4 Releases published by 2 people

• 1.17.1

  published Jul 31, 2025

• 1.17.2

  published Aug 7, 2025

• 1.17.3

  published Aug 14, 2025

• 1.17.4

  published Aug 21, 2025

14 Pull requests merged by 11 people

• chore: bump version to 1.17.4

  #894 merged Aug 21, 2025

• [auth] OAuth protected-resource-metadata: fallback on 4xx not just 404

  #879 merged Aug 19, 2025

• restrict url schemes allowed in oauth metadata

  #877 merged Aug 19, 2025

• feature(middleware): Composable fetch middleware for auth and cross‑cutting concerns

  #485 merged Aug 18, 2025

• version: patch to 0.17.3

  #878 merged Aug 14, 2025

• docs: correct parameter schema key in Dynamic Servers documentation

  #789 merged Aug 14, 2025

• fix: pass fetchfn parameter to registerClient and refreshAuthorizatio…

  #850 merged Aug 14, 2025

• fix: client import & server imports

  #851 merged Aug 12, 2025

• Fix quit command in Example client with OAuth

  #864 merged Aug 11, 2025

• 1.17.2

  #855 merged Aug 7, 2025

• fix: retry next endpoint on CORS error during auth server discovery

  #827 merged Aug 4, 2025

• 1.17.1

  #831 merged Jul 31, 2025

• fix: prevent responses being sent to wrong client when multiple transports connect

  #820 merged Jul 29, 2025

• (fix): Update fallbackRequestHandler type to match _requestHandlers leaves type

  #784 merged Jul 29, 2025

29 Pull requests opened by 26 people

• `registerTool`: accept ZodType<object> for input and output schema

  #816 opened Jul 28, 2025

• Ensure stdio client closes underlying process

  #818 opened Jul 29, 2025

• feat: Add custom context support for MCP transports

  #819 opened Jul 29, 2025

• fix(stdio): implement graceful shutdown as per spec

  #821 opened Jul 29, 2025

• Make README formatting more consistent

  #826 opened Jul 30, 2025

• fix: preserve canonical URL format in OAuth resource parameter per MCP auth spec

  #829 opened Jul 31, 2025

• Fix connection closure handling in Protocol and InMemoryTransport

  #833 opened Aug 2, 2025

• [prototype] add example implementation of client id metadata documents (SEP-991)

  #839 opened Aug 4, 2025

• Group/Tag Filtering Implementation

  #840 opened Aug 4, 2025

• fix: Replace non-standard `enumNames` with standard `oneOf` in `EnumSchema`

  #844 opened Aug 5, 2025

• fix: typo in comment in ResourceTemplate class

  #845 opened Aug 5, 2025

• feat: add optional strict parameter to registerTool for Zod validation

  #846 opened Aug 5, 2025

• feat: add bulk registration methods for tools, resources, and prompts

  #847 opened Aug 5, 2025

• Fix [mcp client times out after 60 seconds (ignoring timeout option) #245]

  #849 opened Aug 6, 2025

• fix: normalize headers in sse transport

  #856 opened Aug 7, 2025

• fix(auth-router): correct Protected Resource Metadata for pathful RS and add explicit resourceServerUrl (RFC 9728)

  #858 opened Aug 8, 2025

• Type generics for CallToolResult - Require 'structuredContent' if 'outputSchema' defined.

  #859 opened Aug 10, 2025

• feat: zod v4

  #869 opened Aug 12, 2025

• Fix: Barrel file exports

  #870 opened Aug 12, 2025

• feat: use informative user agent in HTTP requests

  #872 opened Aug 12, 2025

• Feat: Add RFC 7523 (JWT Bearer Grant) support

  #875 opened Aug 14, 2025

• Fix double onerror trigger on client.close() (Streamable HTTP)

  #880 opened Aug 15, 2025

• Automatic handling of logging level

  #882 opened Aug 18, 2025

• Implement protocol-level sessions for TypeScript SDK

  #888 opened Aug 20, 2025

• chore: drop `raw-body` dependency

  #889 opened Aug 20, 2025

• fix: client initial GET sse include requestInit (modelcontextprotocol#895)

  #896 opened Aug 22, 2025

• apply requestInit to SSE GET in StreamableHTTP transport 895 problem

  #897 opened Aug 22, 2025

• Implementation of SEP-986: Specify Format for Tool Names

  #900 opened Aug 22, 2025

• fix: Add Accept header to auth metadata request

  #901 opened Aug 25, 2025

8 Issues closed by 8 people

• Error occurs in Windsurf when registering tool with input schema

  #800 closed Aug 23, 2025

• StdioClientTransport.close() doesn't terminate child processes, causing memory leaks

  #885 closed Aug 20, 2025

• `sampling/createMessage` get -32601: Method not found

  #738 closed Aug 17, 2025

• Workarounds Required to Support Microsoft Azure as Auth Server

  #862 closed Aug 12, 2025

• Cannot find module @modelcontextprotocol\sdk\dist\cjs\types

  #838 closed Aug 8, 2025

• Unable to use async callbacks for tools/resources with Streamable HTTP transport.

  #848 closed Aug 8, 2025

• MCP inspector tool do not have option to add input in Streamable HTTP mode

  #835 closed Aug 3, 2025

• Can't define inputSchema as a primitive; prevents ChatGPT connector usage(?)

  #815 closed Jul 28, 2025

36 Issues opened by 36 people

• OAuthClientProvider should support the client_credentials authorization flow

  #899 opened Aug 22, 2025

• Feature Request: Add ability to unregister/deregister tools at runtime in TypeScript SDK

  #898 opened Aug 22, 2025

• SSE client doesn't include requestInit config in GET text/eventstream to start SSE/auth

  #895 opened Aug 22, 2025

• McpServer re-registers capabilities after connect, blocking dynamic registration even when capabilities were supplied at construction

  #893 opened Aug 21, 2025

• Issue: No Reliable Mapping Between sessionId and streamId for Stateless Resumability

  #892 opened Aug 21, 2025

• inputSchema with ZodRawShape

  #891 opened Aug 20, 2025

• Hope to provide a UMD format output

  #887 opened Aug 20, 2025

• Request guidance/feature to stream streaming tool responses back

  #886 opened Aug 19, 2025

• RegisteredTool.update() seems not update outoutSchema

  #884 opened Aug 19, 2025

• Allow custom hostnames for development environments beyond localhost

  #883 opened Aug 19, 2025

• Arshan Solution

  #881 opened Aug 17, 2025

• sse timeout set dont work & always close after 5mins

  #876 opened Aug 14, 2025

• [DOCS] - DIVERGENCES BETWEEN README.md and simpleStatelessStremablehttp.js example

  #874 opened Aug 13, 2025

• Claude.ai MCP Authentication Issue - Web UI Bug Report

  #873 opened Aug 13, 2025

• Implement a default `SetLevelRequestSchema` handler

  #871 opened Aug 12, 2025

• When executing client.close(), onerror will be executed twice (Streamable HTTP)

  #868 opened Aug 12, 2025

• Incompatible dependency: breaks Node 18 support

  #867 opened Aug 12, 2025

• Notifications with StreamableHTTPServerTransport and enableJsonResponse = true

  #866 opened Aug 12, 2025

• PRM endpoint incorrectly configured

  #865 opened Aug 11, 2025

• StreamableHTTPClientTransport is not implementing Transport properly

  #861 opened Aug 10, 2025

• Inconsistent `resource_metadata` handling between C# and TypeScript MCP SDKs

  #860 opened Aug 10, 2025

• [Sampling/Elicitation] Stateless servers silently failing on session-requiring features

  #857 opened Aug 8, 2025

• Add Docs

  #854 opened Aug 7, 2025

• Missing session reuse in browser: client.connect ignores mcp-session-id

  #852 opened Aug 7, 2025

• Horizontal Scalability for stateful streamable HTTP

  #843 opened Aug 5, 2025

• Bulk tool registration causes EventEmitter memory leak warnings

  #842 opened Aug 5, 2025

• typing structuredContent indirectly causes type error

  #837 opened Aug 4, 2025

• Dynamic Tool Registration Based on Authentication Context

  #836 opened Aug 3, 2025

• Version negotiation is skipped for initialization request

  #834 opened Aug 2, 2025

• Azure OIDC discovery metadata missing code_challenge_methods_supported breaks S256 PKCE validation

  #832 opened Aug 1, 2025

• Need to handle GET and POST differently in OAuthServerProvider.authorize handler

  #830 opened Jul 31, 2025

• Use Typebox as inputSchema or outputSchema

  #825 opened Jul 30, 2025

• The return type of Client.callTool() incorrectly specifies `content` as `unknown`

  #823 opened Jul 30, 2025

• RFC 8414 Compliance

  #822 opened Jul 30, 2025

• Package attaches process signal handlers

  #817 opened Jul 28, 2025

• next.js应用，通过server actions使用StdioClientTransport连接mcp server， listTools()正常，但是callTool超时

  #814 opened Jul 27, 2025

24 Unresolved conversations

Sometimes conversations happen on old items that aren’t yet closed. Here is a list of all the Issues and Pull Requests with unresolved conversations.

• Ensuring stdio transport closure despite server hanging. Fixing #271

  #314 commented on Aug 14, 2025 • 2 new comments

• feat: add multi-level initial access token support for OAuth 2.0 Dynamic Client Registration (RFC 7591)

  #773 commented on Aug 22, 2025 • 1 new comment

• Import Node.js APIs with `node:` prefix

  #349 commented on Aug 19, 2025 • 1 new comment

• optimization: When using custom SSE request,`Authorization` header can still be automatically attached to the SSE request.

  #478 commented on Aug 7, 2025 • 0 new comments

• Added auto-refreshing tool list notification handler to client

  #239 commented on Aug 21, 2025 • 0 new comments

• Zod 4 supported

  #555 commented on Aug 24, 2025 • 0 new comments

• Tool `inputSchema` and `outputSchema` do not support JSON Schema

  #685 commented on Aug 22, 2025 • 0 new comments

• Fastify support or custom HTTP adapter?

  #441 commented on Aug 22, 2025 • 0 new comments

• Feature request: accept param spec as `ZodType` instead of `ZodRawShape`

  #588 commented on Aug 21, 2025 • 0 new comments

• SDK V2

  #809 commented on Aug 21, 2025 • 0 new comments

• Client SDK support for `notifications/tools/list_changed`?

  #205 commented on Aug 20, 2025 • 0 new comments

• "Type instantiation is excessively deep and possibly infinite" typescript error when importing ToolCallback type

  #494 commented on Aug 18, 2025 • 0 new comments

• StdioTransport: Tool handler not invoked, client times out (Node.js subprocess on Linux)

  #576 commented on Aug 16, 2025 • 0 new comments

• MCP Server Env Vars Not Passed

  #259 commented on Aug 16, 2025 • 0 new comments

• sendLoggingMessage with Streamable HTTP - logs are not received

  #766 commented on Aug 8, 2025 • 0 new comments

• Using the built in auth router, the issuer URL is not fully utilized for the authorization endpoint

  #167 commented on Aug 7, 2025 • 0 new comments

• MCP - "Streamable HTTP" transport - Idle Session Timeout

  #812 commented on Aug 7, 2025 • 0 new comments

• MCP Python SDK sessionId not maintained in browser with TypeScript SDK client

  #764 commented on Aug 7, 2025 • 0 new comments

• Support JSON schema in addition to zod

  #283 commented on Aug 6, 2025 • 0 new comments

• Error MCP error -32602: MCP error -32602: Tool {TOOLNAME} not found"?

  #288 commented on Aug 2, 2025 • 0 new comments

• Where to search actually WORKING example of using Remote MCP server aka "Connector" for Claude?

  #777 commented on Jul 31, 2025 • 0 new comments

• Expose zod for SDK consumers to avoid version compatibility issues

  #802 commented on Jul 29, 2025 • 0 new comments

• Module resolution issues with TypeScript ESM imports

  #218 commented on Jul 28, 2025 • 0 new comments

• MCP TypeScript SDK generates JSON Schema draft-07, breaking compatibility with modern MCP clients requiring draft-2020-12

  #745 commented on Jul 28, 2025 • 0 new comments