Terms of use

Version 2026-10-22. Draft, pending review.

1. Self-assessment only. You may only check domains you own or are authorized to manage. By starting verification you confirm this, and we log that consent with a timestamp.
2. Checks run only after you prove control of the domain by DNS TXT record or a file on the site. Verification lasts 30 days, for your browser only.
3. No bulk use, automation, or attempts to check domains you don't control.
4. Results are estimates from publicly announced headers. "Likely patched" is not a guarantee of safety. Confirm with your host.
5. The service never runs exploits or attack traffic. It's provided as is, free, with no warranty, and is not legal or security advice.
6. We may rate-limit or block use that looks abusive.