I suspect right now the only documentation is at http://localhost:8088/openapi or http://localhost:8088/openapi.json.
e.g. the scan endpoint is documented at http://localhost:8088/openapi#tag/config-management/paths/\\\\\\\~1data\\\\\\\~1api\\\\\\\~1v1\\\\\\\~1scan\\\\\\\~1projects/post
At some point there should be a scripting interface to some/all of the REST API as well. @paul-griffith can speak to that more than I can.