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Fix OAuth metadata validation for compliant servers #778

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Fix OAuth metadata validation for compliant servers #778

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4 changes: 2 additions & 2 deletions src/mcp/shared/auth.py
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Original file line number Diff line number Diff line change
Expand Up @@ -117,7 +117,7 @@ class OAuthMetadata(BaseModel):
list[Literal["authorization_code", "refresh_token"]] | None
) = None
token_endpoint_auth_methods_supported: (
list[Literal["none", "client_secret_post"]] | None
list[Literal["none", "client_secret_post", "client_secret_basic"]] | None
) = None
token_endpoint_auth_signing_alg_values_supported: None = None
service_documentation: AnyHttpUrl | None = None
Expand All @@ -134,4 +134,4 @@ class OAuthMetadata(BaseModel):
list[Literal["client_secret_post"]] | None
) = None
introspection_endpoint_auth_signing_alg_values_supported: None = None
code_challenge_methods_supported: list[Literal["S256"]] | None = None
code_challenge_methods_supported: list[Literal["S256", "plain"]] | None = None
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