Express OAuth2 JWT Bearer

Authentication middleware for Express.js that validates JWT Bearer access tokens issued by an OAuth 2.0 authorization server. Version 1.8.0 supports DPoP (Proof-of-Possession) authentication, multiple custom domains, clock tolerance for nbf claim, and Node.js versions 12 through 24. Maintained by Auth0 with 100% test coverage. Differentiates from other JWT middleware by being Auth0-optimized, supporting OAuth 2.0 token validation (not just JWT decoding), and providing built-in security headers guidance.