Captcha Bot

How to Set Up Proxies for CAPTCHA Solving

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Bob Leixa
·

5 min read

CAPTCHAs are an essential security feature on many websites, designed to distinguish between humans and bots. However, for developers and data-scraping enthusiasts, these challenges can become a major roadblock. In this blog, we'll explore how to use proxies to bypass CAPTCHA challenges efficiently, with a focus on integrating tools like CapSolver and referring to its comprehensive documentation on reCAPTCHA v2.

Why Use Proxies for CAPTCHA Solving?

When performing automated tasks or scraping data, your IP address can quickly become flagged by CAPTCHA systems. Proxies help by:

  • Rotating IPs: Changing your IP address with every request or at defined intervals prevents any single IP from making too many requests.

  • Avoiding Rate Limits: By distributing your requests over multiple IPs, you reduce the chance of triggering rate limiting or anti-bot measures.

  • Geo-Targeting: Some websites restrict content based on location. Proxies let you choose IPs from specific regions to access geo-restricted data.

  • Enhanced Anonymity: With a diverse proxy pool (including residential, datacenter, and mobile proxies), your automated requests mimic those of real users more convincingly.

Using high-quality proxies—whether they are residential proxies, datacenter proxies, or SOCKS5 proxies—ensures that your scraping or automation activity remains under the radar.

Setting Up Your Proxies with CapSolver

CapSolver allows you to solve various CAPTCHA challenges (including reCAPTCHA v2, v3, and Enterprise versions) using your own proxies. This ensures that the IP used to load the page matches the one used to solve the CAPTCHA, leading to higher success rates.

Step 1: Create a Task Using the CapSolver API

Below is a sample Python script that demonstrates how to create a task to solve a reCAPTCHA v2 challenge using a proxyless approach (you can also integrate your own proxies by adding the appropriate parameters):

import requests
import time

api_key = "YOUR_API_KEY"
site_key = "6Le-wvkSAAAAAPBMRTvw0Q4Muexq9bi0DJwx_mJ-"
site_url = "https://www.google.com/recaptcha/api2/demo"

def solve_recaptcha():
    payload = {
        "clientKey": api_key,
        "task": {
            "type": "ReCaptchaV2TaskProxyLess",
            "websiteKey": site_key,
            "websiteURL": site_url
        }
    }
    res = requests.post("https://api.capsolver.com/createTask", json=payload)
    resp = res.json()
    task_id = resp.get("taskId")
    if not task_id:
        print("Failed to create task:", res.text)
        return
    print(f"Got taskId: {task_id}. Waiting for result...")
    while True:
        time.sleep(3)
        payload = {"clientKey": api_key, "taskId": task_id}
        res = requests.post("https://api.capsolver.com/getTaskResult", json=payload)
        resp = res.json()
        if resp.get("status") == "ready":
            return resp.get("solution", {}).get("gRecaptchaResponse")
        if resp.get("status") == "failed" or resp.get("errorId"):
            print("Solve failed! Response:", res.text)
            return

token = solve_recaptcha()
print("CAPTCHA solution token:", token)

Step 2: Integrate Your Proxies

To further enhance your CAPTCHA solving success rate—especially with challenging or high-security sites—you can integrate your own proxies into the CapSolver task. CapSolver supports multiple proxy types including SOCKS4, SOCKS5, HTTP, and HTTPS. There are two main ways to provide proxy details:

Format 1: Separate Proxy Parameters

Provide proxy details using individual parameters such as:

  • proxyType: Specifies the proxy protocol (e.g., http, https, socks5).

  • proxyAddress: The IP address or hostname of your proxy.

  • proxyPort: The port number.

  • proxyLogin and proxyPassword: Your authentication credentials, if required.

Example:


{
    "clientKey": api_key,
    "task": {
        "type": "ReCaptchaV2Task",
        "websiteKey": site_key,
        "websiteURL": site_url,
        "proxyType": "https",
        "proxyAddress": "198.199.100.10",
        "proxyPort": 3949,
        "proxyLogin": "user",
        "proxyPassword": "pass"
    }
}

Format 2: Concatenated Proxy String

Alternatively, you can provide all proxy parameters in one concatenated string:

  • Examples:

    • "socks5:192.191.100.10:4780:user:pwd"

    • "http:192.191.100.10:4780:user:pwd"

    • If using an IP authentication proxy (no username and password needed), simply "198.199.100.10:4780"

payload = {
    "clientKey": api_key,
    "task": {
        "type": "ReCaptchaV2Task",
        "websiteKey": site_key,
        "websiteURL": site_url,
        "proxy": "https://user:pass@198.199.100.10:3949"
    }
}

Important: If you are using an IP address authentication proxy, make sure to whitelist the following CapSolver IP addresses:

  • 47.253.53.46

  • 47.253.81.245

Including these details ensures that your proxy is recognized by CapSolver and that your CAPTCHA-solving task functions properly.

Additional Proxy Terminology

When discussing proxies, you might come across terms such as:

  • Residential Proxies: IPs assigned by Internet Service Providers (ISPs) to real residential addresses; these are generally more trusted.

  • Datacenter Proxies: IP addresses provided by data centers; often faster but more easily flagged.

  • Mobile Proxies: IP addresses from mobile networks that offer high anonymity.

  • Rotating Proxies: Proxies that change your IP address on a per-request basis, reducing the risk of detection.

  • Proxy Pools: Collections of proxies that you can cycle through automatically, ensuring a diverse set of IPs.

These concepts are critical in designing a robust CAPTCHA bypass strategy because the quality and type of proxy directly impact your ability to evade CAPTCHA challenges.

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Supporting Other Task Types with Proxies

CapSolver is designed to work with a wide array of CAPTCHA types and supports numerous task types that incorporate proxy usage. If your application requires solving different types of CAPTCHA challenges beyond reCAPTCHA v2

For a complete list of supported CAPTCHA task types and detailed proxy configurations, please refer to the following documentation pages:

and more can be found in docs, so by choosing the task type that best suits your needs, you can tailor your proxy configuration for optimal results in solving even the most complex CAPTCHA challenges.

Real-World Applications

Integrating proxies with CAPTCHA solving services is essential for many use cases:

  • Web Scraping: Distribute requests across multiple IP addresses to avoid rate limiting.

  • Automation: Ensure smooth, uninterrupted access to websites that use CAPTCHA for security.

  • Data Collection: Access geo-restricted content by selecting proxies from specific regions.

Conclusion

Setting up proxies for CAPTCHA solving can dramatically improve your success rate when dealing with automated challenges. Whether you choose to use a service like CapSolver directly or integrate it with your own proxy setup, the key is to ensure that the IP used for solving matches the one loading the page. This alignment reduces detection and helps maintain a human-like browsing experience.

By following the steps outlined above and using the sample code provided—with added proxy configurations—you can build a reliable CAPTCHA solving workflow that scales with your needs. For more detailed documentation and advanced configuration options, visit the CapSolver API – How to Use Proxy Guide.

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