SupercheckBot

SupercheckBot makes the requests behind the Supercheck free tools. It runs only when a person types your address into a tool and passes a bot check. It never crawls and never follows links.

How to recognise it

• User agent: SupercheckBot/1.0 (+https://supercheck.io/tools/bot)
• Requests come from Cloudflare Workers, so Cloudflare adds a CF-Worker header naming our workers.dev zone.
• Only GET and HEAD, on ports 80 and 443, with no cookies, body or credentials.

What it requests

• One page and up to 5 redirects for the uptime and security headers tools.
• The home page, /llms.txt, /robots.txt and a few /.well-known/ files for the agent readiness tool.
• The page head and one HEAD request for its og:image for the social preview tool.
• The DNS lookup and domain expiry tools never contact your server.

Each site gets at most about 10 checks a minute from each Cloudflare location, and results may be cached for 10 minutes.

Opt out

Email [email protected] with the subject "SupercheckBot opt-out" and your domain, and we add it to our block list, usually within a day. You can also block the user agent or the CF-Worker header at your firewall.