Sharptools Rule Engine IP Address range for HTTP actions

I have a rule that is making a call to a server that I manage. I have it using Basic Authentication but I want to lock access down on the firewall so someone doesn’t crack the auth and send all kinds of messages to the audio system.

Does anyone know the IP ranges of the servers SharpTools uses to execute HTTP actions?

We don’t have a documented / fixed set of IP address ranges that outbound HTTP requests are made from. Most of our platform runs on Google Cloud and scales up and down dynamically, but they have a pretty massive set of IP ranges.