C# captcha solver

Solve and bypass Google reCAPTCHA, Image CAPTCHA, Arkose FunCaptcha, Cloudflare Turnstile, Cloudflare Challenge and any captcha with C# captcha solver.

No risk. Pay only for solved captchas
Fastest human-based C# captcha solving service

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How to automate solve and bypass any captcha with C#

You send a captcha to the C# captcha solver.
The server stores your captcha and returns the ID of your request.
The service completes the captcha solution and sends the answer back to the server.
You send a request to the server using the ID to retrieve the answer.

Get started fast with open-source repository — available in C# for integration.

C# captcha solver

Installation

The script package can be installed using the package installer or manually

Nuget

Install nuget package by link.

dotnet add package solvecaptcha-csharp

You can also install the library directly from GitHub. Clone the repository:

git clone https://github.com/solvercaptcha/solvecaptcha-csharp.git

Add the project as a dependency:

<ItemGroup>
  <ProjectReference Include="path/to/solvecaptcha-csharp/SolveCaptcha/SolveCaptcha.csproj" />
</ItemGroup>

We invite you to explore our GitHub repository where you can find libraries and SDK for easy integration with our API.

Configuration

Description of all the necessary parameters to configure the installed package

An instance of the SolveCaptcha class can be created like this:

SolveCaptcha solver = new SolveCaptcha('YOUR_API_KEY');

Also there are few options that can be configured:

solver.DefaultTimeout = 120;
solver.RecaptchaTimeout = 600;
solver.PollingInterval = 10;

SolveCaptcha instance options

Option	Default value	Description
defaultTimeout	120	Polling timeout in seconds for all captcha types except reCAPTCHA. Defines how long the SDK tries to get the answer from res.php API endpoint
recaptchaTimeout	600	Polling timeout for reCAPTCHA in seconds. Defines how long the SDK tries to get the answer from res.php API endpoint
pollingInterval	10	Interval in seconds between requests to res.php API endpoint, setting values less than 5 seconds is not recommended

IMPORTANT: once callback is defined for SolveCaptcha instance, all methods return only the captcha ID and DO NOT poll the API to get the result. The result will be sent to the callback URL. To get the answer manually use getResult method.

Solve captcha

When you submit any image-based captcha use can provide additional options to help solvecaptcha workers to solve it properly

Captcha options

Option	Default value	Description
numeric	0	Defines if captcha contains numeric or other symbols. See more info in the API docs
minLength	0	minimal answer length
maxLength	0	maximum answer length
phrase	0	defines if the answer contains multiple words or not
caseSensitive	0	defines if the answer is case sensitive
calc	0	defines captcha requires calculation
hintImg	-	an image with hint shown to workers with the captcha
hintText	-	hint or task text shown to workers with the captcha

Basic example

Example below shows a basic solver call example with error handling.

Normal captcha = new Normal();
captcha.SetFile("path/to/captcha.jpg");
captcha.SetMinLen(4);
captcha.SetMaxLen(20);
captcha.SetCaseSensitive(true);
captcha.SetLang("en");
try
{
    await solver.Solve(captcha);
    Console.WriteLine("Captcha solved: " + captcha.Code);
}
catch (Exception e)
{
    Console.WriteLine("Error occurred: " + e.Message);
}

To bypass a normal captcha (distorted text on image) use the following method. This method also can be used to recognize any text on the image.

Normal captcha = new Normal();
captcha.SetFile("path/to/captcha.jpg");
captcha.SetNumeric(4);
captcha.SetMinLen(4);
captcha.SetMaxLen(20);
captcha.SetPhrase(true);
captcha.SetCaseSensitive(true);
captcha.SetCalc(false);
captcha.SetLang("en");
captcha.SetHintImg(new FileInfo("path/to/hint.jpg"));
captcha.SetHintText("Type red symbols only");

Use this method to solve reCAPTCHA V2 and obtain a token to bypass the protection.

ReCaptcha captcha = new ReCaptcha();
captcha.SetSiteKey("6Le-wvkSVVABCPBMRTvw0Q4Muexq1bi0DJwx_mJ-");
captcha.SetUrl("https://mysite.com/page/with/recaptcha");
captcha.SetInvisible(true);
captcha.SetEnterprise(false);
captcha.SetAction("verify");
captcha.SetProxy("HTTPS", "login:password@IP_address:PORT");

This method provides reCAPTCHA V3 solver and returns a token.

ReCaptcha captcha = new ReCaptcha();
captcha.SetSiteKey("6Le-wvkSVVABCPBMRTvw0Q4Muexq1bi0DJwx_mJ-");
captcha.SetUrl("https://mysite.com/page/with/recaptcha");
captcha.SetVersion("v3");
captcha.SetEnterprise(false);
captcha.SetDomain("google.com");
captcha.SetAction("verify");
captcha.SetScore(0.3);
captcha.SetProxy("HTTPS", "login:password@IP_address:PORT");

Method to solve GeeTest puzzle captcha. Returns a set of tokens as JSON.

GeeTest captcha = new GeeTest();
captcha.SetGt("f2ae6cadcf7886856696502e1d55e00c");
captcha.SetApiServer("api-na.geetest.com");
captcha.SetChallenge("12345678abc90123d45678ef90123a456b");
captcha.SetUrl("https://mysite.com/captcha.html");
captcha.SetProxy("HTTPS", "login:password@IP_address:PORT");

This method can be used to bypass a captcha that requires to answer a question provided in clear text.

Text captcha = new Text();
captcha.SetText("If tomorrow is Saturday, what day is today?");
captcha.SetLang("en");

Best captcha solving service

Service is ranked among the best captcha solving service, according to independent analytics by CaptchaTheCat website.
Fast captcha solver

Service is incredibly fast captcha solver, thanks to its integration of machine learning (ML) technology.
Cheapest captcha solver

Service is cheapest due to the use of machine learning (ML) technology, which automates CAPTCHA solving at scale, reducing the need for manual labor and allowing us to offer lower prices without sacrificing quality.

Use cases

Bypassing captcha enables to automate captcha solving interactions and is used to optimize tasks such as automated testing, web scraping, accessibility, and improving security.

Accesability
Cybersecurity
Automated testing
Scarping

Captcha solver API

The API documentation contains examples of requests and responses. For the convenience of using the service, we have published libraries on GitHub for programming languages: Python, Java, C#, C++, Javascript, Ruby, PHP, and Go. We have also developed code examples for automatically solving reCAPTCHAs using tools like Selenium and Puppeteer.

Captcha solver API