CIMD Implementation #580
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CIMD Implementation #580
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Implements support for Client ID Metadata Documents (CIMD) as defined in
the MCP 2025-11-25 specification. CIMD allows clients to use an HTTPS URL
as their OAuth client_id, enabling decentralized client registration.
Changes:
- Add client_metadata_url field to MCPServerAuthSettings with validation
- Pass client_metadata_url to OAuthClientProvider for CIMD-aware OAuth
- Add comprehensive tests for CIMD configuration and integration
Configuration example:
mcp:
servers:
my-server:
url: https://example.com/mcp
auth:
client_metadata_url: https://myapp.com/oauth/client.json
Implement dynamic port binding for OAuth callback server to handle port conflicts gracefully. Per RFC 8252 Section 7.3, authorization servers MUST allow any port for loopback IP (127.0.0.1) redirect URIs. Changes: - Use 127.0.0.1 instead of localhost for RFC 8252 compliance - Try preferred port first, then fallback ports (3031, 3032, 8080), then ephemeral port (0) if all are busy - Register multiple redirect_uris with fallback ports for servers that don't fully implement RFC 8252's dynamic port matching - Add get_redirect_uri() method to get actual bound port - Add comprehensive tests for port fallback behavior
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