UptimeRobot

Cookipedia uses, and recommends UptimeRobot.

It's free and very, very useful!

There are other systems available to do the same job, but they are not free and why pay for a service when you can get it for nothing.

https://uptimerobot.com/

Ps: Unlike other providers, UptimeRobot does not continually pester you with spam! 🤓

#uptimerobot