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Title: fix: preserve OAuth authorization endpoint query params by Zhang-986 · Pull Request #2819 · modelcontextprotocol/python-sdk · GitHub

Open Graph Title: fix: preserve OAuth authorization endpoint query params by Zhang-986 · Pull Request #2819 · modelcontextprotocol/python-sdk

X Title: fix: preserve OAuth authorization endpoint query params by Zhang-986 · Pull Request #2819 · modelcontextprotocol/python-sdk

Description: Summary preserve existing query parameters on OAuth authorization endpoints when building the redirect URL append SDK-generated authorization request parameters with proper URL query encoding add a regression test for authorization endpoints such as /authorize?prompt=select_account Fixes #2776. Tests uv run --frozen pytest tests/client/test_auth.py -k authorization_endpoint_query_params_are_preserved (fails before the fix, passes after) uv run --frozen pytest tests/client/test_auth.py uv run --frozen ruff check src/mcp/client/auth/oauth2.py tests/client/test_auth.py uv run --frozen pyright src/mcp/client/auth/oauth2.py tests/client/test_auth.py git diff --check

Open Graph Description: Summary preserve existing query parameters on OAuth authorization endpoints when building the redirect URL append SDK-generated authorization request parameters with proper URL query encoding add ...

X Description: Summary preserve existing query parameters on OAuth authorization endpoints when building the redirect URL append SDK-generated authorization request parameters with proper URL query encoding add ...

Opengraph URL: https://github.com/modelcontextprotocol/python-sdk/pull/2819

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f20ccb6 fix: preserve auth endpoint query params Zhang-986 Jun 8, 2026 https://github.com/modelcontextprotocol/python-sdk/pull/2819/commits/f20ccb650319a67ae3a0945eae36ab46cf57f752
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