What is the essence of the REST principle?

REST (Representational State Transfer) principle is an architectural style for building distributed systems, particularly web services.

Main ideas of REST:

• Client-server architecture: client and server are separated, which simplifies development and scaling.
• Stateless: each request from the client to the server must contain all the necessary information, and the server does not store state between requests.
• Cacheability: server responses can be explicitly marked as cacheable or not to improve performance.
• Uniform interface: standardized interaction methods (e.g., HTTP methods GET, POST, PUT, DELETE) and a consistent resource representation.
• Layers: architecture can consist of multiple levels that do not know about each other directly.

The essence of REST is creating simple, scalable, and easily maintainable APIs, where resources are represented as URLs, and operations on them are performed using standard HTTP methods.