Index

Download the api client based example codes:

New Audio Recognition API support

What are "Audio Recognition" challenges?

Audio recognition CAPTCHAs are challenges that typically require the user to listen to an audio clip and correctly input the series of letters or numbers they hear.

For your convenience, we implemented support for Audio Recognition API. If your software works with it, and supports minimal configuration, you should be able to decode Audios using Death By Captcha in no time.

  • Audio Recognition API: Provided the base64 string of the audio file and the language, the API returns the text of the audio that you will use to submit the form in the page with the Audio challenge.

Pricing

For the time being, price is $0.59/1K Audio Recognition challenges correctly solved. You will not be billed for Audios reported as incorrectly solved. Note that this pricing applies to new Audio Recognition challenges only, so only customers using this specific API will be charged said rate.

Audio Recognition API FAQ:

What`s the Audio Recognition API URL?

To use the Audio Recognition API you will have to send a HTTP POST Request to http://api.dbcapi.me/api/captcha

What are the POST parameters for the Audio Recognition API?

  • username: Your DBC account username
  • password: Your DBC account password
  • type=13: Type 13 specifies this is an Audio Recognition API
  • audio: Base64-encoded string representing the audio file data. We currently support only the MP3 format.
  • language: The detected language of the audio content. The supported languages are: en, fr, de, el, pt, ru

  • Example of Base64-encoded string audio:

    
    UklGRiQAAABXQVZFZm10IBAAAAABAAEAIlYAAESsAAACABAAZGF0YQQAAAAA
                

What languages are supported by the Audio Recognition API?

The supported languages are shown in the table below.

Language Code (language parameter) Language Name
en English
fr French
de German
el Greek
pt Portuguese
ru Russian
What`s the response from the Audio Recognition API?

The response from the Audio Recognition API follows the structure outlined below. It will be in the form of a string, as shown in the example below:


"This is an example response from the Audio Recognition API."
      

Using Audio Recognition API with api clients:


    /**
     * Death by Captcha PHP API Audio usage example
     *
     * @package DBCAPI
     * @subpackage PHP
     */

    /**
     * DBC API clients
     */
    require_once '../deathbycaptcha.php';

    $username = "username";  // DBC account username
    $password = "password";  // DBC account password
    $token_from_panel = "your-token-from-panel";  // DBC account authtoken

    // Use DeathByCaptcha_SocketClient() class if you want to use SOCKET API.
    $client = new DeathByCaptcha_HttpClient($username, $password);
    $client->is_verbose = true;

    // To use token the first parameter must be authtoken.
    // $client = new DeathByCaptcha_HttpClient("authtoken", $token_from_panel);

    echo "Your balance is {$client->balance} US cents\n";

    // Read the audio file and get the base64 encoded string
    try {
      $fileData = file_get_contents("images/audio.mp3");
      $base64Data = base64_encode($fileData);
    } catch (Exception $e) {
      echo 'An error occurred while reading the file: ',  $e->getMessage(), "\n";
    }

    //Put the type, the audio base64 string and the language
    $extra = [
      'type' => 13,
      'audio' => $base64Data,
      'language' => "en"
    ];

    // Put null the first parameter and add the extra payload
    if ($captcha = $client->decode(null, $extra)) {
        echo "CAPTCHA {$captcha['captcha']} uploaded\n";

        sleep(DeathByCaptcha_Client::DEFAULT_TIMEOUT);

        // Poll for CAPTCHA indexes:
        if ($text = $client->get_text($captcha['captcha'])) {
            echo "CAPTCHA {$captcha['captcha']} solved: {$text}\n";

            // Report an incorrectly solved CAPTCHA.
            // Make sure the CAPTCHA was in fact incorrectly solved!
            //$client->report($captcha['captcha']);
        }
    }
        

    # audio
    import deathbycaptcha
    import json
    import base64

    # Put your DBC account username and password here.
    username = "username"
    password = "password"

    # you can use authtoken instead of user/password combination
    # activate and get the authtoken from DBC users panel
    authtoken = "authtoken"

    # to use socket client
    # client = deathbycaptcha.SocketClient(username, password)

    # to use authtoken
    # client = deathbycaptcha.SocketClient(username, password, authtoken)

    client = deathbycaptcha.HttpClient(username, password)

    # Read the audio file and get the base64 string
    try:
      with open('images/audio.mp3', 'rb') as file:
        audio_data = file.read()
        base_string = base64.b64encode(audio_data).decode()
    except Exception as e:
      print("An error occurred while converting the file to base64: " + str(e))

    try:
        balance = client.get_balance()
        print(balance)

        # Put your CAPTCHA type, the base64 string and the language:
        captcha = client.decode(type=13, audio=base_string, language="en")
        if captcha:
            # The CAPTCHA was solved; captcha["captcha"] item holds its
            # numeric ID, and captcha["text"] its text token solution.
            print("CAPTCHA %s solved: %s" % (captcha["captcha"], captcha["text"]))

            if '':  # check if the CAPTCHA was incorrectly solved
                client.report(captcha["captcha"])

    except deathbycaptcha.AccessDeniedException:
        # Access to DBC API denied, check your credentials and/or balance
        print("error: Access to DBC API denied, check your credentials and/or balance")

        

    import com.DeathByCaptcha.AccessDeniedException;
    import com.DeathByCaptcha.Client;
    import com.DeathByCaptcha.HttpClient;
    import com.DeathByCaptcha.SocketClient;
    import com.DeathByCaptcha.Captcha;
    import org.json.JSONObject;

    import java.util.Base64;
    import java.nio.file.Files; 
    import java.nio.file.Paths;
    import java.io.IOException;

    class ExampleAudioCaptcha {
        public static void main(String[] args)
                throws Exception {

            // Put your DBC username & password or authtoken here:
            String username = "your_username_here";
            String password = "your_password_here";
            String authtoken = "your_authtoken_here";

            // The path to the audio file
            String filePath = "images/audio.mp3";
            String encodedString = null;

            // Read the audio file and encode the file to base64
            try {
              byte[] fileContent = Files.readAllBytes(Paths.get(filePath));
              encodedString = Base64.getEncoder().encodeToString(fileContent);
            } catch (IOException e) {
              e.printStackTrace();
            }

            String audio = encodedString;
            String language = "en";

            /* Death By Captcha Socket Client
               Client client = (Client) (new SocketClient(username, password));
               Death By Captcha http Client */
            Client client = (Client) (new HttpClient(username, password));
            client.isVerbose = true;

            /* Using authtoken
               Client client = (Client) new HttpClient(authtoken); */

            try {
                try {
                    System.out.println("Your balance is " + client.getBalance()
                                                          + " US cents");
                } catch (IOException e) {
                    System.out.println("Failed fetching balance: " + e.toString());
                    return;
                }

                Captcha captcha = null;
                try {
                    /* Upload a CAPTCHA and poll for its status with 120 seconds timeout.
                      Put you CAPTCHA audio file base64 encoded, the language and solving
                      timeout (in seconds) if 0 the default value take place.
                      please note we are specifying type=13 */
                    captcha = client.decode(13, audio, language);
                } catch (IOException e) {
                    System.out.println("Failed uploading CAPTCHA");
                    return;
                }
                if (null != captcha) {
                    System.out.println("CAPTCHA " + captcha.id + " solved: "
                                                               + captcha.text);

                    /* Report incorrectly solved CAPTCHA if necessary.
                       Make sure you've checked if the CAPTCHA was in fact incorrectly
                       solved, or else you might get banned as abuser. */
                    /*try {
                        if (client.report(captcha)) {
                            System.out.println("Reported as incorrectly solved");
                        } else {
                            System.out.println(
                                "Failed reporting incorrectly solved CAPTCHA");
                        }
                    } catch (IOException e) {
                        System.out.println(
                           "Failed reporting incorrectly solved CAPTCHA:" + e.toString());
                    }*/
                } else {
                    System.out.println("Failed solving CAPTCHA");
                }
            } catch (com.DeathByCaptcha.Exception e) {
                System.out.println(e);
            }


        }
    }

        

    // audio

    using System;
    using System.IO;
    using System.Collections;
    using DeathByCaptcha;

    namespace DBC_Examples.examples
    {
        public class AudioExample
        {
            public void Main()
            {
                // Put your DeathByCaptcha account username and password here.
                string username = "your username";
                string password = "your password";
                // string token_from_panel = "your-token-from-panel";

                /* Death By Captcha Socket Client
                   Client client = (Client) new SocketClient(username, password);
                   Death By Captcha http Client */
                Client client = (Client) new HttpClient(username, password);

                /* To use token authentication the first parameter must
                be "authtoken".
                Client client = (Client) new HttpClient("authtoken",
                                                        token_from_panel); */

                // Read the audio file and convert it to base64 string
                string base64String = null;
                try
                {
                  byte[] fileBytes = File.ReadAllBytes("images/audio.mp3");
                  base64String = Convert.ToBase64String(fileBytes);
                }
                catch (Exception ex)
                {
                  Console.WriteLine("An error occurred while converting the file to base64: " + ex.Message);
                }
                
                try
                {
                    double balance = client.GetBalance();

                    /* Upload a CAPTCHA and poll for its status. Put the audio base64 string,
                      the language, CAPTCHA type and desired solving timeout (in seconds)
                      here. If solved, you'll receive a DeathByCaptcha.Captcha object. */
                    Captcha captcha = client.Decode(Client.DefaultTimeout,
                        new Hashtable()
                        {
                            {"type", 13},
                            {"language", "en"},
                            {"audio", base64String}
                        });

                    if (null != captcha)
                    {
                        /* The CAPTCHA was solved; captcha.Id property holds
                        its numeric ID, and captcha.Text holds its text. */
                        Console.WriteLine("CAPTCHA {0} solved: {1}",
                            captcha.Id, captcha.Text);

    //                  if ( /* check if the CAPTCHA was incorrectly solved */)
    //                  {
    //                      client.Report(captcha);
    //                  }
                    }
                }
                catch (AccessDeniedException e)
                {
                    /* Access to DBC API denied,
                                check your credentials and/or balance */
                    Console.WriteLine("<<< catch : " + e.ToString());
                }
            }
        }
    }

        

    Imports System
    Imports System.IO
    Imports System.Threading
    Imports System.Collections

    Imports DeathByCaptcha

    Public Class Audio
        Sub Main(args As String())

            ' Put your DBC username & password or authtoken here:
            Dim username = "username"
            Dim password = "password"
            Dim token_from_panel = "your-token-from-panel"

            ' DBC Socket API client
            ' Dim client As New SocketClient(username, password)
            ' DBC HTTP API client
            Dim client As New HttpClient(username, password)

            ' To use token auth the first parameter must be "authtoken"
            ' Dim client As New HttpClient("authtoken", token_from_panel)

            ' Read the audio file and convert it to base64 string
            Dim base64String As String = Nothing
            Try
              Dim fileBytes As Byte() = File.ReadAllBytes("images/audio.mp3")
              base64String = Convert.ToBase64String(fileBytes)
            Catch ex As System.Exception
              Console.WriteLine("An error occurred while converting the file to base64: " & ex.Message)
            End Try

            Console.WriteLine(String.Format("Your balance is {0,2:f} US cents",
                                            client.Balance))

            ' Create the payload with the type and the data
            Dim extraData As New Hashtable()
            extraData.Add("type", 13)
            extraData.Add("language", "en")
            extraData.Add("audio", base64String)

            ' Upload a CAPTCHA and poll for its status. Put the Audio
            ' parameters, CAPTCHA type and desired solving timeout (in seconds)
            ' here. If solved, you'll receive a DeathByCaptcha.Captcha object.
            Dim captcha As Captcha = client.Decode(
                                    DeathByCaptcha.Client.DefaultTimeout, extraData)
            If captcha IsNot Nothing Then
                Console.WriteLine(String.Format("CAPTCHA {0:d} solved: {1}",
                                                captcha.Id, captcha.Text))

                ' Report an incorrectly solved CAPTCHA.
                ' Make sure the CAPTCHA was in fact incorrectly solved, do not
                ' just report it at random, or you might be banned as abuser.
                ' If client.Report(captcha) Then
                '    Console.WriteLine("Reported as incorrectly solved")
                ' Else
                '    Console.WriteLine("Failed reporting as incorrectly solved")
                ' End If
            End If
        End Sub
    End
        

    /*
    * Death by Captcha Node.js API Audio usage example
    */

    const fs = require('fs');
    const dbc = require('../deathbycaptcha');

    const username = 'username';     // DBC account username
    const password = 'password';     // DBC account password
    const token_from_panel = 'your-token-from-panel';   // DBC account authtoken

    // Read the audio file and convert it to base64 string
    let base64String = null;
    try {
      const fileData = fs.readFileSync('images/audio.mp3');
      base64String = fileData.toString('base64');
    } catch (error) {
      console.error('An error occurred while reading the file:', error);
    }

    // Death By Captcha Socket Client
    // const client = new dbc.SocketClient(username, password);
    // Death By Captcha http Client
    const client = new dbc.HttpClient(username, password);

    // To use token authentication the first parameter must be "authtoken"
    // const client = new dbc.HttpClient("authtoken", token_from_panel);

    // Get user balance
    client.get_balance((balance) => {
        console.log(balance);
    });

    // Solve captcha with type 13 & audio base64 string & language
    client.decode({extra: {type: 13, audio: base64String, language: "en"}}, (captcha) => {

        if (captcha) {
            console.log('Captcha ' + captcha['captcha'] + ' solved: '
                                                    + captcha['text']);

            /*
            * Report an incorrectly solved CAPTCHA.
            * Make sure the CAPTCHA was in fact incorrectly solved!
            * client.report(captcha['captcha'], (result) => {
            *   console.log('Report status: ' + result);
            * });
            */
        }

    });
        

Status: OK

Servers are fully operational with faster than average response time.
  • Average solving time
  • 4 seconds - Normal CAPTCHAs (1 min. ago)
  • 32 seconds - reCAPTCHA V2, V3, etc (1 min. ago)
  • 14 seconds - hCAPTCHA & others (1 min. ago)
Chrome and Firefox logos
Browser extensions available

Updates

  1. Feb 26: NEW TYPE ADDED - Now supporting Friendly CAPTCHA!! See the details at https://deathbycaptcha.com/api/friendly
  2. Nov 22: Now supporting Amazon WAF!! See the details at https://deathbycaptcha.com/api/amazonwaf
  3. Nov 01: Today our Socket API was affected by a technical issue for a few hours. It's now sorted and back to 100%, working optimally. We sincerely apologize for the inconvenience this may have caused you. If you were affected, please don't hesitate to contact us: https://deathbycaptcha.com/contact and we'll be happy to assist/compensate you!

  4. Previous updates…

Support

Our system is designed to be completely user-friendly and easy-to-use. Should you have any trouble with it, simply email us at DBC technical support emailcom, and a support agent will get back to you as soon as possible.

Live Support

Available Monday to Friday (10am to 4pm EST) Live support image. Link to live support page