OpenAPI Specification (formerly Swagger)

The OpenAPI Specification (formerly Swagger) is a standardized way for developers to describe and document RESTful APIs, which are systems that allow different software to communicate over the internet. It provides a clear, machine-readable blueprint that details how the API works—like available endpoints, data formats, and operations—making it easier for developers to understand, test, and integrate with that API. This promotes consistency, reduces errors, and streamlines the development process across teams and applications.