jamesmortensen/health-check-action

This is a tool that automatically checks whether a website is up and running. You add it to your GitHub workflow (a series of automated tasks that run when you push code or on a schedule), point it at your website's URL, and it will test whether the site is reachable. If the site responds within the time limit, the check passes. If it doesn't respond, the workflow fails and you know there's a problem. The action works by sending a simple request to your website using either curl or wget, two common command-line tools for fetching web pages. By default, it waits up to 5 minutes (300 seconds) for the site to respond. You can change that timeout if you want it to fail faster or give the site more time. It can also optionally look for a specific version name in your website's HTML if you need to verify that a particular version is deployed. You'd use this if you're running a live website and want to get notified automatically when it goes down. For example, a startup might set this to run every 15 minutes on their main landing page, so their team gets alerted instantly if there's an outage. Or after deploying a new version, you could run this check as part of your deployment process to make sure the site actually came back up after the update. The README doesn't go into detail about how it integrates with broader monitoring or notification systems, so it appears to be a building block you'd combine with GitHub's existing alerting features rather than a complete uptime monitoring solution on its own.