Cap.js

Solve Cap.js — lightweight open-source PoW captcha

Price: $0.15 / 1k solves · Speed: ~0.5s

Cap.js is a minimal open-source proof-of-work captcha. Very fast to solve.

Finding the API endpoint

Look in the page HTML for the Cap widget:

<cap-widget data-cap-api-endpoint="https://example.com/api/captcha/"></cap-widget>

The data-cap-api-endpoint attribute is the value you need. It's the URL of the Cap.js server — the solver will call /challenge and /redeem on it automatically.

Request

{
  "type": "CapProxyless",
  "api_endpoint": "https://example.com/api/captcha/"
}

With proxy:

{
  "type": "CapTask",
  "api_endpoint": "https://example.com/api/captcha/",
  "proxy": "http://user:pass@host:port"
}

Response

{
  "success": true,
  "token": "cap_token_...",
  "took_ms": 480,
  "cost": 0.00015
}

cURL example

curl -s -X POST https://api.solver.lol/solve \
  -H "X-API-Key: sk_your_key_here" \
  -H "Content-Type: application/json" \
  -d '{
    "type": "CapProxyless",
    "api_endpoint": "https://example.com/api/captcha/"
  }'

Parameters

Field	Required	Description
`type`	✓	`CapProxyless` or `CapTask`
`api_endpoint`	✓	The Cap.js server URL (from `data-cap-api-endpoint`)
`proxy`	—	`http://user:pass@host:port` (Task types only)