Programmatically determine user availability

[weave]

I'd like to somehow programmatically determine the availability of an extension. Everything I've searched for regarding an API focuses on the 3CX system using some other system's API as a client, like a CRM. Is there an API for controlling the 3CX itself? Or is there another method I can use to find this out? I've read elsewhere that accessing the database directly is strongly discouraged, even if just a query, due to the realtime nature of the software.

My incoming calls are handled by Twilio and I'd like to have Twilio scripts query extension availability and then based on that, route calls to where it's most appropriate.