What is the Stateless rule?

The Stateless rule means that each request from a client to a server must contain all the necessary information for its processing, without the server storing any state between requests. This is a key principle of RESTful architecture, which simplifies scaling and increases fault tolerance, as the server does not depend on previous interactions with the client.

For example, if a client sends a request to retrieve data, it must include all parameters and authentication data in the request so that the server can process the request independently of previous requests.