Your Uptime Monitor Says Green. Your Users Disagree.

Your uptime monitor pings your homepage every 60 seconds and gets a 200 back. Green. Healthy. No alerts. Meanwhile, your checkout is broken because a payment webhook stopped processing three hours ago. Your welcome emails are queued and going nowhere. Your nightly sync hasn't run since Tuesday. This is the gap nobody talks about: uptime monitoring tells you your server is alive. It does not tell you your app is working. What an uptime check actually does A traditional uptime check sends an HTTP request to a URL and waits for a response. If it gets one, the monitor turns green. That's it. It doesn't know whether your database is accepting writes. It doesn't know whether your background workers are running. It doesn't know whether the queue has 40,000 unprocessed jobs backed up behind a dead consumer. A server can respond with 200 OK while being completely broken in every way that matters to your users. The failure modes your ping check misses Background workers dying quietly Most apps h