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Race Condition in StreamableHTTP Transport Causes ClosedResourceError

4

### Initial Checks - [x] I confirm that I'm using the latest version of MCP Python SDK - [x] I confirm that I searched for my issue in https://github.com/modelcontextprotocol/python-sdk/issues before...

Edison-A-N

fall through if PRM endpoint is not implemented

2

## Motivation and Context As raised in https://github.com/modelcontextprotocol/python-sdk/issues/1495, one of the changes in https://github.com/modelcontextprotocol/python-sdk/pull/1324 included raising an error if PRM endpoint request failed. This caused backwards compatibility issues with MCP...

dogacancolak

Add `streamable_http_client` which accepts `httpx.AsyncClient` instead of `httpx_client_factory`

10

The current name is not very intuitive considering the class name and the module.

Kludex

## Summary Replaces environment variables with command-line arguments in the simple-auth-client example, providing a more flexible and intuitive interface for specifying server URLs and transport types. ## Motivation and Context...

maxisbey

MCP SDK Pydantic v2 Compatibility Bug Report

3

### Initial Checks - [x] I confirm that I'm using the latest version of MCP Python SDK - [x] I confirm that I searched for my issue in https://github.com/modelcontextprotocol/python-sdk/issues before...

rijovarghese9

Issue: Custom HTTP Headers (e.g., mcp-session-id) Not Received by FastMCP Server

3

### Initial Checks - [x] I confirm that I'm using the latest version of MCP Python SDK - [x] I confirm that I searched for my issue in https://github.com/modelcontextprotocol/python-sdk/issues before...

hileamlakB

Added comprehensive guidance documentation comparing FastMCP (high-level) and Low-Level Server implementations for StreamableHTTP MCP servers in Python, helping developers choose the right approach for their use case ## Motivation and...

kumarsagar-collab

Currently, the OAuth2 PKCE implementation in [src/mcp/client/auth.py](https://github.com/modelcontextprotocol/python-sdk/blob/d0443a18328a2fc9e87da6feee9130f95c0b37a7/src/mcp/client/auth.py#L312-L313) stores the `state` and `code_verifier` in memory only, which prevents splitting the OAuth authorization flow across multiple processes. This is common for apps...

andrey-star

Custom objects result in large input schema blocks

1

The refs structure of common json schema means the $defs of input objects get defined once per tool . Perhaps referenced object schemas could be provided separately from the input...

strawgate