Self-hosted/open source stuff also available: - https://github.com/dgtlmoon/changedetection.io - https://github.com/paschmann/changd. Source: over 1 year 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 / 26 days ago

I use https://uptimerobot.com/ They have a call option and a bunch of others. - Source: Hacker News / about 1 month 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 / 8 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 / 9 months ago

Https://uptimerobot.com/ This will ping the ip’s the site and notify you if one goes down and it free for 50 sites. Source: about 1 year ago