WP OpenAPI is a WordPress plugin to provide the OpenAPI spec and a beautifu viewer for your WordPress REST API.
WP OpenAPI is a WordPress plugin that generates OpenAPI 3.1.0 compatible documentation for your WordPress REST APIs.
It has two main features.
You can also export your documentation as a single HTML to host it in a server easily.
See more details at https://github.com/moon0326/wp-openapi