Captcha Solver API JavaScript Examples

Runnable examples prepared for the official Captcha Solver JavaScript SDK.

The JavaScript SDK is not published yet. Until it is available from npm, keep its repository next to this project and install it locally.

Installation before SDK publication

Expected directories:

Work/
  javascript-examples/
  SDK/javascript-skd/

git clone https://github.com/captcha-solver-api/javascript-examples.git
cd javascript-examples
npm install
npm install --no-save ../SDK/javascript-skd

After the SDK is published, the local installation command will be replaced with:

npm install captcha-sdk

Set the API key in .env:

CAPTCHA_API_KEY=your_api_key

Run examples

node examples/recaptcha_v2.js
node examples/turnstile.js
node examples/image_to_text.js
node examples/coordinates.js
node examples/balance.js

Replace placeholder URLs, site keys, application IDs, dynamic values, and proxy credentials before running token captcha examples. GeeTest v3 requires a fresh challenge value for every request.

Image examples use files from assets/.

Included examples

File	Task
recaptcha_v2.js	reCAPTCHA v2, proxyless and proxy
recaptcha_v2_enterprise.js	reCAPTCHA v2 Enterprise, proxyless and proxy
recaptcha_v3.js	reCAPTCHA v3 proxyless
turnstile.js	Cloudflare Turnstile, proxyless and proxy
yandex_smartcaptcha.js	Yandex SmartCaptcha token, proxyless and proxy
yandex_smartcaptcha_image.js	Yandex SmartCaptcha image mode
image_to_text.js	Image to Text
coordinates.js	Click coordinates
geetest_v3.js	GeeTest v3, proxyless and proxy
geetest_v4.js	GeeTest v4, proxyless and proxy
tencent.js	Tencent, proxyless and proxy
balance.js	Account balance

Each example creates a task through Tasks and calls CaptchaClient.solve(). Polling and API errors are handled by the SDK.

Requirements

• Node.js 18+
• Local JavaScript SDK until npm publication
• Captcha Solver account and API key

API documentation: https://captcha-solver.com/en/docs/captcha-types

License

MIT. See LICENSE.md.