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.

nabtron

Show average server load and uptime of your linux server on top in admin panel. It contains three values, first one is the load average for last 15 minutes, second one is for 5 minutes, third one is for last 1 minute.
Now you can easily monitor your server load in real time whenever you want without installing any script or moving out of your wordpress admin panel.
Options include turn off, on or legacy mode.
It shows:
<ul>
<li>3 averages for server load</li>
<li>server uptime in days and hours</li>
<li>Memory usage in %age</li>
</ul>
If useful – Future versions are planned to have more options, so please leave a feedback
Found a bug or have a feature request ? <a href="https://nabtron.com/wp-server-plugin/" rel="nofollow ugc">Report here</a>

WP Server

Show average server load and uptime of your linux server on top in admin panel

KissMyUpTime vs WP Server