Sentinel Outside View
See what the internet already sees.
Enter a domain to see the public signals it exposes right now — TLS certificate, DNS and registration, email authentication, and security headers. No account needed for the summary.
Passive observation of publicly available information only — the same reads any browser makes. No intrusive testing. Scans are rate-limited and logged.
What this is: a point-in-time observation of information your domain already publishes to every visitor — summarized in neutral language, with sensitive detail withheld until ownership is verified.
What this is not: a security audit, a vulnerability assessment, a statement of compromise or negligence, or a compliance determination.
Own this domain? To dispute an observation or request suppression of unclaimed results, email security@9keys.io. Suppression is honoured pending review — target response within five business days.