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Title: First end-to-end 2026-07-28 stateless tools/call (experimental entry + ClientSession pin) by maxisbey · Pull Request #2910 · modelcontextprotocol/python-sdk · GitHub

Open Graph Title: First end-to-end 2026-07-28 stateless tools/call (experimental entry + ClientSession pin) by maxisbey · Pull Request #2910 · modelcontextprotocol/python-sdk

X Title: First end-to-end 2026-07-28 stateless tools/call (experimental entry + ClientSession pin) by maxisbey · Pull Request #2910 · modelcontextprotocol/python-sdk

Description: The official Python SDK for Model Context Protocol servers and clients - First end-to-end 2026-07-28 stateless tools/call (experimental entry + ClientSession pin) by maxisbey · Pull Request #2910 · modelcontextprotocol/python-sdk

Open Graph Description: First end-to-end slice of the 2026-07-28 stateless protocol, plus the interaction-suite era axis turned on so the existing transport-agnostic tests run at the new revision. Part of #2891, #2892, #2...

X Description: First end-to-end slice of the 2026-07-28 stateless protocol, plus the interaction-suite era axis turned on so the existing transport-agnostic tests run at the new revision. Part of #2891, #2892, #2...

Opengraph URL: https://github.com/modelcontextprotocol/python-sdk/pull/2910

X: @github

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Tighten the consolidated 2026-07-28 interaction testshttps://github.com/modelcontextprotocol/python-sdk/pull/2910/commits/3afe0f0c0c9c4940141cbf9ccd097aff335b8cc3
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Dispatch ClientSession.protocol_version by era instead of restricting…https://github.com/modelcontextprotocol/python-sdk/pull/2910/commits/12f2539601fbeab37ae8f9f2a72abffa18ba22d1
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Make a pinned ClientSession born-initialized and centralize the moder…https://github.com/modelcontextprotocol/python-sdk/pull/2910/commits/4954ed41286d3ec08c5696fe912b1ff1fd6e07a5
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Use MODERN_PROTOCOL_VERSIONS membership instead of a threshold constanthttps://github.com/modelcontextprotocol/python-sdk/pull/2910/commits/47a422c3920f7b68fe6b1ccdf17a786cb259aa7c
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Report the negotiated protocol_version once initialized; clarify enve…https://github.com/modelcontextprotocol/python-sdk/pull/2910/commits/1044f42ee2649c5db47a0f2d9e1ea1e8b6493279
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Ignore pre-2026 protocol_version pins at the StreamableHTTP transport #2923 https://github.com/modelcontextprotocol/python-sdk/pull/2923
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