Blog
Verification
Reverse DNS lookup: how bot verification actually works
Reverse DNS lookup maps an IP to a hostname, but verifying a crawler needs forward-confirmed reverse DNS. Here is how FCrDNS proves a bot is real.
How to verify Googlebot (and catch spoofed bots)
A user-agent string is not proof. Learn the layered way to verify Googlebot with reverse DNS, published IP ranges, and Web Bot Auth signatures.
What is Web Bot Auth? A plain-English guide to signed bot traffic
Web Bot Auth is an emerging IETF method that lets bots and AI agents cryptographically sign their HTTP requests so sites can verify them. Here is how the handshake works and why it beats user-agent strings.
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