SDK for Jabber Desktop Client Version

There are no APIs/SDKs for controlling the Jabber PC client directly.

However, via the Jabber SDK () you can either implement a stand-alone Jabber SDK-based 'softphone', or monitor/control a regular CUCM device (including a Jabber PC client which is itself in softphone mode.)

https://developer.cisco.com/site/jabber-websdk/overview/

If implementing a browser-based softphone via the SDK, you would have control over call-handling, video calling, and mic+audio output; though, screen-sharing is not supported.  If using the Jabber SDK to remote-control a Jabber PC client (in softphone mode), then only call control operations would be supported (no control of audio/video, or additional features like screensharing)