This is the OpenAPI backend of the IvyEngine. It describes all the REST services of an IvyEngine and its projects in OpenAPI compatible format. Furthermore we ship the swagger UI for it, so that clients can directly experiment with the resources being described.
https://dev.axonivy.com/news/9.2
The creation of an openapi.json specification was built for 9.2 and is not available on any earlier version of the ivy-engine.
But there is nothing that should hinder you to use our Leading Edge release, if you need these brand new features of it.
The OpenAPI features will be parts of the LTS 10 version and receive regular updates. Until LTS 10 is ready, we have leading edge release to make them available for early adopters.