What is a REST API?
A REST API defines how clients (like web or mobile apps) interact with servers using a set of consistent principles rather than a strict protocol. Each API endpoint represents a resource - such as a user, order, or ticket - and HTTP methods determine the action performed on that resource. Unlike complex SOAP APIs, REST APIs are lightweight and human-readable, typically exchanging data in JSON format. They are also stateless, meaning each request contains all information needed for the server to process it - simplifying scalability and reliability.
It enables applications to exchange data using simple, stateless operations - commonly through methods such as GET, POST, PUT, and DELETE. REST APIs provide the foundation for modern web and mobile applications, powering everything from e-commerce platforms to SaaS integrations.
How REST APIs Work
- Client Request:
A client (browser, app, or script) sends an HTTP request to a specific endpoint. - Server Processing:
The server interprets the request, performs the necessary operations, and accesses resources such as databases. - Response:
The server returns a structured response - often JSON or XML - along with an HTTP status code (e.g.,200 OK,404 Not Found,500 Internal Server Error). - Statelessness:
Each request is independent, ensuring scalability and simplicity across distributed systems.
