Cloudflare Task

Cloudflare: Solving JS Challenge

This task type is used to solve Cloudflare's JavaScript Challenge (the 'Checking your browser...' interstitial page). The solution provides a valid `cf_clearance` cookie.

1. Create Task

Use the `createTask` method to initiate the solving process. You must provide the `websiteURL` and a `proxy`.

Task Object Parameters

Property	Type	Required	Description
`type`	String	Yes	Must be `AntiCloudflareTask`
`websiteURL`	String	Yes	The full URL of the page protected by a Cloudflare JS Challenge.
`proxy`	String	Yes	Your proxy address in the format `http:login:password@ip:port`.

Example Request

POST https://api.captchasonic.com/createTask
Host: api.captchasonic.com
Content-Type: application/json

{
    "apiKey": "YOUR_API_KEY",
    "task": {
        "type": "AntiCloudflareTask",
        "websiteURL": "https://www.g2.com/products/discord/reviews",
        "proxy": "http:login:[email protected]:8888"
    }
}

Example Response

A successful creation request returns a taskId which you will use in the next step.

{
    "errorId": 0,
    "status": "idle",
    "taskId": "72183ab4-12ec-11ed-a9c8-0242ac110007"
}

2. Get Result

After creating a task, use the `getTaskResult` method to check the status and retrieve the solution. Poll this endpoint every 5-10 seconds until the status is `completed`.

Example Request

POST https://api.captchasonic.com/getTaskResult
Host: api.captchasonic.com
Content-Type: application/json

{
    "apiKey": "YOUR_API_KEY",
    "taskId": "72183ab4-12ec-11ed-a9c8-0242ac110007"
}

Example Success Response

When the task status becomes completed, the response will contain the solution object.

{
    "errorId": 0,
    "status": "completed",
    "solution": {
        "userAgent": "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/108.0.0.0 Safari/537.36",
        "cookies": {
            "cf_clearance": "AbCdEf...-0-1"
        }
    },
    "taskId": "72183ab4-12ec-11ed-a9c8-0242ac110007"
}

SDK Usage

Python

# Coming soon: A simplified Python SDK
# pip install --upgrade captchasonic
#
# from captchasonic import CaptchaSonic
#
# client = CaptchaSonic(api_key="YOUR_API_KEY")
#
# solution = client.solve_cloudflare(
#   website_url="https://www.g2.com/products/discord/reviews",
#   proxy="http:login:[email protected]:8888"
# )
# print(f"CF Clearance Cookie: {solution.cookies['cf_clearance']}")

import requests
import time

API_KEY = "YOUR_API_KEY"
API_URL = "https://api.captchasonic.com"

def solve_cloudflare():
    # 1. Create the task
    print("Creating Cloudflare task...")
    create_payload = {
        "apiKey": API_KEY,
        "task": {
            "type": "AntiCloudflareTask",
            "websiteURL": "https://www.g2.com/products/discord/reviews",
            "proxy": "http:login:[email protected]:8888"
        }
    }
    res = requests.post(f"{API_URL}/createTask", json=create_payload)
    if res.status_code != 200:
        print(f"Error creating task: {res.text}")
        return

    task_id = res.json().get("taskId")
    if not task_id:
        print(f"Could not find taskId in response: {res.json()}")
        return
    
    print(f"Task created successfully. Task ID: {task_id}")

    # 2. Poll for the result
    while True:
        print("Polling for result...")
        time.sleep(5) # Wait 5 seconds between polls
        get_payload = {"apiKey": API_KEY, "taskId": task_id}
        res = requests.post(f"{API_URL}/getTaskResult", json=get_payload)
        
        if res.status_code != 200:
            print(f"Error getting result: {res.text}")
            continue

        resp_json = res.json()
        status = resp_json.get("status")
        
        if status == "completed":
            print("Task completed!")
            return resp_json.get("solution")
        elif status == "failed":
            print(f"Task failed: {resp_json.get('errorDescription')}")
            return
        elif status == "processing":
            print("Task is still processing, trying again...")
        else:
            print(f"Unknown status: {status}, response: {resp_json}")
            
# Run the solver
solution = solve_cloudflare()
if solution:
    print("\n--- SOLUTION ---")
    print(f"User-Agent: {solution.get('userAgent')}")
    print(f"cf_clearance: {solution.get('cookies', {}).get('cf_clearance')}")
    print("----------------")

// Full Node.js example
async function solveCloudflare() {
    const API_KEY = "YOUR_API_KEY";
    const API_URL = "https://api.captchasonic.com";

    // 1. Create the task
    console.log("Creating Cloudflare task...");
    const createRes = await fetch(`${API_URL}/createTask`, {
        method: 'POST',
        headers: { 'Content-Type': 'application/json' },
        body: JSON.stringify({
            apiKey: API_KEY,
            task: {
                type: "AntiCloudflareTask",
                websiteURL: "https://www.g2.com/products/discord/reviews",
                proxy: "http:login:[email protected]:8888"
            }
        })
    });
    const { taskId, errorId } = await createRes.json();
    if (errorId !== 0 || !taskId) {
        console.error("Error creating task:", await createRes.text());
        return;
    }
    console.log(`Task created successfully. Task ID: ${taskId}`);

    // 2. Poll for the result
    while (true) {
        console.log("Polling for result...");
        await new Promise(resolve => setTimeout(resolve, 5000)); // Wait 5s

        const getRes = await fetch(`${API_URL}/getTaskResult`, {
            method: 'POST',
            headers: { 'Content-Type': 'application/json' },
            body: JSON.stringify({ apiKey: API_KEY, taskId })
        });
        const result = await getRes.json();
        
        if (result.status === "completed") {
            console.log("Task completed!");
            return result.solution;
        }
        if (result.status === "failed") {
            console.error(`Task failed: ${result.errorDescription}`);
            return;
        }
    }
}

solveCloudflare().then(solution => {
    if (solution) {
        console.log("\n--- SOLUTION ---");
        console.log(`User-Agent: ${solution.userAgent}`);
        console.log(`cf_clearance: ${solution.cookies?.cf_clearance}`);
        console.log("----------------");
    }
});