reCAPTCHA V2 Callback demo

How to solve reCAPTCHA V2 Callback

1. Open developer's console in your browser and find element with data-sitekey attribute.

   <div class="g-recaptcha" data-sitekey="6LfD3PIbAAAAAJs_eEHvoOl75_83eXSqpPSRFJ_u" id="recaptcha"></div>Copy code snippet

2. Send sitekey and pageurl to our API.

   With SDK (recommended):

   PHP

   // https://github.com/2captcha/2captcha-php
   
   require(__DIR__ . '/../src/autoloader.php');
   
   $solver = new \TwoCaptcha\TwoCaptcha('YOUR_API_KEY');
   
   try {
       $result = $solver->recaptcha([
           'sitekey' => '6LfD3PIbAAAAAJs_eEHvoOl75_83eXSqpPSRFJ_u',
           'url'     => 'https://2captcha.com/demo/recaptcha-v2-callback',
       ]);
   } catch (\Exception $e) {
       die($e->getMessage());
   }
   
   die('Captcha solved: ' . $result->code);Copy code snippet

   Python

   # https://github.com/2captcha/2captcha-python
   
   import sys
   import os
   
   sys.path.append(os.path.dirname(os.path.dirname(os.path.realpath(__file__))))
   
   from twocaptcha import TwoCaptcha
   
   api_key = os.getenv('APIKEY_2CAPTCHA', 'YOUR_API_KEY')
   
   solver = TwoCaptcha(api_key)
   
   try:
       result = solver.recaptcha(
           sitekey='6LfD3PIbAAAAAJs_eEHvoOl75_83eXSqpPSRFJ_u',
           url='https://2captcha.com/demo/recaptcha-v2-callback')
   
   except Exception as e:
       sys.exit(e)
   
   else:
       sys.exit('solved: ' + str(result))Copy code snippet

   Java

   // https://github.com/2captcha/2captcha-java
   
   package examples;
   
   import com.twocaptcha.TwoCaptcha;
   import com.twocaptcha.captcha.reCAPTCHA;
   
   public class reCAPTCHAV2Example {
       public static void main(String[] args) {
           TwoCaptcha solver = new TwoCaptcha("YOUR_API_KEY");
           ReCaptcha captcha = new ReCaptcha();
           captcha.setSiteKey("6LfD3PIbAAAAAJs_eEHvoOl75_83eXSqpPSRFJ_u");
           captcha.setUrl("https://2captcha.com/demo/recaptcha-v2-callback");
           try {
               solver.solve(captcha);
               System.out.println("Captcha solved: " + captcha.getCode());
           } catch (Exception e) {
               System.out.println("Error occurred: " + e.getMessage());
           }
       }
   
   }Copy code snippet

   C#

   // https://github.com/2captcha/2captcha-csharp
   
   using System;
   using System.Linq;
   using TwoCaptcha.Captcha;
   
   namespace TwoCaptcha.Examples
   {
       public class reCAPTCHAV2Example
       {
           public void Main()
           {
               TwoCaptcha solver = new TwoCaptcha("YOUR_API_KEY");
               ReCaptcha captcha = new ReCaptcha();
               captcha.SetSiteKey("6LfD3PIbAAAAAJs_eEHvoOl75_83eXSqpPSRFJ_u");
               captcha.SetUrl("https://2captcha.com/demo/recaptcha-v2-callback");
               try
               {
                   solver.Solve(captcha).Wait();
                   Console.WriteLine("Captcha solved: " + captcha.Code);
               }
               catch (AggregateException e)
               {
                   Console.WriteLine("Error occurred: " + e.InnerExceptions.First().Message);
               }
           }
       }
   }Copy code snippet

   Go

   // https://github.com/2captcha/2captcha-go
   
   package main
   
   import (
       "fmt"
       "log"
       "github.com/2captcha/2captcha-go"
   )
   
   func main() {
       client := api2captcha.NewClient("API_KEY")  
       captcha := api2captcha.ReCaptcha{
           SiteKey: "6LfD3PIbAAAAAJs_eEHvoOl75_83eXSqpPSRFJ_u",
           Url: "https://2captcha.com/demo/recaptcha-v2-callback",
       }
       code, err := client.Solve(captcha.ToRequest())
       if err != nil {
           log.Fatal(err);
       }
       fmt.Println("code "+code)
   }Copy code snippet

   C++

   // https://github.com/2captcha/2captcha-cpp
   
   #include <cstdio>
   
   #include "curl_http.hpp"
   #include "api2captcha.hpp"
   
   int main (int ac, char ** av)
   {
   api2captcha::curl_http_t http;
   http.set_verbose (true);
   
   api2captcha::client_t client;
   client.set_http_client (&http);
   client.set_api_key (API_KEY);
   
   api2captcha::recaptcha_t cap;
   cap.set_site_key ("6LfD3PIbAAAAAJs_eEHvoOl75_83eXSqpPSRFJ_u");
   cap.set_url ("https://2captcha.com/demo/recaptcha-v2-callback");
   
   try
   {
       client.solve (cap);
       printf ("code '%s'\n", cap.code ().c_str ());
   }
   catch (std::exception & e)
   {
       fprintf (stderr, "Failed: %s\n", e.what ());
   }
   
   return 0;   
   }Copy code snippet

   Ruby

   # https://github.com/2captcha/2captcha-ruby
   require 'api_2captcha'
   
   client =  Api2Captcha.new("YOUR_API_KEY")
   
   result = client.recaptcha_v2({
     googlekey: '6Le-wvkSVVABCPBMRTvw0Q4Muexq1bi0DJwx_mJ-',
     pageurl: 'https://mysite.com/page/with/recaptcha_v2'
   })Copy code snippet

   Wait for the result, which may look like this:

   03AGdBq27lvCYmKkaqDdxWLfMe3ovADGfGlSyiR-fN_EJrZGniTAmdH1XSjK8ralsctfjOLX2K0T7dJfxPqqga8dtSG2Lmns8Gk2ckcU6PQzUFieBqrtpkr5PPwnngew0Rnot2ik1y8m202u6pHTIquExlEYSlzS8vfoyPPt8fCf-Zrbu8vWkiY8Ogj17ommHMgkguZbmEyOdfLTXzhRko-a655_jJdCMjEtMxva-b78DnGlXu9d0o6vEmrw9n8ABu4lLsWnIbYPH0beXRRIkUE3si64Xhwkh1aO3L1HaIR3sfR0vOs3GV1OBzry_tFsZM0ZhSQovKJwjLlotrYajyTSRv3hgvXtLlLxXzbAwgeI91-wM7AFEte0uO_DhcNajxZr7E50wU9vuAe_drGWe4q-hNx4PQPenjaw

   Manually:

   1. Send GET or POST request to our API URL: https://2captcha.com/in.php with method set to userrecaptcha and provide the value found on previous step as value for googlekey and full page URL as value for pageurl.
      Request example:
      GET https://2captcha.com/in.php?key=YOUR_API_KEY&method=userrecaptcha&googlekey=6LfD3PIbAAAAAJs_eEHvoOl75_83eXSqpPSRFJ_u&pageurl=http://2captcha.com/demo/recaptcha-v2-callback

   2. If everything is fine server will return the ID of your captcha:

      OK|2122988149
      Otherwise server will return an error code.

   3. After 15-20 seconds send GET request to get the result:

      GET https://2captcha.com/res.php?key=YOUR_API_KEY&action=get&id=2122988149
      If captcha is already solved server will respond with the answer token:

      OK|03AHJ_Vuve5Asa4koK3KSMyUkCq0vUFCR5Im4CwB7PzO3dCxIo11i53epEraq-uBO5mVm2XRikL8iKOWr0aG50sCuej9bXx5qcviUGSm4iK4NC_Q88flavWhaTXSh0VxoihBwBjXxwXuJZ-WGN5Sy4dtUl2wbpMqAj8Zwup1vyCaQJWFvRjYGWJ_TQBKTXNB5CCOgncqLetmJ6B6Cos7qoQyaB8ZzBOTGf5KSP6e-K9niYs772f53Oof6aJeSUDNjiKG9gN3FTrdwKwdnAwEYX-F37sI_vLB1Zs8NQo0PObHYy0b0sf7WSLkzzcIgW9GR0FwcCCm1P8lB-50GQHPEBJUHNnhJyDzwRoRAkVzrf7UkV8wKCdTwrrWqiYDgbrzURfHc2ESsp020MicJTasSiXmNRgryt-gf50q5BMkiRH7osm4DoUgsjc_XyQiEmQmxl5sqZP7aKsaE-EM00x59XsPzD3m3YI6SRCFRUevSyumBd7KmXE8VuzIO9lgnnbka4-eZynZa6vbB9cO3QjLH0xSG3-egcplD1uLGh79wC34RF49Ui3eHwua4S9XHpH6YBe7gXzz6_mv-o-fxrOuphwfrtwvvi2FGfpTexWvxhqWICMFTTjFBCEGEgj7_IFWEKirXW2RTZCVF0Gid7EtIsoEeZkPbrcUISGmgtiJkJ_KojuKwImF0G0CsTlxYTOU2sPsd5o1JDt65wGniQR2IZufnPbbK76Yh_KI2DY4cUxMfcb2fAXcFMc9dcpHg6f9wBXhUtFYTu6pi5LhhGuhpkiGcv6vWYNxMrpWJW_pV7q8mPilwkAP-zw5MJxkgijl2wDMpM-UUQ_k37FVtf-ndbQAIPG7S469doZMmb5IZYgvcB4ojqCW3Vz6Q
      If captcha is not solved yet server will return CAPCHA_NOT_READY result. Repeat your request in 5 seconds. If something went wrong server will return an error code.

3. In developer's console, execute the callback function verifyDemoRecaptcha passing the token string as an argument like: verifyDemoRecaptcha('TOKEN')
   Please note that each website has own reCAPTCHA implementation with unique callback definition and the callback function name will be different from our demo, or even an anonymous function can be used. This code snippet can help you to find the callback definition.