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Title: Add MCP proxy helper by Kludex · Pull Request #2388 · modelcontextprotocol/python-sdk · GitHub

Open Graph Title: Add MCP proxy helper by Kludex · Pull Request #2388 · modelcontextprotocol/python-sdk

X Title: Add MCP proxy helper by Kludex · Pull Request #2388 · modelcontextprotocol/python-sdk

Description: Summary add a top-level mcp_proxy() helper in mcp/proxy.py and export it from mcp implement the proxy with the repo's generic read/write stream protocols and the reviewed on_error API replace the original timing- and coverage-driven test approach with deterministic tests for forwarding, error handling, and stream closure behavior Why PR #1763 was closed after accumulating review feedback. This reimplements the proxy from current main while applying the requested changes: move the module to mcp/proxy.py avoid new pragma: no cover additions remove timing-based sleeps from tests remove type: ignore assertions in tests simplify logging and broad exception handling Testing uv run pytest tests/test_proxy.py -q UV_CACHE_DIR=/tmp/uv-cache uv run ruff check src/mcp/proxy.py tests/test_proxy.py UV_CACHE_DIR=/tmp/uv-cache uv run pyright src/mcp/proxy.py tests/test_proxy.py

Open Graph Description: Summary add a top-level mcp_proxy() helper in mcp/proxy.py and export it from mcp implement the proxy with the repo's generic read/write stream protocols and the reviewed on_error API replace ...

X Description: Summary add a top-level mcp_proxy() helper in mcp/proxy.py and export it from mcp implement the proxy with the repo's generic read/write stream protocols and the reviewed on_error API repl...

Opengraph URL: https://github.com/modelcontextprotocol/python-sdk/pull/2388

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3c31190 Add reviewed MCP proxy helper Kludex Apr 3, 2026 https://github.com/modelcontextprotocol/python-sdk/pull/2388/commits/3c31190dbc4493f8c1bfec6e38320cde9a900cbe
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