DeathByCaptcha

Introduction

DeathByCaptcha offers APIs of two types — HTTP and socket-based, with the latter being recommended for having faster responses and overall better performance. Switching between different APIs is usually as easy as changing the client class and/or package name, the interface stays the same.

When using the socket API, please make sure that outgoing TCP traffic to api.dbcapi.me to the ports range 8123–8130 is not blocked on your side.

How to Use DBC API Clients

Common Clients' Interface

All clients have to be instantiated with two string arguments: your DeathByCaptcha account's username and password.

All clients provides a few methods to handle your CAPTCHAs and your DBC account. Below you will find those methods' short summary and signatures in pseudo-code. Check the example scripts and the clients' source code for more details.

Upload()

Uploads a CAPTCHA to the DBC service for solving, returns uploaded CAPTCHA details on success, NULL otherwise. Here are the signatures in pseudo-code:

dict deathbycaptcha.Client.upload(file imageFile)

dict deathbycaptcha.Client.upload(str imageFileName)

GetCaptcha()

Fetches uploaded CAPTCHA details, returns NULL on failures.

dict deathbycaptcha.Client.get_captcha(dict imageFileName)

Report()

Reports incorrectly solved CAPTCHA for refund, returns true on success, false otherwise.

Please make sure the CAPTCHA you're reporting was in fact incorrectly solved, do not just report them thoughtlessly, or else you'll be flagged as abuser and banned.

bool deathbycaptcha.Client.report(int captchaId)

Decode()

This method uploads a CAPTCHA, then polls for its status until it's solved or times out; returns solved CAPTCHA details on success, NULL otherwise.

dict deathbycaptcha.Client.decode(file imageFile, int timeout)

dict deathbycaptcha.Client.decode(str imageFileName, int timeout)

GetBalance()

Fetches your current DBC credit balance (in US cents).

float deathbycaptcha.Client.get_balance()

CAPTCHA objects/details hashes

Use simple hashes (dictionaries, associative arrays etc.) to store CAPTCHA details, keeping numeric IDs under "captcha" key, CAPTCHA text under "text" key, and the correctness flag under "is_correct" key.

Example

Below you can find a DBC API client usage examples.

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

// Put your DBC account username and password here.
const username = 'username';     // DBC account username
const password = 'password';     // DBC account password
const captcha_file = 'test.jpg';    // Image filename

// Use deathbycaptcha.HttpClient for HTTP API.
const client = new dbc.SocketClient(username, password);

const balance = client.get_balance()

// Put your CAPTCHA file name or file-like object, and optional
// solving timeout (in seconds) here:
client.get_balance((balance) => {
    console.log(balance);
});
client.decode({captcha: captcha_file, extra: {type: 2}}, (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);
            // });
    }
});

New Recaptcha API support

What's "new reCAPTCHA/noCAPTCHA"?

They're new reCAPTCHA challenges that typically require the user to identify and click on certain images. They're not to be confused with traditional word/number reCAPTCHAs (those have no images).

For your convinience, we implemented support for New Recaptcha API. If your software works with it, and supports minimal configuration, you should be able to decode captchas using New Recaptcha API in no time.

We provide two different types of New Recaptcha API:

Coordinates API FAQ:

What's the Coordinates API URL?
To use the Coordinates API you will have to send a HTTP POST Request to http://api.dbcapi.me/api/captcha

What are the POST parameters for the Coordinates API?

What's the response from the Coordinates API?

Image Group API FAQ:

What's the Image Group API URL?
To use the Image Group API you will have to send a HTTP POST Request to http://api.dbcapi.me/api/captcha

What are the POST parameters for the Image Group API?

What's the response from the Image Group API?

New Recaptcha by Token API support (reCAPTCHA v2 and reCAPTCHA v3)

What's "new reCAPTCHA by Token"?

They're new reCAPTCHA challenges that typically require the user to identify and click on certain images. They're not to be confused with traditional word/number reCAPTCHAs (those have no images).

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

reCAPTCHA v2 API FAQ:

What's the Token Image API URL?
To use the Token Image API you will have to send a HTTP POST Request to http://api.dbcapi.me/api/captcha

What are the POST parameters for the Token image API?

The proxy parameter is optional, but we strongly recommend to use one to prevent token rejection by the provided page due to inconsistencies between the IP that solved the captcha (ours if no proxy is provided) and the IP that submitted the token for verification (yours).

Note: If proxy is provided, proxytype is a required parameter.

Full example of token_params:

{
  "proxy": "http://127.0.0.1:3128",
  "proxytype": "HTTP",
  "googlekey": "6Le-wvkSAAAAAPBMRTvw0Q4Muexq9bi0DJwx_mJ-",
  "pageurl": "http://test.com/path_with_recaptcha"
}

Example of token_params for google search captchas:

{
  "googlekey": "6Le-wvkSA...",
  "pageurl": "...",
  "data-s": "IUdfh4rh0sd..."
}

What's the response from the Token image API?
The token image API response has the same structure as regular captchas' response. Refer to Polling for uploaded CAPTCHA status for details about the response. The token will come in the text key of the response. It's valid for one use and has a 2 minute lifespan. It will be a string like the following:

"03AOPBWq_RPO2vLzyk0h8gH0cA2X4v3tpYCPZR6Y4yxKy1s3Eo7CHZRQntxrdsaD2H0e6S3547xi1FlqJB4rob46J0-wfZMj6YpyVa0WGCfpWzBWcLn7tO_EYsvEC_3kfLNINWa5LnKrnJTDXTOz-JuCKvEXx0EQqzb0OU4z2np4uyu79lc_NdvL0IRFc3Cslu6UFV04CIfqXJBWCE5MY0Ag918r14b43ZdpwHSaVVrUqzCQMCybcGq0yxLQf9eSexFiAWmcWLI5nVNA81meTXhQlyCn5bbbI2IMSEErDqceZjf1mX3M67BhIb4"

What's "new reCAPTCHA v3"?

This API is quite similar to the tokens(reCAPTCHA v2) API. Only 2 new parameters were added, one for the action and other for the minimal score(min-score)

reCAPTCHA v3 returns a score from each user, that evaluate if user is a bot or human. Then the website uses the score value that could range from 0 to 1 to decide if will accept or not the requests. Lower scores near to 0 are identified as bot.

The action parameter at reCAPTCHA v3 is an additional data used to separate different captcha validations like for example login, register, sales, etc.

reCAPTCHA v3 API FAQ:

What is action in reCAPTCHA v3?
Is a new parameter that allows processing user actions on the website differently.

To find this we need to inspect the javascript code of the website looking for call of grecaptcha.execute function. Example: 

grecaptcha.execute('6Lc2fhwTAAAAAGatXTzFYfvlQMI2T7B6ji8UVV_f', {action: something})

Sometimes it's really hard to find it and we need to look through all javascript files. We may also try to find the value of action parameter inside ___grecaptcha_cfg configuration object. Also we can call grecaptcha.execute and inspect javascript code. The API will use "verify" default value it if we won't provide action in our request.

What is min-score in reCAPTCHA v3 API?
The minimal score needed for the captcha resolution. We recommend using the 0.3 min-score value, scores highers than 0.3 are hard to get.

What are the POST parameters for the reCAPTCHA v3 API?

The proxy parameter is optional, but we strongly recommend to use one to prevent rejection by the provided page due to inconsistencies between the IP that solved the captcha (ours if no proxy is provided) and the IP that submitted the solution for verification (yours).

Note: If proxy is provided, proxytype is a required parameter.

Full example of token_params:

{
  "proxy": "http://127.0.0.1:3128",
  "proxytype": "HTTP",
  "googlekey": "6Le-wvkSAAAAAPBMRTvw0Q4Muexq9bi0DJwx_mJ-",
  "pageurl": "http://test.com/path_with_recaptcha",
  "action": "example/action",
  "min_score": 0.3
}

What's the response from reCAPTCHA v3 API?
The response has the same structure as regular captcha. Refer to Polling for uploaded CAPTCHA status for details about the response. The solution will come in the text key of the response. It's valid for one use and has a 1 minute lifespan.