What does PerimeterX (HUMAN) actually check?

PerimeterX collects ~30 client-side signals — canvas, WebGL, audio, hardware concurrency, mouse entropy — and emits a sensor blob. The gateway validates the blob server-side and issues a _px3 cookie when satisfied. CaptchaSonic replays the sensor flow and returns the cookie.

Does the solver handle the PerimeterX captcha fallback?

Yes. When PerimeterX escalates to a visible captcha (typically a press-and-hold or image-match variant), the same task endpoint solves it and returns a unified token.

How long does a _px3 token stay valid?

Usually around 1 hour per origin and fingerprint. Cache the cookie across requests within that window so each call doesn't re-pay the solve.

HUMAN sensor solver

PerimeterX Bypass

Bypass PerimeterX (HUMAN) bot-detection with CaptchaSonic. AI solver returns the validated _px3 cookie + token so headless clients survive HUMAN's sensor-based fingerprinting.

Start Building Read Documentation

// CaptchaSonic — PerimeterX (HUMAN) solver
const sonic = new CaptchaSonic('YOUR_API_KEY');

const result = await sonic.solve({
  type: 'PerimeterXTask',
  websiteURL: 'https://target.example.com/protected',
  userAgent: 'Mozilla/5.0 (...)',
  proxy: { type: 'http', host: '...', port: 8080 }
});

// Set _px3 cookie on subsequent requests.
document.cookie = '_px3=' + result.token;

Why use Sonic for HUMAN sensor solver?

Built for speed, reliability, and easy integration.

Sensor blob replay

Solves the sensor-blob signal flow so the gateway issues a valid _px3 cookie.

Captcha fallback covered

When PerimeterX escalates to a visible captcha, the same task handles it.

Proxy IP fingerprinting

Solve from inside your egress IP so the cookie survives HUMAN's rate-limit signals.

Built for Developers

Choose your language and start solving CAPTCHAs in seconds

Type-safe

Async/Await

Error Handling

View Full Documentation

index.js

import { CaptchaSonic } from 'captchasonic'

const client = new CaptchaSonic({
  apiKey: 'your_api_key'
})

// Solve reCAPTCHA
const result = await client.solve({
  type: 'recaptcha_v2',
  sitekey: 'site_key_here',
  pageurl: 'https://example.com'
})

console.log(result.solution)

99.9%

Success Rate

<0.5s

Avg Response

99.9%

Uptime

10k+

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