This post is over 5 years old, so I guess I'll ask the question.
Did Solarwinds ever come out with an API with any of its latest releases?
Version 9.5 is the latest version and no we have not released an API. What specifically are you looking to accomplish?
I don't know about anyone else, but our programmer specifically asked about an API to add/remove/modify sub/supernets and IPs from IPAM. He can certainly create his own functions to do all the work involved, but his concern is that changes to IPAM will break his app, and potentially break IPAM in return.
As the IPAM PM I will log that as a feature request for IPAM