REST (Representational State Transfer) API is an architectural style for designing networked applications. REST APIs use HTTP methods (GET, POST, PUT, DELETE) to perform operations on resources identified by URLs. Each resource is represented in a standard format like JSON or XML. REST is stateless—each request contains all information needed to process it—and follows principles of uniform interface, client-server separation, and layered architecture. REST APIs enable microservices communication, mobile app backends, and third-party integrations.
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