The OpenAPI Specification defines the interfaces for RESTful APIs, describing resources and operations in a format that is easily discoverable and understandable by both machines and humans. It is a common way to unify how an industry defines and describes APIs — the services fundamental to how applications talk to each other in today’s connected world.
Download OpenAPI Specification
More information about OpenAPI 3.0 can be found here:
- https://github.com/OAI/OpenAPI-Specification
- https://swagger.io/docs/specification/about/
- https://en.wikipedia.org/wiki/OpenAPI_Specification