Captcha Index is the decentralized verification protocol protecting Web3 from bots, sybils, and automated attacks. Verify once, access everywhere.
One-time verification creates a persistent proof-of-humanity that works across all integrated protocols.
Pass a cryptographic challenge that proves human cognition without collecting personal data.
Receive a non-transferable verification NFT that serves as your proof-of-humanity credential.
Use your verification across all integrated protocols—airdrops, governance, DeFi, and more.
Integrate Captcha Index to eliminate bots, prevent sybil attacks, and ensure fair distribution.
Advanced behavioral analysis and cryptographic challenges detect and block automated scripts with 98.7% accuracy.
Prevent multi-account farming and ensure one person = one vote in governance and fair launches.
Distribute tokens exclusively to verified humans, eliminating bot farms and ensuring community rewards.
Zero-knowledge proofs verify humanity without exposing identity. No KYC, no personal data collection.
Join 450+ protocols using Captcha Index to protect their communities and ensure fair participation.