What is OpenAPI?
OpenAPI is a standard format for describing REST APIs. It lets tools generate interactive documentation, client SDKs, server stubs, and tests from a single source of truth. If you are new to OpenAPI, OpenAPI.Info is a comprehensive reference.The PlexAPI.dev specification
The canonical specification is maintained in the plex-api-spec repository asplex-api-spec.yaml. It describes the Plex Media Server endpoints, request parameters, response shapes, authentication, and error handling that the docs and SDKs rely on.