mcp-auth-fastapi-fastmcp-scalekit

To add OAuth authentication to a FastAPI and FastMCP application, use this Skill to implement an HTTP middleware gateway that validates Bearer tokens via Scalekit and mounts FastMCP tooling securely under the root path.

Validating Bearer tokens with Scalekit in FastAPI requires the environment variables SK_ENV_URL, SK_CLIENT_ID, SK_CLIENT_SECRET, EXPECTED_AUDIENCE, and PROTECTED_RESOURCE_METADATA to configure the authentication middleware.

Yes, the OAuth middleware exposes a public discovery endpoint at /.well-known/oauth-protected-resource to facilitate secure access control and Scalekit token validation across existing FastAPI apps.

Yes, you can integrate MCP tooling into existing FastAPI apps by mounting FastMCP under the root path, enabling the addition of custom routes and middleware alongside the Scalekit OAuth validation gateway.

You need Scalekit to handle token validation for FastAPI projects because it provides a secure, scalable OAuth authentication mechanism via a dedicated HTTP middleware gateway, simplifying access control across new and existing deployments.