The OpenAPI initiative is part of the Linux Foundation and defines the OpenAPI Specification (OAS) standard. The OpenAPI Specification aims to provide a language-agnostic interface for REST APIs. This kind of approach guarantees that both humans and client applications understand and discover the capabilities of a web service by referring to a unique entry point. In addition, it provides a high-level abstraction that can also be used for business or design purposes.
Furthermore, its standard way of querying services facilitates every kind of automation – from the autogeneration of a client to the autogeneration of the documentation.