In what cases is it recommended to use REST API for interaction between system components?

REST API is recommended for interaction between system components in the following cases:

• When components are distributed and may be on different servers or platforms.
• If a standardized, simple, and understandable data exchange protocol is required (usually HTTP with JSON or XML).
• When scalability and component independence are important.
• If compatibility with a wide range of clients (web, mobile applications, other services) is needed.
• When caching and the use of standard HTTP methods (GET, POST, PUT, DELETE) are necessary.

Example: microservices architecture, where each service provides a REST API for interaction with other services or the frontend.