimit: rateLimitConfig }: A
const status = error instanceof ServerError ? 500 : 400;
res.status(status).json(error.toResponseObject());
} else {
console.error("Unexpected error looking up client:", error);
const serverError = new ServerError("Internal Server Error");
res.status(500).json(serverError.toResponseObject());
}
@ -115,7 +115,7 @@ export function authorizationHandler({ provider, rateLimit: rateLimitConfig }: A
throw new InvalidRequestError(parseResult.error.message);
}
const { scope, code_challenge } = parseResult.data;
const { scope, code_challenge, resource } = parseResult.data;
state = parseResult.data.state;
// Validate scopes
@ -138,13 +138,13 @@ export function authorizationHandler({ provider, rateLimit: rateLimitConfig }: A
scopes: requestedScopes,
redirectUri: redirect_uri,
codeChallenge: code_challenge,
resource: resource ? new URL(resource) : undefined,
}, res);
} catch (error) {
// Post-redirect errors - redirect with error parameters
if (error instanceof OAuthError) {
res.redirect(302, createErrorRedirect(redirect_uri, error, state));
} else {
console.error("Unexpected error during authorization:", error);
const serverError = new ServerError("Internal Server Error");
res.redirect(302, createErrorRedirect(redirect_uri, serverError, state));
}

View file

@ -104,7 +104,6 @@ export function clientRegistrationHandler({
const status = error instanceof ServerError ? 500 : 400;
res.status(status).json(error.toResponseObject());
} else {
console.error("Unexpected error registering client:", error);
const serverError = new ServerError("Internal Server Error");
res.status(500).json(serverError.toResponseObject());
}

View file

@ -9,7 +9,7 @@ import {
InvalidRequestError,
ServerError,
TooManyRequestsError,
OAuthError
OAuthError,
} from "../errors.js";
export type RevocationHandlerOptions = {
@ -21,7 +21,10 @@ export type RevocationHandlerOptions = {
rateLimit?: Partial<RateLimitOptions> | false;
};
export function revocationHandler({ provider, rateLimit: rateLimitConfig }: RevocationHandlerOptions): RequestHandler {
export function revocationHandler({
provider,
rateLimit: rateLimitConfig,
}: RevocationHandlerOptions): RequestHandler {
if (!provider.revokeToken) {
throw new Error("Auth provider does not support revoking tokens");
}
@ -37,21 +40,25 @@ export function revocationHandler({ provider, rateLimit: rateLimitConfig }: Revo
// Apply rate limiting unless explicitly disabled
if (rateLimitConfig !== false) {
router.use(rateLimit({
windowMs: 15 * 60 * 1000, // 15 minutes
max: 50, // 50 requests per windowMs
standardHeaders: true,
legacyHeaders: false,
message: new TooManyRequestsError('You have exceeded the rate limit for token revocation requests').toResponseObject(),
...rateLimitConfig
}));
router.use(
rateLimit({
windowMs: 15 * 60 * 1000, // 15 minutes
max: 50, // 50 requests per windowMs
standardHeaders: true,
legacyHeaders: false,
message: new TooManyRequestsError(
"You have exceeded the rate limit for token revocation requests"
).toResponseObject(),
...rateLimitConfig,
})
);
}
// Authenticate and extract client details
router.use(authenticateClient({ clientsStore: provider.clientsStore }));
router.post("/", async (req, res) => {
res.setHeader('Cache-Control', 'no-store');
res.setHeader("Cache-Control", "no-store");
try {
const parseResult = OAuthTokenRevocationRequestSchema.safeParse(req.body);
@ -62,7 +69,6 @@ export function revocationHandler({ provider, rateLimit: rateLimitConfig }: Revo
const client = req.client;
if (!client) {
// This should never happen
console.error("Missing client information after authentication");
throw new ServerError("Internal Server Error");
}
@ -73,7 +79,6 @@ export function revocationHandler({ provider, rateLimit: rateLimitConfig }: Revo
const status = error instanceof ServerError ? 500 : 400;
res.status(status).json(error.toResponseObject());
} else {
console.error("Unexpected error revoking token:", error);
const serverError = new ServerError("Internal Server Error");
res.status(500).json(serverError.toResponseObject());
}

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