HATCHA: A reverse CAPTCHA that blocks humans and lets AI agents pass
By
backlit4034
Summary
HATCHA is a reverse CAPTCHA system developed by monday.com that gates access behind challenges trivial for AI agents but difficult for humans — such as large-number multiplication, string reversal, and binary decoding. Unlike traditional CAPTCHAs that prove you're human, HATCHA proves you're not human by allowing AI agents to pass while blocking humans. It provides a Next.js quickstart guide and uses stateless verification with signed tokens containing hashed answers and expiry dates.
Source
Hacker NewsHATCHA: A reverse CAPTCHA that blocks humans and lets AI agents passgithub.comKey quotes
· 3 pulledCAPTCHA proves you're human. HATCHA proves you're not.
HATCHA (Hyperfast Agent Test for Computational Heuristic Assessment) is a reverse CAPTCHA that gates access behind challenges trivial for AI agents but painful for humans
The answer never reaches the client. The signed token is opaque and contains only a hashed answer + expiry. Verification is stateless — no dat
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