There seems to be some sort of trigger string sent over the system dbus when an alarm goes off. I set two alarms and got their cookies by searching for the pair "enabled","1" (This filter probably needs to be refined with the pair "STATE","QUEUED")
I'm aware that I can just use PM to play a sound at a set time and execute an action but I lose the snooze function, recurrence and a nice enabled/disabled switch in the UI () if I do it like that.