1 Release published by 1 person

• v1.13.0

  published Aug 14, 2025

4 Pull requests merged by 4 people

• fix: prevent async generator cleanup errors in StreamableHTTP transport

  #1271 merged Aug 14, 2025

• Update dependencies and fix type issues

  #1268 merged Aug 14, 2025

• Consistent casing for default headers Accept and Content-Type

  #1263 merged Aug 12, 2025

• Add pyright strict mode on the whole project

  #1254 merged Aug 11, 2025

4 Pull requests opened by 3 people

• Add PATHEXT to default STDIO env vars in windows

  #1256 opened Aug 9, 2025

• Fix workspace configuration error with structured_output_lowlevel.py

  #1259 opened Aug 10, 2025

• Add ValidationOptions for lenient output schema validation

  #1260 opened Aug 10, 2025

• Fastmcp logging progress example

  #1270 opened Aug 13, 2025

23 Issues closed by 2 people

• Support unix domain sockets for local transport

  #1266 closed Aug 13, 2025

• Unicode support for non-latin language

  #107 closed Aug 13, 2025

• mcp.client.stdio Hangs

  #862 closed Aug 12, 2025

• error:"_b.throwIfAborted is not a function"

  #532 closed Aug 12, 2025

• Will not work if multiple MCP inspector windows are open

  #668 closed Aug 12, 2025

• Close resource issue

  #665 closed Aug 12, 2025

• MCP如何调用外部工具

  #672 closed Aug 12, 2025

• Pytests give error on first run

  #847 closed Aug 12, 2025

• MCP Server Initialization Fails with "spawn uv ENOENT" Error

  #334 closed Aug 12, 2025

• when i run mcp dev server.py ,successfully launched the service,but python server.py did not respond at all.

  #317 closed Aug 12, 2025

• Python tool call longer than 3-5sec freezes and breaks the code

  #298 closed Aug 12, 2025

• mcp-server-fetch tool_call Command ['node', 'ExtractArticle.js', '-i','/tmp/readabilipyik431eyl']

  #329 closed Aug 12, 2025

• The readme lacks a description about npx.

  #303 closed Aug 12, 2025

• MCP Server Does Not Expose `/run` Endpoint with `sse` Transport (Returns `Not Found#`)

  #229 closed Aug 12, 2025

• Return a PDF as a Tool result

  #162 closed Aug 12, 2025

• Question: version in `create_initialization_options` is the pkg_ver for "mcp"

  #87 closed Aug 12, 2025

• {'content': [{'type': 'text', 'text': 'Error: Unknown tool: get_current_time'}], 'isError': False}

  #234 closed Aug 12, 2025

• The SDK doesn't properly format Enums

  #1241 closed Aug 9, 2025

• Query-Aware `list_tools` for Scalable Tool Selection

  #1176 closed Aug 9, 2025

• mismatch between uri parameters set() and function parameters {'ctx'}

  #1215 closed Aug 9, 2025

• Issue when parsing for `Context` injection

  #1208 closed Aug 9, 2025

• MCP Python SDK for AMQP transport

  #1228 closed Aug 9, 2025

• lifespan shuts as soon as it opens

  #223 closed Aug 9, 2025

13 Issues opened by 13 people

• Bad Request when using multiple workers

  #1275 opened Aug 15, 2025

• Streamable HTTP client performance regression starting with v1.12.0

  #1274 opened Aug 14, 2025

• FASTMCP_ env var prefixes no longer respected since 1.12.3

  #1273 opened Aug 14, 2025

• Server hangs when shutting down if a connection is still open

  #1272 opened Aug 14, 2025

• FastMCP server death on client HEAD calls

  #1269 opened Aug 13, 2025

• Pydantic v2 compatibility issue: dumps_kwargs keyword arguments are no longer supported

  #1267 opened Aug 12, 2025

• Trailing slash in `.well-known/oauth-protected-resource` response may violate “Canonical Server URI” requirement

  #1265 opened Aug 12, 2025

• Protected Resource Metadata resource erroneous when setting up authentication on server

  #1264 opened Aug 12, 2025

• outputSchema is None

  #1262 opened Aug 12, 2025

• Add Example for MCP Pagination

  #1258 opened Aug 10, 2025

• Don’t use shell=True in mcp dev subprocess on Windows (command injection risk)

  #1257 opened Aug 10, 2025

• Python SDK v2

  #1253 opened Aug 9, 2025

• What is the recommended way of writing unit tests for MCP endpoints?

  #1252 opened Aug 8, 2025

28 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.

• Added Audio to FastMCP

  #1130 commented on Aug 9, 2025 • 5 new comments

• fix: resolve URL path truncation in SSE transport for proxied servers

  #1211 commented on Aug 12, 2025 • 2 new comments

• Implement RFC 7523 JWT flows

  #1247 commented on Aug 12, 2025 • 0 new comments

• feat: implement OPTIONS request support for Preflight checks in StreamableHTTP

  #1245 commented on Aug 9, 2025 • 0 new comments

• Add test for ProtectedResourceMetadataParsing

  #1236 commented on Aug 9, 2025 • 0 new comments

• Expose RequestParams._meta in ClientSession.call_tool

  #1231 commented on Aug 12, 2025 • 0 new comments

• fix: Handle SSE Disconnects Properly When use starlette middleware

  #1222 commented on Aug 11, 2025 • 0 new comments

• Fix: avoid uncessary retries in OAuth authenticated requests

  #1206 commented on Aug 10, 2025 • 0 new comments

• docs: clarify streamable_http_path configuration when mounting servers

  #1172 commented on Aug 14, 2025 • 0 new comments

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

  #431 commented on Aug 15, 2025 • 0 new comments

• MCP servers can not be accessed via Docker and docker-compose anymore.

  #790 commented on Aug 14, 2025 • 0 new comments

• MCP cannot process fastapi JSONResponse

  #1160 commented on Aug 14, 2025 • 0 new comments

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

  #915 commented on Aug 13, 2025 • 0 new comments

• Adding Opentelemetry to MCP SDK

  #421 commented on Aug 12, 2025 • 0 new comments

• Synchronous Python Client

  #309 commented on Aug 12, 2025 • 0 new comments

• mcp.types.Tool is not following python's naming convention

  #97 commented on Aug 12, 2025 • 0 new comments

• PydanticSchemaGenerationError: Unable to generate pydantic-core schema for Image type

  #1060 commented on Aug 10, 2025 • 0 new comments

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

  #1053 commented on Aug 9, 2025 • 0 new comments

• how to pass the token to the MCP Server side

  #1094 commented on Aug 9, 2025 • 0 new comments

• How to create an inner decorator for tools?

  #1120 commented on Aug 9, 2025 • 0 new comments

• Native sampling method on Context

  #1128 commented on Aug 9, 2025 • 0 new comments

• AssertionError: Unexpected message while using middlewares

  #883 commented on Aug 9, 2025 • 0 new comments

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

  #1129 commented on Aug 9, 2025 • 0 new comments

• Errors with Streamble HTTP

  #1072 commented on Aug 9, 2025 • 0 new comments

• Expected ',' or ']' after array element in JSON in every MCP-Response

  #290 commented on Aug 9, 2025 • 0 new comments

• How to actually build session persistence in streamable http MCP server?

  #880 commented on Aug 9, 2025 • 0 new comments

• FastMCP server with SSE transport fails to shut down on a signal

  #514 commented on Aug 8, 2025 • 0 new comments

• Add SSL Certificate Verification Options to FastMCP Client

  #870 commented on Aug 8, 2025 • 0 new comments