KeyCAPTCHA

KeyCAPTCHA is a puzzle-based CAPTCHA that requires the user to assemble an image from scattered pieces. Unlike traditional text-based CAPTCHAs, it relies on spatial recognition to verify human interaction. The uCaptcha API solves KeyCAPTCHA challenges and returns a verification token, with or without a proxy.

Supported Types

Type	Proxy	Description
KeyCaptchaTokenProxyLess	No	Solve without proxy (recommended)
KeyCaptchaToken	Yes	Solve using your proxy

Parameters

Parameter	Type	Required	Description
type	string	Yes	Task type from the table above
websiteURL	string	Yes	URL of the page with the KeyCAPTCHA challenge
websiteKey	string	Yes	KeyCAPTCHA site key

Proxy Parameters

Required when using the KeyCaptchaToken task type.

Parameter	Type	Required	Description
proxyType	string	Yes	http, socks4, or socks5
proxyAddress	string	Yes	Proxy IP or hostname
proxyPort	integer	Yes	Proxy port
proxyLogin	string	No	Proxy username
proxyPassword	string	No	Proxy password

Create Task

Request

{
  "clientKey": "YOUR_API_KEY",
  "task": {
    "type": "KeyCaptchaTokenProxyLess",
    "websiteURL": "https://example.com/register",
    "websiteKey": "a86d9a6b-2d8b-11e0-a23a-1c6f65d10e96"
  }
}

Response

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

Solution Object

{
  "token": "d190f355|1|0f8|ef23...a512|1638438295"
}

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

How to Use

Once you receive the token value from the solution:

1. Form submission — Set the token in the hidden capcode input field and submit the form.
2. JavaScript injection — If the site handles verification through JavaScript, pass the token to the appropriate callback function.

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": "KeyCaptchaTokenProxyLess",
        "websiteURL": "https://example.com/register",
        "websiteKey": "a86d9a6b-2d8b-11e0-a23a-1c6f65d10e96"
    }
})
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: "KeyCaptchaTokenProxyLess",
      websiteURL: "https://example.com/register",
      websiteKey: "a86d9a6b-2d8b-11e0-a23a-1c6f65d10e96"
    }
  })
}).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": "KeyCaptchaTokenProxyLess",
      "websiteURL": "https://example.com/register",
      "websiteKey": "a86d9a6b-2d8b-11e0-a23a-1c6f65d10e96"
    }
  }'

# 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