What is the connection between REST API documentation and the Swagger tool?

Swagger is a tool and a specification for describing REST APIs. It allows documenting APIs in a standardized format (OpenAPI Specification), which is easy to read for both humans and machines.

The connection between REST API documentation and Swagger is that Swagger helps automatically generate and maintain up-to-date documentation for REST services. With Swagger, you can:

• Describe all available endpoints, methods, parameters, and data models.
• Automatically create interactive documentation where requests can be tested.
• Generate client code for different languages based on the specification.

Thus, Swagger significantly simplifies the process of creating, maintaining, and using REST APIs, making documentation transparent and convenient for developers and testers.