Cloudflare went down yesterday. My monitoring lied. So I built this.

Yibnum — Wed, 19 Nov 2025 21:44:34 +0000

Yesterday’s Cloudflare outage wasted a few hours of my time — not because the outage was confusing, but because my monitoring stack gave me zero context about what was actually failing.

Everything lit up red. Every alert fired.
But nothing told me whether the problem was:

my origin

Cloudflare’s edge

DNS

SSL

routing

My servers were completely fine the whole time.

The real issue ended up being Cloudflare’s Bot Management system (a feature file doubled in size and tripped them up).

The bigger discovery:
most monitoring tools cannot tell the difference between an origin outage and a CDN/edge outage.

So I built a simple tool today to diagnose exactly that:

👉 https://stayup.dev

Paste a URL and it checks:

origin health

Cloudflare/Vercel/AWS edge

DNS

SSL expiry

CDN failure patterns

I built this out of frustration, but if you’re interested I’d love to hear how your monitoring handled the outage yesterday.

DEV Community: Yibnum

Cloudflare went down yesterday. My monitoring lied. So I built this.