You need a Smart App that manages those devices. Either creates them as child devices, or accesses them through a Settings input. What alarm system are we talking about?
Not sure about that. I have an app here that does what you want, albeit on different services. Are you logging in to a public facing server to read the devices, or is it in your local network?
You’ll find in that app:
httpGet/httpPost to perform your login (it logs in to MyQ and AT&T, you’ll need to figure out your details)
sendEvent - uses that to send events to the child devices it generated (as part of device discovery) - device.sendEvent(name, value) - that’s how you update the devices.
Set a cron schedule to every 5 minutes and login, get the info, use sendEvent on your devices. This is pretty much the workflow.
Good luck, let us know if you get stuck, this community here is great at providing such support.