2 Releases published by 2 people

• v1.10.0

  published Jun 26, 2025

• v1.10.1

  published Jun 27, 2025

15 Pull requests merged by 8 people

• Update MCP to use Pydantic>=2.11

  #1041 merged Jun 27, 2025

• Remove setting global logging config

  #1048 merged Jun 27, 2025

• Remove frozen from build

  #1040 merged Jun 26, 2025

• unpin jsonschema version

  #1037 merged Jun 26, 2025

• Update latest protocol version to 2025-06-18

  #1036 merged Jun 26, 2025

• feat: Add structured output support for tool functions

  #993 merged Jun 26, 2025

• Add schema validation to lowlevel server

  #1005 merged Jun 25, 2025

• ci: add --frozen flag to all uv commands in workflows

  #970 merged Jun 25, 2025

• Make "resource" optional on earlier protocols

  #1017 merged Jun 25, 2025

• refactor: rename DummyProcess to FallbackProcess in Windows stdio

  #1015 merged Jun 24, 2025

• Fix /.well-known/oauth-authorization-server dropping path

  #1014 merged Jun 24, 2025

• Remove github from auth examples

  #1011 merged Jun 24, 2025

• Fix Windows subprocess NotImplementedError (STDIO clients)

  #596 merged Jun 24, 2025

• RFC 8707 Resource Indicators Implementation

  #991 merged Jun 23, 2025

• MCP server separation into Authorization Server (AS) and Resource Server (RS) roles per spec PR #338

  #982 merged Jun 23, 2025

13 Pull requests opened by 13 people

• The lifespan_context object here is not a dictionary like the other e…

  #1002 opened Jun 22, 2025

• feat(client): add _meta support to call_tool for tool calls\n\n- Adds…

  #1003 opened Jun 22, 2025

• feat: default streamable_http_path to "/" for consistency

  #1007 opened Jun 23, 2025

• fix: Add exception handling for POST request failures in StreamableHTTP

  #1008 opened Jun 23, 2025

• feat: Make maximum message size configurable

  #1019 opened Jun 24, 2025

• Implement support for `client_credentials`

  #1020 opened Jun 24, 2025

• add resource templates in example to make example complete

  #1021 opened Jun 25, 2025

• add authorizer plugin to enable fine grained authorization checks on …

  #1032 opened Jun 25, 2025

• Bug fix: a missing type variable ReceiveResultT in the BaseSession class definition.

  #1034 opened Jun 26, 2025

• Adding roots changed and initialized notification handlers

  #1043 opened Jun 26, 2025

• Add regression tests for #559 and #555

  #1044 opened Jun 26, 2025

• fix: support "form_post" to be one of response modes in authorization server metadata validation

  #1046 opened Jun 27, 2025

• Flaky test fix

  #1050 opened Jun 28, 2025

11 Issues closed by 7 people

• Bug Report: StreamableHTTP GET Requests Fail with "Bad Request: Missing session ID" During Initial Connection

  #1051 closed Jun 28, 2025

• Request redirection for the MCP server mounted with FastAPI

  #951 closed Jun 28, 2025

• Unintended global logging configuration introduced in v1.10.0

  #1045 closed Jun 27, 2025

• SseServerTransport should better handle the quoting the post message endpoint.

  #827 closed Jun 27, 2025

• New JSON Schema Requirement Bumps with LiteLLM

  #1029 closed Jun 26, 2025

• update latest version in SDK

  #923 closed Jun 26, 2025

• add Tool.outputSchema and CallToolResult.structuredContent

  #919 closed Jun 26, 2025

• Potential issue / spec noncompliance with request id types

  #1025 closed Jun 25, 2025

• Bug in the simple-auth server example

  #949 closed Jun 24, 2025

• Add requirement for RFC8707

  #962 closed Jun 23, 2025

• auth spec implementation

  #921 closed Jun 23, 2025

20 Issues opened by 19 people

• WWW-Authentication header is not respected by Client SDK

  #1054 opened Jun 28, 2025

• Streamable HTTP transport fails when accessing MCP server on Cloud Run using sdk

  #1053 opened Jun 28, 2025

• The resource URL path is ignored when building the protected resource metadata URL

  #1052 opened Jun 28, 2025

• oauth protected resource metadata URL

  #1049 opened Jun 28, 2025

• MCP server: AccessToken class should have field for subject claim ("sub")

  #1038 opened Jun 26, 2025

• mcp.shared.auth_utils package not available on main branch

  #1035 opened Jun 26, 2025

• Different models for the same entity for FastMCP vs low-level.Server.

  #1033 opened Jun 26, 2025

• Enable FastMCP to filter tools, prompts, resources using a fine grained policy

  #1031 opened Jun 25, 2025

• Empty tools list when calling tools/list method

  #1030 opened Jun 25, 2025

• The cleanup procedure after "yield" in lifespan is unreachable on Windows

  #1027 opened Jun 25, 2025

• Why does @mcp.resource() not handle Image return types the same as @mcp.tool()?

  #1026 opened Jun 25, 2025

• VSCode Support

  #1024 opened Jun 25, 2025

• Support for Parameter Passing in MCP Configuration and Runtime Context

  #1023 opened Jun 25, 2025

• how to handle mcp server down or reconnect?

  #1022 opened Jun 25, 2025

• Update _client_info on the ClientSession upon initialization with serverInfo

  #1018 opened Jun 24, 2025

• Claude Desktop never uses resources from my MCP server

  #1016 opened Jun 24, 2025

• add a 'params' arguments for tools/list request

  #1013 opened Jun 24, 2025

• [feature] Make `MAXIMUM_MESSAGE_SIZE` configurable instead of hard coding to 4MB

  #1012 opened Jun 24, 2025

• BUG REPORT: HTTP errors are being silently swallowed in the StreamableHTTP client

  #1010 opened Jun 23, 2025

• Session ID not present in memory store should return 404, not 400

  #1004 opened Jun 23, 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.

• Fix: Prevent session manager shutdown on individual session crash

  #841 commented on Jun 23, 2025 • 7 new comments

• Improved Trio support

  #946 commented on Jun 26, 2025 • 5 new comments

• Added CORS middleware to allow cross-origin requests

  #371 commented on Jun 28, 2025 • 1 new comment

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

  #737 commented on Jun 27, 2025 • 0 new comments

• Response ID-value not matching request value, due to default int

  #961 commented on Jun 27, 2025 • 0 new comments

• Question: How to log information in MCP server

  #467 commented on Jun 27, 2025 • 0 new comments

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

  #427 commented on Jun 23, 2025 • 0 new comments

• Fix stdio_client kill process after timeout

  #555 commented on Jun 26, 2025 • 0 new comments

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

  #628 commented on Jun 28, 2025 • 0 new comments

• Fix 307 Temporary Redirect when use streamable_http

  #781 commented on Jun 25, 2025 • 0 new comments

• Feature: Async handling of sampling calls

  #840 commented on Jun 24, 2025 • 0 new comments

• Fix child process kill error with npx based servers

  #850 commented on Jun 23, 2025 • 0 new comments

• OAuth Update: Adding the Client Credentials & Token Exchange Grant Types

  #882 commented on Jun 27, 2025 • 0 new comments

• Doc update + validation in SseServerTransport + existing test fixes: addresses Issue: #827

  #900 commented on Jun 28, 2025 • 0 new comments

• tests: use `inline_snapshot.Is` on parametrized test

  #945 commented on Jun 23, 2025 • 0 new comments

• docs: add pre-commit install guide on CONTRIBUTING.md

  #995 commented on Jun 28, 2025 • 0 new comments

• chore: add markdownlint on pre-commit hook and lint md files

  #996 commented on Jun 28, 2025 • 0 new comments

• Enhance FastMCP server with port override functionality

  #997 commented on Jun 26, 2025 • 0 new comments

• fix: use normalized path for sse message endpoint

  #1000 commented on Jun 24, 2025 • 0 new comments

• Fix FastMCP integration tests and transport security

  #1001 commented on Jun 24, 2025 • 0 new comments

• mount_path does not work with sse_app

  #783 commented on Jun 21, 2025 • 0 new comments

• Better CORS defaults for SSE transport

  #187 commented on Jun 22, 2025 • 0 new comments

• Exception in `ClientSessionGroup` if `streamable_http` MCP server is not available

  #915 commented on Jun 22, 2025 • 0 new comments

• MCP Python SDK is rejecting JSON-RPC batch requests

  #934 commented on Jun 22, 2025 • 0 new comments

• Inconsistency in `types.py` schema for `RequestParams`

  #913 commented on Jun 22, 2025 • 0 new comments

• Add "meta" to call_tool method

  #621 commented on Jun 22, 2025 • 0 new comments

• Drop uvicorn from test suite

  #857 commented on Jun 24, 2025 • 0 new comments

• Question: How to authorise a client with Bearer header with SSE?

  #431 commented on Jun 24, 2025 • 0 new comments

• dynamic resource not working in Claude desktop

  #263 commented on Jun 24, 2025 • 0 new comments

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

  #426 commented on Jun 24, 2025 • 0 new comments

• enhance auth server discovery with OAuth2 and OIDC metadata support

  #976 commented on Jun 24, 2025 • 0 new comments

• how to list the tools of streamable mcpserver?

  #940 commented on Jun 25, 2025 • 0 new comments

• Auth for MCP - Starlette middleware vs. OAuthAuthorizationServerProvider

  #702 commented on Jun 25, 2025 • 0 new comments

• Getting as async generator object instead of data being to be received as an output through streamable-Http

  #784 commented on Jun 25, 2025 • 0 new comments

• Can HTTP streamable support tool execution process return StreamingResponse , similar to large model dialogue?

  #930 commented on Jun 25, 2025 • 0 new comments

• can we call tools and return steaming output?

  #472 commented on Jun 25, 2025 • 0 new comments

• AssertionError: Unexpected message while using middlewares

  #883 commented on Jun 26, 2025 • 0 new comments

• How tools should be created to use images in Claude Desktop?

  #771 commented on Jun 26, 2025 • 0 new comments

• Important - List Resource is not working

  #268 commented on Jun 26, 2025 • 0 new comments

• feat: Provide an option to increase request payload size in server implementation

  #959 commented on Jun 26, 2025 • 0 new comments