OpenAPI

OpenAPI, formerly known as Swagger, is an open-source specification for building APIs (Application Programming Interfaces). It defines a standard, language-agnostic way to describe RESTful APIs, which allows for the creation of APIs that are easily understood and consumed by humans and computers.

The OpenAPI specification is based on the use of JSON (JavaScript Object Notation) or YAML (YAML Ain't Markup Language) to describe the structure of an API, including its endpoints, operations, and input and output parameters. It also includes support for documenting the API, including its purpose, use cases, and any other relevant information.

OpenAPI is used to generate API documentation, as well as to generate code for client libraries and server stubs in a variety of programming languages. It is supported by a range of tools and libraries, including the OpenAPI Generator and the OpenAPI specification editor, which make it easier to work with and develop APIs that follow the specification.