Go captcha solver: Bypass reCAPTCHA, Cloudflare, hCaptcha, Amazon and more

Use the Go captcha solver to automatically bypass any captcha — including reCAPTCHA v2, Invisible, v3, Enterprise, hCaptcha, Cloudflare Turnstile, GeeTest sliders, Amazon AWS WAF, FunCaptcha, and both image and text-based captchas.

✅ Supported captcha solvers

To get started quickly, check out the captcha solver API documentation.

Helpful links:

🛠️ Features

Fast and fully automated captcha solving
Native support for Go 1.18+
Uses standard net/http and JSON APIs — no external dependencies
Easy integration with any Go backend, CLI tool, or scraper
Supports async solving via goroutines and channels
Pay only for successful solves
99.9% uptime
24/7 developer support

📦 Use cases

Accessibility automation
Web scraping
Automating form submissions in Go-powered services
Running solvers in goroutines or background jobs
QA pipelines and headless test automation
Security testing and bot protection research

Need help integrating with your Go project? Open an issue or fork this repo to contribute.

Go captcha solver: Bypass reCAPTCHA, Cloudflare, hCaptcha, Amazon and more
Get in touch
License

Installation

To install the api client, use this:

go get -u github.com/solvercaptcha/solvecaptcha-go

Configuration

Import the module like this:

import (
        "github.com/solvercaptcha/solvecaptcha-go"
)

Client instance can be created like this:

client := apisolvecaptcha.NewClient("YOUR_API_KEY")

There are few options that can be configured:

client.DefaultTimeout = 120
client.RecaptchaTimeout = 600
client.PollingInterval = 100

Client instance options

Option	Default value	Description
default_timeout	120	Timeout in seconds for all captcha types except reCAPTCHA. Defines how long the module tries to get the answer from `res.php` API endpoint
recaptcha_timeout	600	Timeout for reCAPTCHA in seconds. Defines how long the module tries to get the answer from `res.php` API endpoint
polling_interval	10	Interval in seconds between requests to `res.php` API endpoint, setting values less than 5 seconds is not recommended

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
min_len	0	minimal answer length
max_len	0	maximum answer length
phrase	0	defines if the answer contains multiple words or not
case_sensitive	0	defines if the answer is case sensitive
calc	0	defines captcha requires calculation
lang	-	defines the captcha language, see the list of supported languages
hint_img	-	an image with hint shown to workers with the captcha
hint_text	-	hint or task text shown to workers with the captcha

Below you can find basic examples for every captcha type, check out the code below.

Basic example

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

captcha := apisolvecaptcha.Normal{
   File: "/path/to/normal.jpg",
}

code, err := client.Solve(captcha.ToRequest())
if err != nil {
	if err == apisolvecaptcha.ErrTimeout {
		log.Fatal("Timeout");
	} else if err == apisolvecaptcha.ErrApi {
		log.Fatal("API error");
	} else if err == apisolvecaptcha.ErrNetwork {
		log.Fatal("Network error");
	} else {
		log.Fatal(err);
	}
}
fmt.Println("code "+code)

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.

captcha:= apisolvecaptcha.Normal{
   File: "/path/to/normal.jpg",
   Numeric: 4,
   MinLen: 4,
   MaxLen: 20,
   Phrase: true,
   CaseSensitive: true,
   Lang: "en",
   HintImgFile: "/path/to/hint.jpg",
   HintText: "Type red symbols",
}

Text Captcha

^{API method description.}

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

captcha:= apisolvecaptcha.Text{
   Text: "If tomorrow is Saturday, what day is today?",
   Lang: "en",
}

reCAPTCHA v2

^{API method description.}

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

captcha := apisolvecaptcha.ReCaptcha{
   SiteKey: "6Le-wvkSVVABCPBMRTvw0Q4Muexq1bi0DJwx_mJ-",
   Url: "https://mysite.com/page/with/recaptcha",
   Invisible: true,
   Action: "verify",
}
req := captcha.ToRequest()
req.SetProxy("HTTPS", "login:password@IP_address:PORT")
code, err := client.Solve(req)

reCAPTCHA v3

^{API method description.}

This method provides reCAPTCHA V3 solver and returns a token.

captcha := apisolvecaptcha.ReCaptcha{
   SiteKey: "6Le-wvkSVVABCPBMRTvw0Q4Muexq1bi0DJwx_mJ-",
   Url: "https://mysite.com/page/with/recaptcha",
   Version: "v3",
   Action: "verify",
   Score: 0.3,
}
req := captcha.ToRequest()
req.SetProxy("HTTPS", "login:password@IP_address:PORT")
code, err := client.Solve(req)

reCAPTCHA Enterprise

^{API method description.}

reCAPTCHA Enterprise can be used as reCAPTCHA V2 and reCAPTCHA V3. Below is a usage example for both versions.

// reCAPTCHA V2
captcha:=  apisolvecaptcha.ReCaptcha({
   SiteKey: "6Le-wvkSVVABCPBMRTvw0Q4Muexq1bi0DJwx_mJ-",
   Url: "https://mysite.com/page/with/recaptcha",
   Invisible: true,
   Action: "verify",
   Enterprise: true,
})

// reCAPTCHA V3
captcha := apisolvecaptcha.ReCaptcha{
   SiteKey: "6Le-wvkSVVABCPBMRTvw0Q4Muexq1bi0DJwx_mJ-",
   Url: "https://mysite.com/page/with/recaptcha",
   Version: "v3",
   Action: "verify",
   Score: 0.3,
   Enterprise: true,
}

req := captcha.ToRequest()
req.SetProxy("HTTPS", "login:password@IP_address:PORT")
code, err := client.Solve(req)

hCaptcha

^{API method description.}

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

captcha := apisolvecaptcha.HCaptcha{
   SiteKey: "10000000-ffff-ffff-ffff-000000000001",
   Url: "https://accounts.hcaptcha.com/demo",
}
req := captcha.ToRequest()
req.SetProxy("HTTPS", "login:password@IP_address:PORT")
code, err := client.Solve(req)

### FunCaptcha

<sup>[API method description.](https://solvecaptcha.com/captcha-solver-api#solving_funcaptcha_new)</sup>

FunCaptcha (Arkoselabs) solving method. Returns a token.

```go
captcha := apisolvecaptcha.FunCaptcha{
   SiteKey: "69A21A01-CC7B-B9C6-0F9A-E7FA06677FFC",
   Url: "https://mysite.com/page/with/funcaptcha",
   Surl: "https://client-api.arkoselabs.com",
   UserAgent: "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/83.0.4103.61 Safari/537.36",
   Data: map[string]string{"anyKey":"anyValue"},
}
req := captcha.ToRequest()
req.SetProxy("HTTPS", "login:password@IP_address:PORT")
code, err := client.Solve(req)

GeeTest

^{API method description.}

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

captcha := apisolvecaptcha.GeeTest{
   GT: "f2ae6cadcf7886856696502e1d55e00c",
   ApiServer: "api-na.geetest.com",
   Challenge: "12345678abc90123d45678ef90123a456b",
   Url: "https://mysite.com/captcha.html",
}
req := captcha.ToRequest()
req.SetProxy("HTTPS", "login:password@IP_address:PORT")
code, err := client.Solve(req)

GeeTest V4

^{API method description.}

Use this method to solve GeeTest v4. Returns the response in JSON.

captcha:= apisolvecaptcha.GeeTestV4{
    CaptchaId: "e392e1d7fd421dc63325744d5a2b9c73",
    Url: "https://www.site.com/page/",
}

KeyCaptcha

^{API method description.}

Token-based method to solve KeyCaptcha.

captcha:= apisolvecaptcha.KeyCaptcha{
   UserId: 10,
   SessionId: "493e52c37c10c2bcdf4a00cbc9ccd1e8",
   WebServerSign: "9006dc725760858e4c0715b835472f22",
   WebServerSign2: "9006dc725760858e4c0715b835472f22",
   Url: "https://www.keycaptcha.ru/demo-magnetic/",
}
req := captchaToRequest()
req.SetProxy("HTTPS", "login:password@IP_address:PORT")
code, err := client.Solve(req)

Capy

Token-based method to bypass Capy puzzle captcha.

captcha:= apisolvecaptcha.Capy{
   SiteKey: "PUZZLE_Abc1dEFghIJKLM2no34P56q7rStu8v",
   Url: "https://www.mysite.com/captcha/",
}
req := captchaToRequest()
req.SetProxy("HTTPS", "login:password@IP_address:PORT")
code, err := client.Solve(req)

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.

captcha:= apisolvecaptcha.Grid{
    File: "path/to/captcha.jpg",
    Rows: 3,
    Cols: 3,
    PreviousId: 0,
    CanSkip: false,
    Lang: "en",
    HintImageFile: "path/to/hint.jpg",
    HintText: "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.

captcha:= apisolvecaptcha.Canvas{
    File: "path/to/captcha.jpg",
    PreviousId: 0,
    CanSkip: false,
    Lang: "en",
    HintImageFile: "path/to/hint.jpg",
    HintText: "Draw around apple",
}

ClickCaptcha

^{API method description.}

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

captcha:= apisolvecaptcha.Coordinates{
    File: "path/to/captcha.jpg",
    Lang: "en",
    HintImageFile: "path/to/hint.jpg",
    HintText: "Connect the dots",
}

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.

captcha:= apisolvecaptcha.Rotate{
    File: "path/to/captcha.jpg",
    Angle: 15,
    Lang: "en",
    HintImageFile: "path/to/hint.jpg",
    HintText: "Put the images in the correct way",
}

Amazon WAF

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.

captcha:= apisolvecaptcha.AmazonWAF {
   Iv: "CgAHbCe2GgAAAAAj",
   SiteKey: "0x1AAAAAAAAkg0s2VIOD34y5",
   Url: "https://non-existent-example.execute-api.us-east-1.amazonaws.com/latest",
   Context: "9BUgmlm48F92WUoqv97a49ZuEJJ50TCk9MVr3C7WMtQ0X6flVbufM4n8mjFLmbLVAPgaQ1Jydeaja94iAS49ljb",
   ChallengeScript: "https://41bcdd4fb3cb.610cd090.us-east-1.token.awswaf.com/41bcdd4fb3cb/0d21de737ccb/cd77baa6c832/challenge.js"
   CaptchaScript: "https://41bcdd4fb3cb.610cd090.us-east-1.captcha.awswaf.com/41bcdd4fb3cb/0d21de737ccb/cd77baa6c832/captcha.js"
}

Cloudflare Turnstile

^{API method description.}

Use this method to solve Cloudflare Turnstile. Returns JSON with the token.

captcha:= apisolvecaptcha.CloudflareTurnstile{
   SiteKey: "0x1AAAAAAAAkg0s2VIOD34y5",
   Url: "http://mysite.com/",
}

Lemin Cropped Captcha

Use this method to solve Lemin Captcha challenge. Returns JSON with answer containing the following values: answer, challenge_id.

captcha:= Lemin{
   CaptchaId: "CROPPED_3dfdd5c_d1872b526b794d83ba3b365eb15a200b",
   Url:   "https://www.site.com/page/",
   DivId:     "lemin-cropped-captcha",
   ApiServer: "api.leminnow.com",
}

CyberSiARA

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

captcha:= apisolvecaptcha.CyberSiARA{
   MasterUrlId: "12333-3123123",
   Url: "https://test.com",
   UserAgent: "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/83.0.4103.61 Safari/537.36",
}

DataDome

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

Important

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

captcha:= apisolvecaptcha.DataDome{
   Url: "https://test.com",
   CaptchaUrl: "https://test.com/captcha/",
   Proxytype: "http",
   Proxy: "proxyuser:[email protected]:3128",
   UserAgent: "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/83.0.4103.61 Safari/537.36",
}

MTCaptcha

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

captcha:= apisolvecaptcha.MTCaptcha{
   Url: "https://service.mtcaptcha.com/mtcv1/demo/index.html",
   SiteKey: "MTPublic-DemoKey9M",
}

Yandex

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

captcha:= apisolvecaptcha.Yandex{
   Url: "https://example.com",
   SiteKey: "Y5Lh0tiycconMJGsFd3EbbuNKSp1yaZESUOIHfeV",
}

Tencent

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

tencentCaptcha := apisolvecaptcha.Tencent{
   AppId: "2092215077",
   Url:   "http://lcec.lclog.cn/cargo/NewCargotracking?blno=BANR01XMHB0004&selectstate=BLNO",
}

atbCAPTCHA

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

atbCaptcha := apisolvecaptcha.AtbCAPTCHA{
   AppId:     "af23e041b22d000a11e22a230fa8991c",
   Url:       "https://www.playzone.vip/",
   ApiServer: "https://cap.aisecurius.com",
}

Cutcaptcha

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

captcha:= apisolvecaptcha.Cutcaptcha{
   MiseryKey: "a1488b66da00bf332a1488993a5443c79047e752",
   DataApiKey: "SAb83IIB",
   Url: "https://example.cc/foo/bar.html",
}

Friendly Captcha

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

captcha:= apisolvecaptcha.Friendly{
   Url: "https://example.com",
   SiteKey: "2FZFEVS1FZCGQ9",
}

Audio Captcha

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

audio := apisolvecaptcha.Audio{
   Base64: fileBase64Str,
   Lang:   "en",
}

Other methods

Send / GetResult

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

id, err := client.Send(captchaToRequest())
if err != nil {
   log.Fatal(err);
}

time.Sleep(10 * time.Second)

code, err := client.GetResult(id)
if err != nil {
   log.Fatal(err);
}

if code == nil {
   log.Fatal("Not ready")
}

fmt.Println("code "+*code)

balance

^{API method description.}

Use this method to get your account's balance

balance, err := client.GetBalance()
if err != nil {
   log.Fatal(err);
}

report

^{API method description.}

Use this method to report good or bad captcha answer.

err := client.Report(id, true) // solved correctly
err := client.Report(id, false) // solved incorrectly

Error Handling

When using the SolveCaptcha API, it's important to handle errors properly to ensure smooth interaction with the service. Below is an example of error handling in the solvecaptcha-go library:

func main() {
	result, err := client.Text("If tomorrow is Saturday, what day is today?")
	if err != nil {
		switch e := err.(type) {
		case *api.ValidationException:
			// Invalid parameters passed
			log.Fatalf("Validation error: %v", e)
		case *api.NetworkException:
			// Network error occurred
			log.Fatalf("Network error: %v", e)
		case *api.ApiException:
			// API responded with an error
			log.Fatalf("API error: %v", e)
		case *api.TimeoutException:
			// CAPTCHA is not solved within the expected time
			log.Fatalf("Timeout error: %v", e)
		default:
			// Unknown error
			log.Fatalf("Unexpected error: %v", err)
		}
	}

	fmt.Printf("CAPTCHA solved! Result: %s\n", result.Text)
}

Proxies

You can pass your proxy as an additional argument for methods: recaptcha, funcaptcha, geetest, geetest v4, keycaptcha, capy puzzle, lemin, turnstile, amazon waf, CyberSiARA, DataDome, MTCaptcha and etc. The proxy will be forwarded to the API to solve the captcha.

Examples

Examples of solving all supported captcha types are located in the examples directory.

Get in touch

License

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

Name		Name	Last commit message	Last commit date
Latest commit History 7 Commits
examples		examples
CODE_OF_CONDUCT.md		CODE_OF_CONDUCT.md
CONTRIBUTING.md		CONTRIBUTING.md
LICENSE		LICENSE
README.md		README.md
apisolvecaptcha.go		apisolvecaptcha.go
go.mod		go.mod

License

solvercaptcha/solvecaptcha-go

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Go captcha solver: Bypass reCAPTCHA, Cloudflare, hCaptcha, Amazon and more

✅ Supported captcha solvers

🛠️ Features

📦 Use cases

Installation

Configuration

Client instance options

Solve captcha

Captcha options

Basic example

Normal Captcha

Text Captcha

reCAPTCHA v2

reCAPTCHA v3

reCAPTCHA Enterprise

hCaptcha

GeeTest

GeeTest V4

KeyCaptcha

Capy

Grid

Canvas

ClickCaptcha

Rotate

Amazon WAF

Cloudflare Turnstile

Lemin Cropped Captcha

CyberSiARA

DataDome

MTCaptcha

Yandex

Tencent

atbCAPTCHA

Cutcaptcha

Friendly Captcha

Audio Captcha

Other methods

Send / GetResult

balance

report

Error Handling

Proxies

Examples

Get in touch

License

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