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Title: Return 405 for GET in stateless mode by MukundaKatta · Pull Request #2475 · modelcontextprotocol/python-sdk · GitHub

Open Graph Title: Return 405 for GET in stateless mode by MukundaKatta · Pull Request #2475 · modelcontextprotocol/python-sdk

X Title: Return 405 for GET in stateless mode by MukundaKatta · Pull Request #2475 · modelcontextprotocol/python-sdk

Description: Summary return 405 with Allow: POST for standalone GET requests when the server is running in stateless mode keep the existing stateful GET SSE behavior unchanged add an end-to-end regression test for stateless GET requests Testing python3 -m py_compile src/mcp/server/streamable_http.py tests/shared/test_streamable_http.py pytest tests/shared/test_streamable_http.py -k "stateless or method_not_allowed or get_validation" (not run locally: pytest is not installed in this environment)

Open Graph Description: Summary return 405 with Allow: POST for standalone GET requests when the server is running in stateless mode keep the existing stateful GET SSE behavior unchanged add an end-to-end regression test...

X Description: Summary return 405 with Allow: POST for standalone GET requests when the server is running in stateless mode keep the existing stateful GET SSE behavior unchanged add an end-to-end regression test...

Opengraph URL: https://github.com/modelcontextprotocol/python-sdk/pull/2475

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70035d5 Return 405 for GET in stateless mode MukundaKatta Apr 19, 2026 https://github.com/modelcontextprotocol/python-sdk/pull/2475/commits/70035d5c73de921a0157a343ab00a9da81daa987
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