FengkongCloud

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CapMonster Cloud MCP

CapMonster Cloud MCP can also be used to detect and solve CAPTCHA

Learn more about MCP.

FengkongCloud is a captcha solution that protects websites from automated actions. It analyzes user behavior and generates a token that confirms legitimate activity.

Request parameters

type<string>required

CustomTask

---

class<string>required

fengkongcloud

---

websiteURL<string>required

The address of the main page where the captcha is located.

---

websiteKey<string>required

The value of the siteKey parameter found on the page.

---

apiJsUrl (inside metadata)<string>optional

Link to smcp.min.js. Example: https://castatic.fengkongcloud.com/pr/vX.X.X/smcp.min.js

---

userAgent<string>optional

Browser User-Agent. Use the current value supported by CapMonster Cloud: userAgentPlaceholder

You can get the latest value at: https://capmonster.cloud/api/useragent/actual.

Create task method

POST

https://api.capmonster.cloud/createTask

Request example

{
  "clientKey": "API_KEY",
  "task": {
    "type": "CustomTask",
    "class": "fengkongcloud",
    "websiteURL": "https://www.example.com/",
    "websiteKey": "your-website-key",
    "userAgent": "userAgentPlaceholder",
    "metadata": {
      "apiJsUrl": "https://castatic.fengkongcloud.com/pr/vX.X.X/smcp.min.js"
    }
  }
}

Response example

{
  "errorId": 0,
  "taskId": 407533072
}

Get task result method

Use the method getTaskResult to obtain the FengkongCloud solution.

POST

https://api.capmonster.cloud/getTaskResult

Request example

{
  "clientKey":"API_KEY",
  "taskId": 407533072
}

Response example

{
  "errorId": 0,
  "cost": 0.0006,
  "status": "ready",
  "solution": {
    "data": {
      "token": "abc123def456.....78"
    }
  }
}

How to find the websiteKey

1. Open the page with FengkongCloud captcha.
2. Open Developer Tools (F12 or right-click → Inspect).
3. Go to the Network tab and reload the page.
4. Look for a request to a URL containing /conf with parameters like appid or organization.
5. The appid parameter value is the websiteKey.

Alternatively, search the page source code for appid or look for scripts loading from fengkongcloud.com domains.

How to find the apiJsUrl

1. In Developer Tools, go to the Network tab.
2. Filter requests to find the script loading from castatic.fengkongcloud.com.
3. Look for a file named smcp.min.js and copy its full URL.