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Title: [codex] Add default Origin for streamable HTTP client by tarunag10 · Pull Request #2759 · modelcontextprotocol/python-sdk · GitHub

Open Graph Title: [codex] Add default Origin for streamable HTTP client by tarunag10 · Pull Request #2759 · modelcontextprotocol/python-sdk

X Title: [codex] Add default Origin for streamable HTTP client by tarunag10 · Pull Request #2759 · modelcontextprotocol/python-sdk

Description: Summary derive a default Origin from the streamable HTTP target URL send that origin on streamable HTTP requests when the caller has not configured one preserve caller-provided Origin headers and avoid mutating provided httpx.AsyncClient headers Validation uv run pytest tests/shared/test_streamable_http.py -k "default_origin or preserves_custom_origin" uv run pytest tests/shared/test_streamable_http.py uv run ruff check src/mcp/client/streamable_http.py tests/shared/test_streamable_http.py uv run ruff format --check src/mcp/client/streamable_http.py tests/shared/test_streamable_http.py Addresses #2727.

Open Graph Description: Summary derive a default Origin from the streamable HTTP target URL send that origin on streamable HTTP requests when the caller has not configured one preserve caller-provided Origin headers and ...

X Description: Summary derive a default Origin from the streamable HTTP target URL send that origin on streamable HTTP requests when the caller has not configured one preserve caller-provided Origin headers and ...

Opengraph URL: https://github.com/modelcontextprotocol/python-sdk/pull/2759

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a0c5aba Add default Origin for streamable HTTP client tarunag10 Jun 2, 2026 https://github.com/modelcontextprotocol/python-sdk/pull/2759/commits/a0c5abaac1f9a5ab819b54f97d458a855cffcc6f
802bd53 test: cover default origin fallback cases tarunag10 Jun 5, 2026 https://github.com/modelcontextprotocol/python-sdk/pull/2759/commits/802bd535cbf78a8573fdfc9db02083b1953a87e6
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