auth0-fastapi-api

To validate Auth0 JWT access tokens in FastAPI, instantiate an Auth0FastAPI object and apply the require_auth dependency to your routes. This verifies the issuer, audience, and signature via JWKS, returning decoded claims for use in your handlers.

You enforce scope and permission checks on FastAPI endpoints by applying the require_auth dependency with required scopes. It returns a 403 error when clients present access tokens missing the necessary scopes or permissions for the targeted route.

Yes, you can use DPoP proof-of-possession tokens to protect FastAPI APIs. The Skill accepts or requires DPoP-bound tokens to prevent token replay and misbound tokens, including timing leeway configuration and proxy trust settings for correct validation.

Before validating Auth0 tokens with FastAPI, you need Python 3.9+, FastAPI >=0.115.11, an Auth0 API resource with the correct audience, and the environment variables AUTH0_DOMAIN and AUTH0_AUDIENCE configured in your deployment environment.

FastAPI APIs often reject valid SPA access tokens due to common mistakes like hardcoding the Auth0 domain or audience, manual JWT parsing, or incorrectly using ID tokens for API authorization instead of validating access tokens with the correct audience.

Yes, auth0-fastapi-api supports protecting routes for mobile app clients. It validates Bearer and DPoP access tokens from SPAs, mobile apps, or other clients, providing authentication, authorization, and scope enforcement for your REST APIs.