Good API documentation is non-negotiable. Springdoc reads your Spring MVC code and auto-generates interactive OpenAPI 3.1 documentation — no separate doc files to maintain. Setup <dependency> <groupId>org.springdoc</groupId> <artifactId>springdoc-openapi-starter-webmvc-ui</artifactId> <version>2.5.0</version> </dependency> Start the app and visit: Swagger UI: http://localhost:8080/swagger-ui.html OpenAPI JSON: http://localhost:8080/v3/api-docs OpenAPI YAML: http://localhost:8080/v3/api-docs.yaml Springdoc scans your @RestController classes and generates the spec automatically. Zero configuration needed for basic docs. Configuring the API Info @Configuration public class OpenApiConfig { @Bean public OpenAPI openAPI() { return new OpenAPI() .