I am looking to see if there is a simple API call to determine if the sprinkler system is running (ie - outputting water to any zone for any reason). I know I can look at each zone specifically, but I just need to know if my sprinklers are running at all.
/public/device/:id/current_schedule does not appear to show me anything but the upcoming schedule even when I am running in manual mode.
@rjsears@Khillski 's idea of using IFTTT could definitely work for you.
If you want to use the open API the correct endpoint is /public/device/:id/current_schedule. This will only return information when a schedule is running.