Neat! I definitely read the name as "Peeing" and was confused. (Most people parse words using the first few letters and last few letters when they scan.)

The blurb on the site was difficult for me to parse, mentally. It's wordy and awkward with the negative in there:

> Receive an HTTP request whenever your heartbeat endpoint is not pinged for a configured interval of your choice.

"Get POSTed when your endpoint stops receiving a ping." is where I got to after reading your description here, but it's sorta unclear what "your endpoint" means (it's ambiguous, is it my site's endpoint? or my "peeng endpoint"?)