CaptchaFox

CaptchaFox is a privacy-first CAPTCHA solution designed as a GDPR-compliant alternative to services like reCAPTCHA. It uses risk-based analysis and invisible challenges to verify users with minimal friction. The uCaptcha API solves CaptchaFox challenges and returns a verification token.

Note

CaptchaFox uses a single task type. There is no separate proxy variant — proxy handling is managed internally.

Supported Types

Type	Proxy	Description
CaptchaFoxToken	No	Solve CaptchaFox challenges

Parameters

Parameter	Type	Required	Description
type	string	Yes	Must be CaptchaFoxToken
websiteURL	string	Yes	URL of the page with the CaptchaFox widget
websiteKey	string	Yes	CaptchaFox site key

Create Task

Request

{
  "clientKey": "YOUR_API_KEY",
  "task": {
    "type": "CaptchaFoxToken",
    "websiteURL": "https://example.com/contact",
    "websiteKey": "sk_11223344556677889900aabbcc"
  }
}

Response

{
  "errorId": 0,
  "taskId": "abc-123-def"
}

Solution Object

{
  "token": "CAPTCHAFOX_1a2b3c4d5e6f...verification_token"
}

Field	Type	Description
token	string	The CaptchaFox verification token to submit with the form

How to Use

Once you receive the token value from the solution:

1. Form submission — Set the CaptchaFox token in the hidden verification input field and submit the form.
2. Server-side validation — Pass the token to the target site’s backend, which will verify it against the CaptchaFox API.

Code Examples

Python

import requests
import time

API_KEY = "YOUR_API_KEY"

# Create task
response = requests.post("https://api.ucaptcha.net/createTask", json={
    "clientKey": API_KEY,
    "task": {
        "type": "CaptchaFoxToken",
        "websiteURL": "https://example.com/contact",
        "websiteKey": "sk_11223344556677889900aabbcc"
    }
})
task_id = response.json()["taskId"]

# Poll for result
while True:
    result = requests.post("https://api.ucaptcha.net/getTaskResult", json={
        "clientKey": API_KEY,
        "taskId": task_id
    }).json()

    if result["status"] == "ready":
        token = result["solution"]["token"]
        print("Token:", token)
        break
    elif result["status"] == "failed":
        print("Error:", result.get("errorDescription"))
        break

    time.sleep(5)

JavaScript

const API_KEY = "YOUR_API_KEY";

const { taskId } = await fetch("https://api.ucaptcha.net/createTask", {
  method: "POST",
  headers: { "Content-Type": "application/json" },
  body: JSON.stringify({
    clientKey: API_KEY,
    task: {
      type: "CaptchaFoxToken",
      websiteURL: "https://example.com/contact",
      websiteKey: "sk_11223344556677889900aabbcc"
    }
  })
}).then(r => r.json());

while (true) {
  const result = await fetch("https://api.ucaptcha.net/getTaskResult", {
    method: "POST",
    headers: { "Content-Type": "application/json" },
    body: JSON.stringify({ clientKey: API_KEY, taskId })
  }).then(r => r.json());

  if (result.status === "ready") {
    console.log("Token:", result.solution.token);
    break;
  } else if (result.status === "failed") {
    console.error("Error:", result.errorDescription);
    break;
  }

  await new Promise(r => setTimeout(r, 5000));
}

cURL

# Create task
curl -X POST https://api.ucaptcha.net/createTask \
  -H "Content-Type: application/json" \
  -d '{
    "clientKey": "YOUR_API_KEY",
    "task": {
      "type": "CaptchaFoxToken",
      "websiteURL": "https://example.com/contact",
      "websiteKey": "sk_11223344556677889900aabbcc"
    }
  }'

# Poll for result (replace TASK_ID with the taskId from above)
curl -X POST https://api.ucaptcha.net/getTaskResult \
  -H "Content-Type: application/json" \
  -d '{
    "clientKey": "YOUR_API_KEY",
    "taskId": "TASK_ID"
  }'

Provider Coverage

• 2Captcha
• RiskByPass
• Multibot