

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.
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:strongPassword@123.123.123.123:3128",
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.