How the probe works

Outbound requests useEdgeAudit/1.0 (+https://this-host/about). We resolve A/AAAA over DoH, block private and link-local addresses, then issue a single HTTPS GET with an 8 second timeout and a 2 MiB HTML cap.

TTFB is measured from this Worker to your origin. It is not a visitor’s Core Web Vital. HTML is streamed through HTMLRewriter; we never store the page body.