MTCaptcha

MTCaptcha is an enterprise CAPTCHA service that offers adaptive challenges including invisible verification, slider puzzles, and visual challenges. It is used by government agencies, financial institutions, and enterprise websites, particularly in regulated industries. Upon solving, MTCaptcha produces a verified token that is submitted with form data for server-side validation.

Supported Types

Type	Proxy Required	Description
MTCaptchaToken	Yes	Solves the challenge using your proxy. Use when the target site validates the solver’s IP.
MTCaptchaTokenProxyLess	No	Solves the challenge without a proxy. Recommended for most use cases.

Parameters

Parameter	Type	Required	Description
type	string	Yes	MTCaptchaToken or MTCaptchaTokenProxyLess
websiteURL	string	Yes	The URL of the page containing the MTCaptcha widget
websiteKey	string	Yes	The site key found in the MTCaptcha configuration. Look for the sitekey parameter in the MTCaptcha script initialization.

Proxy Parameters

Required when using the MTCaptchaToken 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": "MTCaptchaTokenProxyLess",
    "websiteURL": "https://example.com/login",
    "websiteKey": "MTPublic-KzqLY11k5"
  }
}

With proxy:

{
  "clientKey": "YOUR_API_KEY",
  "task": {
    "type": "MTCaptchaToken",
    "websiteURL": "https://example.com/login",
    "websiteKey": "MTPublic-KzqLY11k5",
    "proxyType": "http",
    "proxyAddress": "1.2.3.4",
    "proxyPort": 8080,
    "proxyLogin": "user",
    "proxyPassword": "pass"
  }
}

Response

{
  "errorId": 0,
  "taskId": "550e8400-e29b-41d4-a716-446655440000",
  "status": "processing"
}

Solution Object

{
  "token": "v1(03,79a,0,0,MTPublic-KzqLY11k5,c0b8...)"
}

Field	Type	Description
token	string	The verified token to submit with the form

How to Use

1. Find the MTCaptcha site key in the page source. It is typically in a script block like mtcaptchaConfig = { sitekey: "MTPublic-..." } or in a data-sitekey attribute.
2. Submit the task and poll for the solution.
3. Set the returned token as the value of the mtcaptcha-verifiedtoken hidden input field in the form.
4. Submit the form. The server will verify the token against the MTCaptcha API.

Tip

The mtcaptcha-verifiedtoken field is automatically created by the MTCaptcha JavaScript widget. When bypassing the widget, you need to include this field manually in your form submission.

Code Examples

Python

import requests
import time

API_KEY = "YOUR_API_KEY"

response = requests.post("https://api.ucaptcha.net/createTask", json={
    "clientKey": API_KEY,
    "task": {
        "type": "MTCaptchaTokenProxyLess",
        "websiteURL": "https://example.com/login",
        "websiteKey": "MTPublic-KzqLY11k5"
    }
})
task_id = response.json()["taskId"]

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("Solution:", token)

        # Submit the form with the verified token
        form_data = {
            "mtcaptcha-verifiedtoken": token,
            "username": "user",
            "password": "pass"
        }
        response = requests.post("https://example.com/login", data=form_data)
        print("Status:", response.status_code)
        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: "MTCaptchaTokenProxyLess",
      websiteURL: "https://example.com/login",
      websiteKey: "MTPublic-KzqLY11k5"
    }
  })
}).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("Solution:", result.solution.token);
    break;
  } else if (result.status === "failed") {
    console.error("Error:", result.errorDescription);
    break;
  }
  await new Promise(r => setTimeout(r, 5000));
}

cURL

# Create the task
curl -X POST https://api.ucaptcha.net/createTask \
  -H "Content-Type: application/json" \
  -d '{
    "clientKey": "YOUR_API_KEY",
    "task": {
      "type": "MTCaptchaTokenProxyLess",
      "websiteURL": "https://example.com/login",
      "websiteKey": "MTPublic-KzqLY11k5"
    }
  }'

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

Provider Coverage

• 2Captcha
• CapSolver

Aliases

No backward-compatible aliases. Use MTCaptchaToken or MTCaptchaTokenProxyLess directly.