A while ago one of my production systems went down quietly. No crash logs, no alert, nothing dramatic — a cronjob just stopped firing and an endpoint started failing checks that nobody was running. I only found out when a customer emailed asking why things looked broken. By then it had been down for hours. That’s the moment “it’s probably fine” stops being an acceptable monitoring strategy, and the moment I decided to build the tool I actually wanted instead of settling for a half-fit off-the-shelf dashboard.

That tool is Checkmeup, and it’s now running in production, watching my own projects. This post is both the origin story and a full walkthrough of what it does.