2 Releases published by 1 person

• v1.8.0

  published May 8, 2025

• v1.8.1

  published May 12, 2025

19 Pull requests merged by 15 people

• 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

• Introduce a function to create a standard AsyncClient with options

  #655 merged May 8, 2025

• StreamableHttp - update docs

  #664 merged May 8, 2025

• Streamable HTTP - improve usability, fast mcp and auth

  #641 merged May 8, 2025

• Fix: Use absolute path to uv executable in Claude Desktop config

  #440 merged May 8, 2025

15 Pull requests opened by 14 people

• fix(win32): ensure proper termination of child processes

  #658 opened May 8, 2025

• Include server examples folder in pyright check

  #667 opened May 8, 2025

• feat: add partial results as part of progress notifications

  #669 opened May 8, 2025

• 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 .add_tool

  #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

• Add example for stateless server with JSON response

  #704 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

8 Issues closed by 4 people

• 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

• Implement Streamable HTTP transport

  #443 closed May 9, 2025

• Add support for tool annotations

  #445 closed May 9, 2025

• streamable_http.py not in Python SDK 1.7.1

  #650 closed May 9, 2025

27 Issues opened by 26 people

• ValueError: I/O operation on closed pipe

  #716 opened May 14, 2025

• how to manage multi streamable http server lifespan

  #713 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

• Incorrect latest protocol version

  #706 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

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

  #677 opened May 9, 2025

• Addition of client request headers to MCP tools

  #674 opened May 9, 2025

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

  #673 opened May 9, 2025

• MCP如何调用外部工具

  #672 opened May 9, 2025

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

  #671 opened May 9, 2025

• Check JSON-RPC-2.0 in request/response in MCP

  #670 opened May 9, 2025

• Will not work if multiple MCP inspector windows are open

  #668 opened May 8, 2025

• Close resource issue

  #665 opened May 8, 2025

• When I connect to Python Server using Java Client, I get a 'Received request before initialization was complete' exception.

  #663 opened May 8, 2025

• Error when calling MCP tool with arguments and tool name in live environment

  #662 opened May 8, 2025

• Call to `hatchling.build.prepare_metadata_for_build_editable` failed

  #660 opened May 8, 2025

40 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 13, 2025 • 2 new comments

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

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

• 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

• Added support for raw request injection in RequestContext.

  #380 commented on May 13, 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

• 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

• confused deputy fix in example + supporting sdk changes

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

• OutputSchema support to MCP tools

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

• MCP Server with Python on Claude Desktop Never Exits

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

• Error: Timed out while waiting for response to ClientRequest. Waited 0:00:05 seconds

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

• We need some more client and sampling examples and use-cases.

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

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

  #426 commented on May 9, 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

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

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

• Synchronous Python Client

  #309 commented on May 14, 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

• python fastMCP sse_client how to use subscribe_resource and handle NotificationHandler

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

• enable http headers in sse in the context

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