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Title: fix(auth): get_access_token reflects current request in stateful sessions by Epochex · Pull Request #2675 · modelcontextprotocol/python-sdk · GitHub

Open Graph Title: fix(auth): get_access_token reflects current request in stateful sessions by Epochex · Pull Request #2675 · modelcontextprotocol/python-sdk

X Title: fix(auth): get_access_token reflects current request in stateful sessions by Epochex · Pull Request #2675 · modelcontextprotocol/python-sdk

Description: Fixes #2208. Stateful Streamable HTTP sessions start the server task group on the first request. Anyio copies the request contextvars into that long-lived task, so get_access_token() could keep returning the token from the session-creating request even when later requests send a different Authorization header. This change pushes the authenticated user into the auth contextvar at request-dispatch time (using the ServerMessageMetadata.request_context threaded through the transport), and resets it after the handler returns. Tests: uv run python -m pytest tests/server/auth/middleware/test_auth_context.py tests/server/auth/test_get_access_token_streamable_http.py

Open Graph Description: Fixes #2208. Stateful Streamable HTTP sessions start the server task group on the first request. Anyio copies the request contextvars into that long-lived task, so get_access_token() could keep ret...

X Description: Fixes #2208. Stateful Streamable HTTP sessions start the server task group on the first request. Anyio copies the request contextvars into that long-lived task, so get_access_token() could keep ret...

Opengraph URL: https://github.com/modelcontextprotocol/python-sdk/pull/2675

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b6391a6 fix(auth): make get_access_token per-request in stateful sessions Epochex May 24, 2026 https://github.com/modelcontextprotocol/python-sdk/pull/2675/commits/b6391a6a5d7cd921e4c21670c31adeada166d906
e09a904 fix(auth): avoid Request.user assertion without auth middleware Epochex May 24, 2026 https://github.com/modelcontextprotocol/python-sdk/pull/2675/commits/e09a9047677fc506d2fc57b8da318e0fd6690df5
ea2e90c chore(auth): type-safe auth context push Epochex May 24, 2026 https://github.com/modelcontextprotocol/python-sdk/pull/2675/commits/ea2e90ca9bd717db84c2f3ca33e0a6803bc398df
10fa2de fix auth context reset for streamable HTTP Epochex May 24, 2026 https://github.com/modelcontextprotocol/python-sdk/pull/2675/commits/10fa2dec3651462009ca04819335b52d0ca01c3a
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