I'm keen on your idea for an out-of-band mechanism, and would be needed for the obfuscated URL idea "For the more gung-ho, obfuscate the URL and use SSL (e.g.

I'm keen on your idea for an out-of-band mechanism, and would be needed for the obfuscated URL idea "For the more gung-ho, obfuscate the URL and use SSL (e.g. https://yoursite.tld/something-unguessable/monitors.txt https://yoursite.tld/something-unguessable/monitors.txt) and tell your provider where to find your monitors.txt"