We have over 300 Arista NGFW (Untangle) deployed across our environments. Untangle is built on PF Sense, so it should be relatively easy for you to implement. I tried the PF Sense inspector, but it didn't work. Additionally, there's a command center for centralized parent/child management, but I'm unsure of its API Capabilities.

Arista NGFW (Untangle) be added as an inspector.