Swagger is a set of tools for designing, building, and documenting RESTful APIs. It includes a specification for describing the API and a set of tools for generating documentation, client libraries, and server stubs for the API.
The Swagger specification is a way to describe the structure and operation of a RESTful API using a common language that is easy to read and understand. It includes details such as the endpoints of the API, the parameters that can be passed to each endpoint, and the responses that the API can return.
The Swagger tools include a specification editor, a documentation generator, and code generators for various programming languages. These tools can be used to design and document an API, generate client libraries and server stubs for the API, and test the API using a built-in API explorer.
You can find more information about Swagger and how to use it in the Swagger documentation.