Biometric CAPTCHA that verifies humans by how they write, not what they click. Combined with device fingerprinting and network intelligence.
100 free verifications. No credit card required.
One script tag on your page. Loads the biometric CAPTCHA widget and device fingerprinter.
Users handwrite a few characters. Their biometric patterns are analyzed in real-time using ML.
One API call to verify the token. Get human/bot classification plus a confidence score.
Handwriting dynamics, stroke timing, pressure patterns. ML models trained on real human behavior distinguish genuine users from bots with 99%+ accuracy.
Canvas, WebGL, audio context, fonts, and 50+ signals combined into a stable device identifier. Recognizes returning users across sessions without cookies.
IP reputation, TLS fingerprinting (JA4), proxy/VPN detection, and datacenter IP identification. Catch bots that spoof everything else.
Start free. Buy credits when you need them.
$0
100 verifications included
$80
10,000 verifications
$500
100,000 verifications
<!-- 1. Add the script -->
<script src="https://bio.argus.pw/argus-bio.js"></script>
<!-- 2. Create session (server-side) -->
const session = await fetch('https://api-bio.argus.pw/v1/session', {
method: 'POST',
headers: { 'X-API-Key': 'YOUR_KEY' },
body: JSON.stringify({ returnUrl: 'https://yoursite.com/cb' })
});
<!-- 3. Verify token (server-side) -->
const result = await fetch('https://api-bio.argus.pw/v1/verify', {
method: 'POST',
headers: { 'X-API-Key': 'YOUR_KEY' },
body: JSON.stringify({ token: tokenFromCallback })
});
// { verified: true, classification: 'human' }