REST APIs (Representational State Transfer Application Programming Interfaces) are a standardized approach to building web services that allow systems to communicate over the HTTP protocol. Based on REST architecture principles, REST APIs treat server resourcessuch as data objects or servicesas resources that can be accessed and manipulated using standard HTTP methods like GET, POST, PUT, and DELETE. These APIs are designed to be stateless, meaning each client request must contain all the necessary information for the server to process it, eliminating the need to store client state on the server. REST APIs are widely used due to their simplicity, scalability, and flexibility, making them ideal for modern web applications, mobile apps, and cloud services.
REST APIs are commonly employed to enable data exchange between different systems, allowing developers to create integrations and microservices architectures. They facilitate operations like retrieving data, submitting forms, updating resources, and deleting records in a structured and predictable manner. REST APIs use JSON or XML for data formatting, with JSON being the most popular due to its readability and efficiency. Their lightweight nature and ease of implementation have made REST APIs a dominant standard for building distributed systems, third-party integrations, and public APIs for platforms like Twitter, GitHub, and Google Maps.