Add conformance auth server for OAuth server authentication testing #1855
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Adds a new example server that implements OAuth bearer token authentication
for use with the MCP conformance test framework's server auth tests.
The server:
- Returns 401 with WWW-Authenticate header for unauthenticated requests
- Serves Protected Resource Metadata at /.well-known/oauth-protected-resource
- Validates tokens starting with 'test-token' or 'cc-token'
- Implements echo and test-tool tools for testing authenticated calls
Usage:
MCP_CONFORMANCE_AUTH_SERVER_URL=http://localhost:3000 \
uv run mcp-conformance-auth-server
Replace the hardcoded token prefix validation with OAuth 2.0 Token Introspection (RFC 7662). The server now: - Discovers the introspection endpoint from AS metadata - Calls the introspection endpoint to validate each token - Extracts client_id, scopes, and expiry from the response This properly integrates with the authorization server rather than relying on hardcoded token patterns.
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Summary
Adds a new example server that implements OAuth bearer token authentication for use with the MCP conformance test framework's server auth tests (see modelcontextprotocol/conformance#105).
What's New
examples/servers/conformance-auth-server//.well-known/oauth-protected-resourceechoandtest-tooltools for testing authenticated callsToken Validation
The server validates tokens using proper token introspection:
active=true, rejects otherwiseThis ensures proper integration with the authorization server rather than relying on hardcoded token patterns.
Usage
Testing
Tested against conformance PR #105 - all 18 checks pass: