1 Release published by 1 person

• v1.12.0

  published Jul 17, 2025

21 Pull requests merged by 11 people

• fix flaky test test_88_random_error

  #1171 merged Jul 18, 2025

• Add CODEOWNERS file for sdk

  #1169 merged Jul 18, 2025

• Support falling back to OIDC metadata for auth

  #1061 merged Jul 17, 2025

• README - replace code snippets with examples -- auth examples

  #1164 merged Jul 17, 2025

• fix flaky fix-test_streamablehttp_client_resumption test

  #1166 merged Jul 17, 2025

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

  #995 merged Jul 17, 2025

• Docs: Update CallToolResult parsing in README

  #812 merged Jul 17, 2025

• Tests(cli): Add coverage for helper functions

  #635 merged Jul 17, 2025

• chore: don't allow users to create issues outside the templates

  #1163 merged Jul 17, 2025

• README - replace code snippets with examples - streamable http

  #1155 merged Jul 16, 2025

• README - replace code snippets with examples - add lowlevel to snippets

  #1150 merged Jul 16, 2025

• fix markdown error in README in main

  #1147 merged Jul 15, 2025

• Add streamable HTTP starlette example to Python SDK docs

  #1111 merged Jul 15, 2025

• Implement RFC9728 - Support WWW-Authenticate header by MCP client

  #1071 merged Jul 15, 2025

• Add regression test for stateless request memory cleanup

  #1140 merged Jul 15, 2025

• tests: use inline_snapshot.Is on parametrized test

  #945 merged Jul 14, 2025

• Close server session after handle stateless request

  #1116 merged Jul 14, 2025

• README - replace code snippets with examples - direct execution and display utilities

  #1137 merged Jul 14, 2025

• tests: mark trailing slash test as xfail

  #1138 merged Jul 14, 2025

• README - replace code snippets with examples

  #1136 merged Jul 14, 2025

• Fix BaseModel method name conflicts in func_metadata

  #1123 merged Jul 14, 2025

12 Pull requests opened by 12 people

• Added Audio to FastMCP

  #1130 opened Jul 12, 2025

• Allow arbitrary types in model creation by updating config in create_model

  #1132 opened Jul 12, 2025

• Set LifespanResultT default=Any to prevent reportMissingTypeArgument

  #1139 opened Jul 14, 2025

• Fix MCP Client SSE URL Parsing Issue

  #1145 opened Jul 15, 2025

• fix: Return JSON-RPC protocol errors for unknown tools

  #1149 opened Jul 16, 2025

• Fix: Replace threading.Lock with anyio.Lock for Ray deployment compatibility

  #1151 opened Jul 16, 2025

• server: skip duplicate response on CancelledError

  #1153 opened Jul 16, 2025

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

  #1154 opened Jul 16, 2025

• Add idle timeout termination for StreamableHTTPServerTransport

  #1159 opened Jul 16, 2025

• feat: add claims field to AccessToken for decoded token payload

  #1165 opened Jul 17, 2025

• docs: clarify streamable_http_path configuration when mounting servers

  #1172 opened Jul 18, 2025

• DRAFT: fix for OAuth request bug

  #1174 opened Jul 19, 2025

3 Issues closed by 3 people

• enhance auth server discovery with OAuth2 and OIDC metadata support

  #976 closed Jul 17, 2025

• WWW-Authenticate header is not respected by Client SDK

  #1054 closed Jul 15, 2025

• uvicon server configured should be able to get extra settings from FastMcp constructor extra args.

  #1106 closed Jul 14, 2025

16 Issues opened by 16 people

• Response parsing errors after OAuth flow

  #1173 opened Jul 18, 2025

• How to see newly added mcp tools in claude desktop

  #1170 opened Jul 18, 2025

• FastMCP's +Starlette's Router => 307 Temporary Redirect for /mcp

  #1168 opened Jul 17, 2025

• Missing MCP Session id information in Server session

  #1167 opened Jul 17, 2025

• MCP cannot process JSON data.

  #1160 opened Jul 17, 2025

• How do i list all the tools in my mcp server in a custom route

  #1157 opened Jul 16, 2025

• Proposal to Rewrite or Replace ClientSessionGroup to Solve "Attempted to exit cancel scope" (#922)

  #1156 opened Jul 16, 2025

• CancelledError causes duplicate response and server crash

  #1152 opened Jul 16, 2025

• Enhancement in list_tools for both client and servce side

  #1148 opened Jul 16, 2025

• Streamable Http transport handle ping message

  #1146 opened Jul 15, 2025

• streamable_http client call_tool hangs when receiving invalid JSONRPCMessage

  #1144 opened Jul 15, 2025

• Progress notifications cause server to hang on stdio transport

  #1141 opened Jul 14, 2025

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

  #1135 opened Jul 14, 2025

• Use inspect.getdoc(fn) instead of fn.__doc__ in tool automatic description retrieval in FastMCP

  #1134 opened Jul 13, 2025

• Pydantic schema generation fails for non-standard output types in toolkit functions

  #1131 opened Jul 12, 2025

• Tool context kwarg detection not compatible with string-valued/__future__ annotations

  #1129 opened Jul 12, 2025

32 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.

• Handles message type Exception in lowlevel/server.py _handle_message function. Mentioned as TODO on line 528.

  #786 commented on Jul 15, 2025 • 1 new comment

• Fix/get prompt description

  #640 commented on Jul 14, 2025 • 1 new comment

• [fix] add type field to client session config BaseModels

  #1127 commented on Jul 16, 2025 • 0 new comments

• Implemented runtime tools

  #1089 commented on Jul 14, 2025 • 0 new comments

• FEAT: enables oauth proxy capability

  #1075 commented on Jul 12, 2025 • 0 new comments

• Implement support for `client_credentials`

  #1020 commented on Jul 17, 2025 • 0 new comments

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

  #1008 commented on Jul 17, 2025 • 0 new comments

• feat: default streamable_http_path to "/" for consistency

  #1007 commented on Jul 18, 2025 • 0 new comments

• fix: use normalized path for sse message endpoint

  #1000 commented on Jul 18, 2025 • 0 new comments

• Improved Trio support

  #946 commented on Jul 15, 2025 • 0 new comments

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

  #882 commented on Jul 18, 2025 • 0 new comments

• Improved docs for better clarity on mounting ASGI apps

  #873 commented on Jul 17, 2025 • 0 new comments

• Add root_path support to properly route subpaths for SSE and streamable-http endpoints when behind Nginx or other HTTP reverse proxies

  #797 commented on Jul 17, 2025 • 0 new comments

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

  #758 commented on Jul 14, 2025 • 0 new comments

• Custom MCP requests + hooks

  #535 commented on Jul 17, 2025 • 0 new comments

• Force returning tool result/ressource as artifact without regeneration

  #509 commented on Jul 18, 2025 • 0 new comments

• Stateless Mode memory leak

  #756 commented on Jul 18, 2025 • 0 new comments

• Unable to run a minimal MCP server and testing it with mcp inspector.

  #858 commented on Jul 17, 2025 • 0 new comments

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

  #1052 commented on Jul 17, 2025 • 0 new comments

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

  #961 commented on Jul 17, 2025 • 0 new comments

• MCP client not able to initiate StdioServerParameters while running in Jupyter Notebook

  #1103 commented on Jul 16, 2025 • 0 new comments

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

  #431 commented on Jul 16, 2025 • 0 new comments

• Remote MCP Oauth Example

  #618 commented on Jul 15, 2025 • 0 new comments

• Client Registration Fails with 502 Error When Connecting to Auth Server

  #852 commented on Jul 15, 2025 • 0 new comments

• An error exists in the elicitation example

  #1084 commented on Jul 15, 2025 • 0 new comments

• MCP connection fails silently

  #1100 commented on Jul 15, 2025 • 0 new comments

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

  #1053 commented on Jul 15, 2025 • 0 new comments

• call_tool Hangs During In-Memory Testing When Server Sends Notifications Before Response

  #594 commented on Jul 14, 2025 • 0 new comments

• Is there a way to protect tools, ie auth parameters for @mcp.tool()?

  #1125 commented on Jul 14, 2025 • 0 new comments

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

  #1038 commented on Jul 14, 2025 • 0 new comments

• MCP Server Internal Server Error Report

  #417 commented on Jul 14, 2025 • 0 new comments

• Errors with Streamble HTTP

  #1072 commented on Jul 12, 2025 • 0 new comments