betterauth-fastapi-jwt-bridge

To verify Better Auth JWTs in FastAPI, you use JWKS-based signature verification. This approach fetches public keys from your Better Auth JWKS endpoint to validate tokens and enable per-route user isolation.

JWKS-based JWT verification validates tokens using public keys from a JSON Web Key Set endpoint. You need it when bridging authentication from a frontend like Next.js to a FastAPI backend to ensure production-grade signature validation.

You set up per-route user isolation in FastAPI by implementing a verification module that intercepts requests, validates the JWT against the JWKS endpoint, and isolates user context for each specific route.

Yes, the Better Auth JWT plugin requires an active JWKS endpoint. FastAPI integration depends on this endpoint to fetch the public keys needed for verifying token signatures and authorizing users.

Bridging Better Auth and FastAPI using JWKS requires the httpx and python-jose dependencies. These libraries handle the HTTP requests to the JWKS endpoint and the cryptographic JWT verification respectively.

Yes, you can use Better Auth for authentication and FastAPI for authorization without a shared database. The FastAPI backend verifies user identity strictly through JWT signatures fetched via JWKS.