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Title: feat: propagate session_id from transport to tool context by cbcoutinho · Pull Request #1608 · modelcontextprotocol/python-sdk · GitHub

Open Graph Title: feat: propagate session_id from transport to tool context by cbcoutinho · Pull Request #1608 · modelcontextprotocol/python-sdk

X Title: feat: propagate session_id from transport to tool context by cbcoutinho · Pull Request #1608 · modelcontextprotocol/python-sdk

Description: The official Python SDK for Model Context Protocol servers and clients - feat: propagate session_id from transport to tool context by cbcoutinho · Pull Request #1608 · modelcontextprotocol/python-sdk

Open Graph Description: Summary This PR enables tools to access the transport-level session ID via Context.session_id, supporting session-level tracing and observability use cases. Changes InitializationOptions: Add opti...

X Description: Summary This PR enables tools to access the transport-level session ID via Context.session_id, supporting session-level tracing and observability use cases. Changes InitializationOptions: Add opti...

Opengraph URL: https://github.com/modelcontextprotocol/python-sdk/pull/1608

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How to get session_id in tool #485https://github.com/modelcontextprotocol/python-sdk/issues/485
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November 10, 2025 21:29https://github.com/modelcontextprotocol/python-sdk/pull/1608#commits-pushed-3ca0718
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fix: add type annotations to Context and use JSON response mode in testshttps://github.com/modelcontextprotocol/python-sdk/pull/1608/commits/4af5453722fb07e622454109b2b5aaa86eb09e46
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Dec 1, 2025 https://github.com/modelcontextprotocol/python-sdk/pull/1608#ref-pullrequest-3681118859
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Feb 19, 2026 https://github.com/modelcontextprotocol/python-sdk/pull/1608#ref-issue-3962964311
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