better-auth-jwt-integration

JWT authentication across Next.js and FastAPI is implemented by configuring Better Auth with a JWT plugin on the frontend and setting up JWT verification middleware on the backend. This integration generates, verifies, and manages tokens to secure API access and sync user sessions.

Better Auth handles stateless API security by generating JSON Web Tokens upon user sign-in, verifying these tokens during API requests, and managing token refresh cycles. User claims within the JWT dictate API access control across frontend and backend services.

Managing user sessions with JWT involves generating tokens on authentication, verifying them on the server, and refreshing them periodically. This approach maintains consistent authentication state and protected routes across both client and server components.

Yes, Better Auth can protect API routes by verifying JWT tokens and extracting user claims to enforce access control. It integrates with FastAPI middleware to secure backend endpoints and ensure only authorized users access personalized data.

You do not need a separate service for token refresh, as this Skill handles JWT generation, verification, and token refresh internally. It coordinates session management directly between the Next.js frontend and FastAPI backend services.

A FastAPI backend rejects Next.js JWTs when verification middleware is misconfigured or token signatures mismatch. Secure authentication requires syncing the JWT plugin configuration and secret keys across both frontend and backend environments.