What is OpenAPI?
OpenAPI (formerly known as Swagger) is an open-source specification for building and documenting RESTful APIs. REST (Representational State Transfer) is a style of web architecture that uses HTTP requests to access and manipulate data. OpenAPI allows developers to describe the structure and functionality of their APIs in a standard, machine-readable format, which can be used to automatically generate documentation, code, and other tools. The specification is based on JSON or YAML and includes information about endpoints, operations, parameters, headers, and response codes, among other things. OpenAPI can be used to ensure consistency and interoperability across different API implementations and can be helpful for both API providers and consumers in understanding how an API works and how it can be used.