HAZOTA

This plugin publishes a simple endpoint at <code>/kmut.txt</code> on your site to expose your account identifier for seamless integration with KissMyUpTime’s completely free uptime monitoring service.
A <a href="https://kissmyuptime.com" rel="nofollow ugc">KissMyUpTime</a> account is required, and you can create one for free – no personal data required.
KissMyUpTime offers a real-time interface and instant notifications across all your devices, along with precise uptime percentage calculations, an unlimited number of checks, boostable intervals, and multiple nodes around the world.

KissMyUpTime

Helps you easily integrate KissMyUpTime's completely free uptime monitoring service with your WordPress site.

Scott Nelle

Uptime Robot uses the uptimerobot.com API to display log messages relating to a site’s uptime. You must have a free uptimerobot.com account to get any use from this plugin.

Uptime Robot

A dashboard widget for monitoring your uptimerobot.com log messages

KissMyUpTime vs Uptime Robot