I originally did something like this; however, went after it a slightly different way with the rest sensor. See Need help storing URL for use in generic IP camera (over 255 chars) - #2 by lmamakos for a reference to that. That’s been more than a couple years ago; perhaps the rest sensor thing has changed somewhat since then to allow multiple sensors to be evaluated for each JSON response? I don’t know if that was a thing at the time, or I just missed it.