1 Release published by 1 person

• v1.9.0

  published May 15, 2025

13 Pull requests merged by 7 people

• Change default binding from 0.0.0.0 to 127.0.0.1 to align with security recommendations

  #738 merged May 20, 2025

• add auth client sse

  #760 merged May 20, 2025

• fastmcp: allow passing Tool directly to FastMCP constructor

  #699 merged May 20, 2025

• Add OAuth authentication client for HTTPX

  #751 merged May 19, 2025

• Servers to accept older versions of client

  #722 merged May 15, 2025

• Add progress notification callback for client

  #721 merged May 15, 2025

• fix: Update @mcp.resource to use function documentation as default descrip…

  #489 merged May 15, 2025

• Fix example for multiple stateless servers

  #720 merged May 15, 2025

• Set 2025-03-26 as the latest protocol version

  #719 merged May 15, 2025

• Include server examples folder in pyright check

  #667 merged May 15, 2025

• Add example for stateless server with JSON response

  #704 merged May 15, 2025

• feat: add cursor pagination support to all client list methods

  #718 merged May 15, 2025

• Update CI configuration to support multiple OS environments

  #708 merged May 14, 2025

15 Pull requests opened by 13 people

• fix: set default values for type in message content models

  #712 opened May 14, 2025

• Win32 fixes

  #723 opened May 15, 2025

• Add Dependabot configuration for GitHub Actions updates

  #724 opened May 15, 2025

• feat: support audio content

  #725 opened May 15, 2025

• feat: support embedded resources in sampling

  #727 opened May 15, 2025

• Feature/add enable disable methods tools

  #728 opened May 15, 2025

• Subprocess kill win32

  #729 opened May 16, 2025

• Allow kwargs down in AsyncClient when instantiating sse or streamable…

  #734 opened May 16, 2025

• add support for parallel run

  #739 opened May 16, 2025

• Configuring HTTP client for streamablehttp

  #742 opened May 17, 2025

• fix: Pass cursor parameter to server

  #745 opened May 18, 2025

• Issue 687 fix

  #747 opened May 19, 2025

• Support custom httpx client creation

  #752 opened May 19, 2025

• feat: Add output schema generation for tools and update documentation

  #757 opened May 19, 2025

• fix: add status field in Resource class and Resource as a return type in CallToolResult

  #758 opened May 19, 2025

8 Issues closed by 6 people

• RuntimeError: Task group is not initialized. Make sure to use run().

  #753 closed May 19, 2025

• when server run with sse, the mount_path never work

  #748 closed May 19, 2025

• SSE does not work on nested routes

  #733 closed May 16, 2025

• python fastMCP sse_client how to use subscribe_resource and handle NotificationHandler

  #527 closed May 16, 2025

• As of 1.8.0, does the SDK fully support the `2025-03-26` MCP spec?

  #677 closed May 15, 2025

• Incorrect latest protocol version

  #706 closed May 15, 2025

• how to manage multi streamable http server lifespan

  #713 closed May 15, 2025

• StreamableHttp Server send notify invalid

  #701 closed May 14, 2025

22 Issues opened by 21 people

• Allow installing mcp servers from local packages

  #762 opened May 20, 2025

• Allow Direct inputSchema Registration for Tools (Critical for API Gateway Integration)

  #761 opened May 20, 2025

• No way to return `nextCursor` using list_resources decorator

  #759 opened May 20, 2025

• Stateless Mode memory leak

  #756 opened May 19, 2025

• MCP External Library Callback Support

  #755 opened May 19, 2025

• Functionality to fetch output schemas as well on list_tools()

  #754 opened May 19, 2025

• how to get http request headers in mcp tools logic when i use streamable http mode to run mcp server ?

  #750 opened May 19, 2025

• Support anything other than strings in GetPromptRequestParams

  #749 opened May 19, 2025

• For resources, is there TTL for client to cache data

  #746 opened May 18, 2025

• test_streamable_http.py::test_streamablehttp_client_resumption hangs intermittently

  #744 opened May 17, 2025

• RuntimeError but the actual root cause is not logged correctly

  #743 opened May 17, 2025

• Enable Server-Initiated Notifications to All Connected Clients

  #741 opened May 16, 2025

• Bug Report: FastMCP `RuntimeError: Received request before initialization was complete` Leading to Empty SSE Responses When Embedded in FastAPI

  #737 opened May 16, 2025

• Leverage Pytest-Xdist for Faster and Cleaner Test Runs

  #736 opened May 16, 2025

• Cursors are not sent to the server correctly

  #735 opened May 16, 2025

• 307 Temporary Redirect

  #732 opened May 16, 2025

• 401 unauthorized on simple-auth example

  #731 opened May 16, 2025

• will environment variable be retained when stdio client gets executed

  #730 opened May 16, 2025

• ValueError: I/O operation on closed pipe

  #716 opened May 14, 2025

• removing a tool or resource dynamically

  #711 opened May 14, 2025

• how to trigger a resources_changed or listChanged

  #710 opened May 14, 2025

• client_credentials grant type for mcp oauth

  #709 opened May 13, 2025

35 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.

• Update README's auth block

  #620 commented on May 15, 2025 • 2 new comments

• add Tool.outputSchema and CallToolResult.structuredContent

  #685 commented on May 19, 2025 • 1 new comment

• 'JSONRPCMessage' object has no attribute 'message' in mcp 1.8.0

  #691 commented on May 13, 2025 • 0 new comments

• Auth for MCP - Starlette middleware vs. OAuthAuthorizationServerProvider

  #702 commented on May 20, 2025 • 0 new comments

• Fastmcp tool parameter parsing type error

  #381 commented on May 20, 2025 • 0 new comments

• send errors to pending requests if server closes

  #333 commented on May 14, 2025 • 0 new comments

• feat(client/sse): allow to set the timeout of `POST /messages`

  #340 commented on May 13, 2025 • 0 new comments

• fix: override input with json.loads only when output value is valid

  #350 commented on May 13, 2025 • 0 new comments

• Chatbot example: clean up servers in correct order

  #353 commented on May 15, 2025 • 0 new comments

• Added support for raw request injection in RequestContext.

  #380 commented on May 16, 2025 • 0 new comments

• Custom MCP requests + hooks

  #535 commented on May 16, 2025 • 0 new comments

• Fix Windows subprocess NotImplementedError (STDIO clients)

  #596 commented on May 17, 2025 • 0 new comments

• examples of elicit handling

  #626 commented on May 16, 2025 • 0 new comments

• Sending cancellation notification to server based on client anyio.CancelScope status

  #628 commented on May 18, 2025 • 0 new comments

• OutputSchema support to MCP tools

  #654 commented on May 13, 2025 • 0 new comments

• Add deepwiki link

  #694 commented on May 16, 2025 • 0 new comments

• Fix clean up sse disconnect event (not upgrade lib)

  #703 commented on May 14, 2025 • 0 new comments

• #552

  #707 commented on May 16, 2025 • 0 new comments

• Error during cleanup of server sqlite: Attempted to exit cancel scope in a different task than it was entered in

  #252 commented on May 14, 2025 • 0 new comments

• stdio_client init with errlog

  #645 commented on May 14, 2025 • 0 new comments

• Passing client context to tools

  #375 commented on May 14, 2025 • 0 new comments

• Low-level Server support for mcp dev and mcp run command

  #299 commented on May 14, 2025 • 0 new comments

• Synchronous Python Client

  #309 commented on May 15, 2025 • 0 new comments

• [Feature Proposal] Dynamic Server Management with McpClientManager + FastAPI

  #581 commented on May 15, 2025 • 0 new comments

• SSE 路径带上key，messages/接口如何获取到这个key，进行message消息里的auth认证

  #497 commented on May 15, 2025 • 0 new comments

• `@app.resource()` does not accept `ctx: Context`

  #244 commented on May 15, 2025 • 0 new comments

• How to get session_id in tool

  #485 commented on May 16, 2025 • 0 new comments

• Addition of client request headers to MCP tools

  #674 commented on May 16, 2025 • 0 new comments

• Conditionally Add Tools to an MCP

  #556 commented on May 17, 2025 • 0 new comments

• MCP Tool execution hangs indefinitely in stdio mode when calling external Python scripts

  #671 commented on May 17, 2025 • 0 new comments

• subscribe_resource return NotImplementedError

  #491 commented on May 17, 2025 • 0 new comments

• How to mount streamable HTTP app to an existing starlette app

  #673 commented on May 19, 2025 • 0 new comments

• Failed to run server: module 'mcp' has no attribute 'run'

  #560 commented on May 19, 2025 • 0 new comments

• MCP SSE Server: Received request before initialization was complete

  #423 commented on May 20, 2025 • 0 new comments

• Running Simple Auth Github Example throws 404 error

  #679 commented on May 20, 2025 • 0 new comments