Thanks. No way to do it with the "new" rules engine?

Hi all,
Same issue for me.
I would like a rule to trigger when I call
http://<myip>/control?cmd=event,open_cover

Unfortunatly, I don't know what to put as event name in the new rules engine.
Tried several things, none works (event#open_cover, http#open_cover) ...
Any clue, idea?