Docusaurus maintainer here. I don't really understand what you mean, considering we don't have official support for API documentation, but have a plugin system allowing you to build your own support.

And we have a few OpenAPI plugins, and redocusaurus.

A Docusaurus plugin MDX makes it possible to implement this with client-side React in case you want to create an interactive client alongside editorial text content.

See what Courier did just using React in MDX, and without any Docusaurus plugin: https://www.courier.com/blog/how-we-built-our-documentation/ https://www.courier.com/docs/reference/send/message/ (their site is opensource)