Title: Fix on streamable‑http auth drop on Azure by AlesoGio · Pull Request #1110 · modelcontextprotocol/python-sdk · GitHub
Open Graph Title: Fix on streamable‑http auth drop on Azure by AlesoGio · Pull Request #1110 · modelcontextprotocol/python-sdk
X Title: Fix on streamable‑http auth drop on Azure by AlesoGio · Pull Request #1110 · modelcontextprotocol/python-sdk
Description: Replaced all Mount(self.settings.streamable_http_path, …) registrations with Route(self.settings.streamable_http_path, endpoint=…, methods=["POST","GET","DELETE"]) to eliminate the automatic 307 redirect and ensure the Authorization header is preserved on public deployments. Motivation and Context During the 307 redirect from/mcp to /mcp/, many HTTP clients drop sensitive headers like Authorization when following external redirects. Locally, Uvicorn + HTTPX transparently reattach headers, so the bug only appeared when I distributed the server on Azure. Switching to Route removes the redirect entirely, preserving end‑to‑end authentication and restoring expected behavior of the streamable‑http transport. How Has This Been Tested? Local: verified with MCP Inspector that /mcp and /mcp/ calls succeed without dropping headers. Azure: deployed to Azure App Service, exercised full OAuth flow and MCP Inspector connect; confirmed no 307 redirect and successful streamable‑http sessions. Breaking Changes None. This is a transparent change to route registration. Existing clients can continue calling /mcp or /mcp/ with no code or configuration updates. Types of changes Bug fix (non-breaking change which fixes an issue) New feature (non-breaking change which adds functionality) Breaking change (fix or feature that would cause existing functionality to change) Documentation update Checklist I have read the MCP Documentation My code follows the repository's style guidelines New and existing tests pass locally I have added appropriate error handling I have added or updated documentation as needed Additional context
Open Graph Description: Replaced all Mount(self.settings.streamable_http_path, …) registrations with Route(self.settings.streamable_http_path, endpoint=…, methods=["POST","GET","DELETE"]) to ...
X Description: Replaced all Mount(self.settings.streamable_http_path, …) registrations with Route(self.settings.streamable_http_path, endpoint=…, methods=["POST","GET",&quo...
Opengraph URL: https://github.com/modelcontextprotocol/python-sdk/pull/1110
X: @github
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