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Title: fix(auth): validate redirect_uri schemes at DCR registration (RFC 9700 §4.1.1, RFC 7591 §2) by CrypticCortex · Pull Request #2630 · modelcontextprotocol/python-sdk · GitHub

Open Graph Title: fix(auth): validate redirect_uri schemes at DCR registration (RFC 9700 §4.1.1, RFC 7591 §2) by CrypticCortex · Pull Request #2630 · modelcontextprotocol/python-sdk

X Title: fix(auth): validate redirect_uri schemes at DCR registration (RFC 9700 §4.1.1, RFC 7591 §2) by CrypticCortex · Pull Request #2630 · modelcontextprotocol/python-sdk

Description: The official Python SDK for Model Context Protocol servers and clients - fix(auth): validate redirect_uri schemes at DCR registration (RFC 9700 §4.1.1, RFC 7591 §2) by CrypticCortex · Pull Request #2630 · modelcontextprotocol/python-sdk

Open Graph Description: Closes #2629. Summary Adds validate_registered_redirect_uri(url: AnyUrl) and wires it into RegistrationHandler.handle so each submitted redirect_uri is validated immediately after model_validate_js...

X Description: Closes #2629. Summary Adds validate_registered_redirect_uri(url: AnyUrl) and wires it into RegistrationHandler.handle so each submitted redirect_uri is validated immediately after model_validate_js...

Opengraph URL: https://github.com/modelcontextprotocol/python-sdk/pull/2630

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og:image:altCloses #2629. Summary Adds validate_registered_redirect_uri(url: AnyUrl) and wires it into RegistrationHandler.handle so each submitted redirect_uri is validated immediately after model_validate_js...
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fix(auth): validate redirect_uri schemes at DCR registration (RFC 9700 §4.1.1, RFC 7591 §2)https://github.com/modelcontextprotocol/python-sdk/pull/2630#top
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May 18, 2026https://github.com/modelcontextprotocol/python-sdk/pull/2630#issue-4468923733
#2629https://github.com/modelcontextprotocol/python-sdk/issues/2629
Fix RFC 8252 Section 7.3 compliance for loopback redirect URIs #1934https://github.com/modelcontextprotocol/python-sdk/pull/1934
Question: MCP Python SDK Redirect URI Validation - Implementation Granularity? #1446https://github.com/modelcontextprotocol/python-sdk/issues/1446
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feat(auth): add validate_registered_redirect_uri helperhttps://github.com/modelcontextprotocol/python-sdk/pull/2630/commits/3ee84a96a8ed0fda85f5c06bd1dc93315e12c847
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fix(auth): reject empty-fragment redirect_uri (RFC 7591 §2)https://github.com/modelcontextprotocol/python-sdk/pull/2630/commits/35df94476bcc981c4a6c0dee2251eee00ef20ca2
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fix(auth): reject non-spec redirect_uris in DCR handlerhttps://github.com/modelcontextprotocol/python-sdk/pull/2630/commits/759c9be25488abe2e052399afccb22841bc0549e
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May 27, 2026 https://github.com/modelcontextprotocol/python-sdk/pull/2630#ref-issue-4523536290
OAuthClientInformationFull.redirect_uris: pydantic strict-type-equality breaks AnyUrl(x) != AnyHttpUrl(x) round-trip #2687 https://github.com/modelcontextprotocol/python-sdk/issues/2687
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DCR registration accepts redirect_uris with non-HTTPS / non-loopback / fragmented schemes https://github.com/modelcontextprotocol/python-sdk/issues/2629
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