Today I found linkchecker - available as a unix command-line program (although it also has a GUI or a web interface). - Source: dev.to / almost 2 years ago

In the past, I hosted everything on DigitalOcean (DO) with a modest server configuration that was stable enough for the current user load. Occasionally, I would encounter a minor DDoS attack that would bring the server down. Initially, DO would issue warnings that the server was using more than 70% or even 90% of the CPU without knowing the cause. The UptimeRobot tool would send alerts that my website was... - Source: dev.to / 2 days ago

I use Uptime Robot for this: https://uptimerobot.com/ I just configure it to access some endpoint on the API server. It checks it every minute and if it fails (non 200) it pings me. You can also set it up in more complex ways but this is easy. - Source: Hacker News / about 2 months ago

I use https://uptimerobot.com/ They have a call option and a bunch of others. - Source: Hacker News / 2 months ago

Ultimately, a web page is necessary to display the status of various systems. In the event of an unavailable system, the status page serves as a crucial platform for communicating the incident's progression. Multiple products cater to this need, with Atlassian's Status Pagebeing one notable example. Additionally, tools like Uptime Robot and Status Cake offer a comprehensive solution by integrating both the Page... - Source: dev.to / 9 months ago

For a quick check https://onlineornot.com/website-down-checker?url=https://designmodo.com but you probably want a tool that emails you when the website is down. Look for "Website monitoring", there's dozens of services and most have a free tier. https://uptimerobot.com/ https://www.statuscake.com/. - Source: Hacker News / 11 months ago