upsonar.io – monitors external resources to detect CDN outages

Summary: upsonar.io checks all external resources on your website, such as CDNs, scripts, fonts, and widgets, to detect failures that traditional uptime monitors miss. It parses your page and verifies these dependencies are loading correctly, preventing silent site breakages during CDN outages.

What it does

It parses your website and verifies that all external resources are loading properly, beyond just checking server responsiveness.

Who it's for

Websites relying on multiple external resources like CDNs and third-party scripts that need comprehensive uptime monitoring.

Why it matters

It identifies issues caused by external resource failures that traditional server-only monitors overlook, preventing unnoticed site breakages.