2 Releases published by 1 person

• v1.8.1

  published May 12, 2025

• v1.9.0

  published May 15, 2025

23 Pull requests merged by 17 people

• 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

• feat: add message to ProgressNotification

  #435 merged May 13, 2025

• Fix hanging on streams when stdio_client exiting

  #559 merged May 13, 2025

• fix: Add checks and better error messages on server object for mcp run

  #297 merged May 13, 2025

• [Fix]: Pytest for test_desktop

  #452 merged May 13, 2025

• docs: clarify LLM API configuration in mcp_simple_chatbot README

  #487 merged May 13, 2025

• fix typo: server has get_context attribute instead of request_context.

  #446 merged May 13, 2025

• Create ClientSessionGroup for managing multiple session connections.

  #639 merged May 13, 2025

• Simple Auth Example to use shttp in addition to sse

  #695 merged May 12, 2025

• Properly infer prefix for SSE messages

  #659 merged May 12, 2025

• Minor tweaks to README for Streamable HTTP

  #690 merged May 12, 2025

• fix: 204 is an acceptable response to DELETEing the session

  #697 merged May 12, 2025

• Test fixes for v1.7.x

  #684 merged May 12, 2025

• Fix typo in authentication section of README

  #676 merged May 12, 2025

• Fix streamable http sampling

  #693 merged May 12, 2025

21 Pull requests opened by 17 people

• OAuth Client Provider for Streamable HTTP Client

  #681 opened May 11, 2025

• Add wildcard '*' to the Accept header in response to API requests.

  #683 opened May 11, 2025

• WIP: add tool outputSchema and DataContent type to support structured content

  #685 opened May 11, 2025

• Move `Prompt` object instantiation from server to prompt manager

  #687 opened May 12, 2025

• Add deepwiki link

  #694 opened May 12, 2025

• fastmcp: allow passing Tool directly to FastMCP constructor

  #699 opened May 12, 2025

• Dynamic Authorization in Streamable HTTP Client

  #700 opened May 12, 2025

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

  #703 opened May 13, 2025

• #552

  #707 opened May 13, 2025

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

  #712 opened May 14, 2025

• Async resource support

  #717 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

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

  #738 opened May 16, 2025

• add support for parallel run

  #739 opened May 16, 2025

• Issue 687 fix

  #740 opened May 16, 2025

9 Issues closed by 5 people

• 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

• Deleting the session logs a warning if the server responds with HTTP 204

  #696 closed May 12, 2025

• Streamable HTTP hangs forever when the server attempts any callback

  #680 closed May 12, 2025

• Issue with the latest version of Click

  #689 closed May 12, 2025

• Upgrade MCP’s FastMCP Dependency to Support Tags

  #661 closed May 11, 2025

21 Issues opened by 20 people

• 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

• SSE does not work on nested routes

  #733 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

• SSE client doesn't raise exception if the MCP server responds with text/html

  #705 opened May 13, 2025

• Auth for MCP - Starlette middleware vs. OAuthAuthorizationServerProvider

  #702 opened May 13, 2025

• Tool.run should not reveal exception value to the client

  #698 opened May 12, 2025

• Reuse Streamable HTTP session_id from multiple Web Server Instances

  #692 opened May 12, 2025

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

  #691 opened May 12, 2025

• After "uv run mcp" getting TypeError: Parameter.make_metavar() missing 1 required positional argument: 'ctx'

  #688 opened May 12, 2025

• Implement support for the new authorization specification

  #686 opened May 12, 2025

• ALIEN HOUSE MUSIC 2

  #682 opened May 11, 2025

• Running Simple Auth Github Example throws 404 error

  #679 opened May 9, 2025

• Stateless Streamable HTTP Client

  #678 opened May 9, 2025

47 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.

• feat: add partial results as part of progress notifications

  #669 commented on May 13, 2025 • 2 new comments

• Update README's auth block

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

• examples of elicit handling

  #626 commented on May 16, 2025 • 1 new comment

• Fix handle sse disconnect event to free read_stream_writers[session_id]

  #582 commented on May 13, 2025 • 1 new comment

• The get_greeting resource from the quickstart guide is not available to Claude Desktop

  #426 commented on May 9, 2025 • 0 new comments

• fix: Watch startup errors for stdio client

  #289 commented on May 13, 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

• fix: enables context injection into resources

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

• Added RFC 6570 complaint form style query expansion as optional param…

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

• Fix issue #428: ClientSession.initialize gets stuck if the MCP server process exits

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

• Add optional headers argument to websocket transport

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

• fix: implemented exception handling for client indefinite blocks

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

• Custom MCP requests + hooks

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

• test: add pytest coverage for SSE transport functions

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

• Fix async callable object tools

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

• Preserve non-ASCII characters in JSON output for better multilingual support

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

• Fix Windows subprocess NotImplementedError (STDIO clients)

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

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

  #628 commented on May 10, 2025 • 0 new comments

• Simplified client progress_callback support

  #632 commented on May 9, 2025 • 0 new comments

• OutputSchema support to MCP tools

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

• No way to get `request_id` for a tool call to cancel it

  #230 commented on May 10, 2025 • 0 new comments

• dynamic resource not working in Claude desktop

  #263 commented on May 10, 2025 • 0 new comments

• cannot get response from await session.call_tool()

  #262 commented on May 12, 2025 • 0 new comments

• Proactor Windows warning on cleanup when using stdio_client

  #391 commented on May 12, 2025 • 0 new comments

• Is call_tool response streaming

  #470 commented on May 12, 2025 • 0 new comments

• Remote MCP Oauth Example

  #618 commented on May 12, 2025 • 0 new comments

• `RuntimeError: Attempted to exit cancel scope in a different task` when cleaning up multiple MCPClient instances out-of-order

  #577 commented on May 12, 2025 • 0 new comments

• Bug: RuntimeError during cleanup on Windows – no running event loop

  #575 commented on May 12, 2025 • 0 new comments

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

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

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

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

• Support custom OAuthClientProviders (similar to TypeScript SDK) to enable custom authentication logic in client code

  #652 commented on May 13, 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

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

  #560 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

• enable http headers in sse in the context

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