API

API (Application Programming Interface) is a core concept in modern software development that allows different applications to communicate with each other. APIs enable data exchange between servers, websites, mobile apps, and third-party services in a secure and efficient way. This category covers REST APIs, JSON, HTTP methods, authentication, real-world API examples, and best practices used in web and app development.

A diagram illustrating how REST APIs work, showing the flow of an HTTP request from a client device through an API to a server and database, and the return of an HTTP response.

How REST APIs Work

What Is a REST API? When REST APIs finally clicked for me, it wasn’t because I read a perfect explanation. It was because I kept seeing the same pattern while building things — ask clearly, get a clear response; mess it up, and the system pushes back immediately. That pushback is actually the point. In

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