Spring Security + OAuth2 Resource Server: How to Validate JWTs Like a Pro

OAuth2 and JWT (JSON Web Tokens) have become the standard for securing APIs in modern microservices and web applications. When building a resource server with Spring Security, properly validating incoming JWTs is essential for security and performance. In this article, we’ll deep dive into how to configure JwtDecoder, introspect tokens when needed, and enforce scopes …

May 28, 2025 - 08:20

OAuth2 and JWT (JSON Web Tokens) have become the standard for securing APIs in modern microservices and web applications. When building a resource server with Spring Security, properly validating incoming JWTs is essential for security and performance. In this article, we’ll deep dive into how to configure JwtDecoder, introspect tokens when needed, and enforce scopes …