Installation

Install nuget package from nuget:

dotnet add package 2captcha-csharp

Configuration

TwoCaptcha instance can be created like this:

TwoCaptcha solver = new TwoCaptcha('YOUR_API_KEY');

Also there are few options that can be configured:

solver.SoftId = 123;
solver.Callback = "https://your.site/result-receiver";
solver.DefaultTimeout = 120;
solver.RecaptchaTimeout = 600;
solver.PollingInterval = 10;

TwoCaptcha instance options

IMPORTANT: once Callback is defined for TwoCaptcha 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 2captcha workers to solve it properly.

Captcha options

Below you can find basic examples for every captcha type. Check out examples directory to find more examples with all available options.

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);
}

Normal Captcha

^{API method description.}

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");

Text Captcha

^{API method description.}

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");

reCAPTCHA v2

^{API method description.}

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");

reCAPTCHA v3

^{API method description.}

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");

FunCaptcha

^{API method description.}

FunCaptcha (Arkoselabs) solving method. Returns a token.

FunCaptcha captcha = new FunCaptcha();
captcha.SetSiteKey("69A21A01-CC7B-B9C6-0F9A-E7FA06677FFC");
captcha.SetUrl("https://mysite.com/page/with/funcaptcha");
captcha.SetSUrl("https://client-api.arkoselabs.com");
captcha.SetUserAgent("Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/83.0.4103.61 Safari/537.36");
captcha.SetData("anyKey", "anyValue");
captcha.SetProxy("HTTPS", "login:password@IP_address:PORT");

GeeTest

^{API method description.}

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");

GeeTest v4

^{API method description.}

Method to solve GeeTest v4 puzzle captcha. Returns a set of tokens as JSON.

GeeTestV4 captcha = new GeeTestV4();
captcha.SetCaptchaId("72bf15796d0b69c43867452fea615052");
captcha.SetChallenge("12345678abc90123d45678ef90123a456b");
captcha.SetUrl("https://mysite.com/captcha.html");

KeyCaptcha

^{API method description.}

Token-based method to solve KeyCaptcha.

KeyCaptcha captcha = new KeyCaptcha();
captcha.SetUserId(10);
captcha.SetSessionId("493e52c37c10c2bcdf4a00cbc9ccd1e8");
captcha.SetWebServerSign("9006dc725760858e4c0715b835472f22");
captcha.SetWebServerSign2("2ca3abe86d90c6142d5571db98af6714");
captcha.SetUrl("https://www.keycaptcha.ru/demo-magnetic/");
captcha.SetProxy("HTTPS", "login:password@IP_address:PORT");

Capy

^{API method description.}

Token-based method to bypass Capy puzzle captcha.

Capy captcha = new Capy();
captcha.SetSiteKey("PUZZLE_Abc1dEFghIJKLM2no34P56q7rStu8v");
captcha.SetUrl("https://www.mysite.com/captcha/");
captcha.SetProxy("HTTPS", "login:password@IP_address:PORT");

Grid

^{API method description.}

Grid method is originally called Old reCAPTCHA V2 method. The method can be used to bypass any type of captcha where you can apply a grid on image and need to click specific grid boxes. Returns numbers of boxes.

Grid captcha = new Grid();
captcha.SetFile("path/to/captcha.jpg");
captcha.SetRows(3);
captcha.SetCols(3);
captcha.SetPreviousId(0);
captcha.SetCanSkip(false);
captcha.SetLang("en");
captcha.SetHintImg(new FileInfo("path/to/hint.jpg"));
captcha.SetHintText("Select all images with an Orange");

Canvas

^{API method description.}

Canvas method can be used when you need to draw a line around an object on image. Returns a set of points' coordinates to draw a polygon.

Canvas captcha = new Canvas();
captcha.SetFile("path/to/captcha.jpg");
captcha.SetPreviousId(0);
captcha.SetCanSkip(false);
captcha.SetLang("en");
captcha.SetHintImg(new FileInfo("path/to/hint.jpg"));
captcha.SetHintText("Draw around apple");

ClickCaptcha

^{API method description.}

ClickCaptcha (Coordinates) method returns coordinates of points on captcha image. Can be used if you need to click on particular points on the image.

Coordinates captcha = new Coordinates();
captcha.SetFile("path/to/captcha.jpg");
captcha.SetLang("en");
captcha.SetHintImg(new FileInfo("path/to/hint.jpg"));
captcha.SetHintText("Select all images with an Orange");

Rotate

^{API method description.}

This method can be used to solve a captcha that asks to rotate an object. Mostly used to bypass FunCaptcha. Returns the rotation angle.

Rotate captcha = new Rotate();
captcha.SetFile("path/to/captcha.jpg");
captcha.SetAngle(40);
captcha.SetLang("en");
captcha.SetHintImg(new FileInfo("path/to/hint.jpg"));
captcha.SetHintText("Put the images in the correct way up");

Audio Captcha

^{API method description.}

This method can be used to solve a audio captcha (mp3 formats only). You must provide the language as lang = 'en'. Supported languages are "en", "ru", "de", "el", "pt", "fr".

AudioCaptcha captcha = new AudioCaptcha();
byte[] bytes = File.ReadAllBytes("../../resources/audio-en.mp3");
string base64EncodedImage = Convert.ToBase64String(bytes);
captcha.SetBase64(base64EncodedImage);

Yandex

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

Yandex captcha = new Yandex();
captcha.SetSiteKey("Y5Lh0tiycconMJGsFd3EbbuNKSp1yaZESUOIHfeV");
captcha.SetUrl("https://rutube.ru");

Lemin Cropped Captcha

^{API method description.}

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

Lemin captcha = new Lemin();
captcha.SetCaptchaId("CROPPED_d3d4d56_73ca4008925b4f83a8bed59c2dd0df6d");
captcha.SetApiServer("api.leminnow.com");
captcha.SetUrl("http://sat2.aksigorta.com.tr");

Cloudflare Turnstile

^{API method description.}

Use this method to solve Cloudflare Turnstile and obtain a token to bypass the protection.

Turnstile captcha = new Turnstile();
captcha.SetSiteKey("0x4AAAAAAAChNiVJM_WtShFf");
captcha.SetUrl("https://ace.fusionist.io");
captcha.SetData("foo");
captcha.SetPageData("bar");
captcha.SetAction("baz");

Amazon WAF

^{API method description.}

Use this method to solve Amazon WAF Captcha also known as AWS WAF Captcha is a part of Intelligent threat mitigation for Amazon AWS. Returns JSON with the token.

AmazonWaf captcha = new AmazonWaf();
captcha.SetSiteKey("AQIDAHjcYu/GjX+QlghicBgQ/7bFaQZ+m5FKCMDnO+vTbNg96AF5H1K/siwSLK7RfstKtN5bAAAAfjB8BgkqhkiG9w0BBwagbzBtAgEAMGgGCSqGSIb3DQEHATAeBglg");
captcha.SetUrl("https://non-existent-example.execute-api.us-east-1.amazonaws.com");
captcha.SetContext("test_iv");
captcha.SetIV("test_context");

Friendly Captcha

^{API method description.}

Use this method to solve Friendly Captcha. Returns a token to bypass the captcha.

[!IMPORTANT] To successfully use the received token, the captcha widget must not be loaded on the page. To do this, you need to abort request to /friendlycaptcha/...module.min.js on the page. When the captcha widget is already loaded on the page, there is a high probability that the received token will not work.

FriendlyCaptcha captcha = new FriendlyCaptcha();
captcha.SetSiteKey("2FZFEVS1FZCGQ9");
captcha.SetUrl("https://example.com");

MTCaptcha

^{API method description.}

Use this method to solve MTCaptcha. Returns a token to bypass the captcha.

MTCaptcha captcha = new MTCaptcha();
captcha.SetSiteKey("MTPublic-KzqLY1cKH");
captcha.SetPageUrl("https://2captcha.com/demo/mtcaptcha");

Cutcaptcha

^{API method description.}

Use this method to solve Cutcaptcha. Returns a token to bypass the captcha.

Cutcaptcha captcha = new Cutcaptcha();
captcha.SetMiseryKey("a1488b66da00bf332a1488993a5443c79047e752");
captcha.SetPageUrl("https://example.cc/foo/bar.html");
captcha.SetApiKey("SAb83IIB");

CyberSiARA

^{API method description.}

Use this method to solve CyberSiARA. Returns a token to bypass the captcha.

CyberSiARA cyberSiARA = new CyberSiARA();
cyberSiARA.SetMasterUrlId("tpjOCKjjpdzv3d8Ub2E9COEWKt1vl1Mv");
cyberSiARA.SetPageUrl("https://demo.mycybersiara.com/");
cyberSiARA.SetUserAgent("Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/115.0.0.0 Safari/537.36");

DataDome

^{API method description.}

Use this method to solve DataDome captcha.

[!IMPORTANT] To solve the DataDome captcha, you must use a proxy. It is recommended to use residential proxies.

DataDome dataDome = new DataDome();
dataDome.SetCapthaUrl("https://geo.captcha-delivery.com/captcha/?initialCid=AHrlqAAA...P~XFrBVptk&t=fe&referer=https%3A%2F%2Fhexample.com&s=45239&e=c538be..c510a00ea");
dataDome.SetPageUrl("https://example.com/");
dataDome.SetProxy("http", "username:password@1.2.3.4:5678");
dataDome.SetUserAgent("Mozilla/5.0 (Linux; Android 10; K) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/119.0.0.0 Mobile Safari/537.3");

atbCAPTCHA

^{API method description.}

Use this method to solve atbCAPTCHA. Returns a token to bypass the captcha.

AtbCAPTCHA atbCAPTCHA = new AtbCAPTCHA();
atbCAPTCHA.SetAppId("af23e041b22d000a11e22a230fa8991c");
atbCAPTCHA.SetApiServer("https://cap.aisecurius.com");
atbCAPTCHA.SetPageUrl("https://www.example.com/");

Tencent

^{API method description.}

Use this method to solve Tencent captcha. Returns a token to bypass the captcha.

Tencent tencent = new Tencent();
tencent.SetAppId("190014885");
tencent.SetPageUrl("https://www.example.com/");

Other methods

send / getResult

These methods can be used for manual captcha submission and answer polling.

string captchaId = await solver.Send(captcha);

Task.sleep(20 * 1000);

string code = await solver.GetResult(captchaId);

balance

^{API method description.}

Use this method to get your account's balance

double balance = await solver.Balance();

report

^{API method description.}

Use this method to report good or bad captcha answer.

await solver.Report(captcha.Id, true); // captcha solved correctly
await solver.Report(captcha.Id, false); // captcha solved incorrectly

Proxies

You can pass your proxy as an additional argument for methods: recaptcha, funcaptcha, geetest, geetest v4, keycaptcha, capy puzzle, lemin, cloudflare turnstile, amazon waf, friendly captcha, mtcaptcha, cutcaptcha, cybersiara, datadome, atbcaptcha, tencent and etc. The proxy will be forwarded to the API to solve the captcha.

We have our own proxies that we can offer you. Buy residential proxies for avoid restrictions and blocks. Quick start.

captcha.SetProxy("HTTPS", "login:password@IP_address:PORT");

Error handling

If case of an error captcha solver throws an exception. It's important to properly handle these cases. We recommend to use try catch to handle exceptions. The list of all errors can be found in the API documentation.

try
{
    await solver.Solve(captcha);
}
catch (ValidationException e)
{
    // invalid parameters passed
}
catch (NetworkException e)
{
    // network error occurred
}
catch (ApiException e)
{
    // api respond with error
}
catch (TimeoutException e)
{
    // captcha is not solved so far
}

Get in touch

<a href="mailto:support@2captcha.com"><img src="https://github.com/user-attachments/assets/539df209-7c85-4fa5-84b4-fc22ab93fac7" width="80" height="30" alt="Send email to support"></a> <a href="https://2captcha.com/support/tickets/new"><img src="https://github.com/user-attachments/assets/be044db5-2e67-46c6-8c81-04b78bd99650" width="81" height="30" alt="Create ticket"></a>

Join the team 👪

There are many ways to contribute, of which development is only one! Find your next job. Open positions: AI experts, scrapers, developers, technical support, and much more! 😍

<a href="mailto:job@2captcha.com"><img src="https://github.com/user-attachments/assets/36d23ef5-7866-4841-8e17-261cc8a4e033" width="80" height="30" alt="Send email to support"></a>

License

The code in this repository is licensed under the MIT License. See the LICENSE file for more details.

Graphics and Trademarks

The graphics and trademarks included in this repository are not covered by the MIT License. Please contact <a href="mailto:support@2captcha.com">support</a> for permissions regarding the use of these materials.