CapMonster Cloud Node.js SDK: TypeScript CAPTCHA Solver & Anti-Bot API Client

Official Node.js and TypeScript SDK for automated CAPTCHA solving in web scraping, browser automation, and testing workflows.

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Official JavaScript and TypeScript client library for CapMonster Cloud. Add automated CAPTCHA-solving tasks to Node.js, TypeScript, Puppeteer, Playwright, Cypress, and HTTP-based workflows.

Use the SDK with supported CAPTCHA and anti-bot task types, including reCAPTCHA v2/v3/Enterprise, Cloudflare Turnstile, GeeTest, DataDome, Amazon WAF, Imperva, and image-to-text tasks.

👉 Get your Free API Key & Free Trial Balance on CapMonster Cloud

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⚡ Highlights

• ⚡ Node.js & TypeScript: Typed request models for supported task types.
• 🧩 Modern CAPTCHA coverage: Work with reCAPTCHA, Turnstile, GeeTest, Amazon WAF, DataDome, Imperva, and more.
• 🌐 Automation-ready: Use with Playwright, Puppeteer, Cypress, scraping tools, and custom HTTP clients.
• 🛠️ Dedicated or custom payloads: Use request classes or CommonCaptcha to submit a full task payload.
• 📖 Official docs: Current task parameters and API methods are maintained in CapMonster Cloud documentation.

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📦 Installation

Install the package from npm:

npm install @zennolab_com/capmonstercloud-client

The package published on npm already includes the compiled files and is ready to use after installation.

Build from this repository

Git does not contain the compiled dist output. The examples below import @zennolab_com/capmonstercloud-client, and inside this repository that name points at dist. After cloning, install dependencies and build before running an example or a test:

npm install
npm run build

Run npm run build again after changing the source.

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🚀 Quick Start

Create an API key in the CapMonster Cloud Dashboard, install the package, then use one of the examples below.

1. Solve reCAPTCHA v2 (TypeScript)

import {
  CapMonsterCloudClientFactory,
  ClientOptions,
  RecaptchaV2Request,
} from '@zennolab_com/capmonstercloud-client';

const client = CapMonsterCloudClientFactory.Create(
  new ClientOptions({ clientKey: 'YOUR_API_KEY' }),
);

const result = await client.Solve(
  new RecaptchaV2Request({
    websiteURL: 'https://lessons.zennolab.com/captchas/recaptcha/v2_simple.php?level=high',
    websiteKey: '6Lcg7CMUAAAAANphynKgn9YAgA4tQ2KI_iqRyTwd',
  }),
);

console.log(result.solution);

2. Solve Cloudflare Turnstile (TypeScript)

import {
  CapMonsterCloudClientFactory,
  ClientOptions,
  TurnstileRequest,
} from '@zennolab_com/capmonstercloud-client';

const client = CapMonsterCloudClientFactory.Create(
  new ClientOptions({ clientKey: 'YOUR_API_KEY' }),
);

const result = await client.Solve(
  new TurnstileRequest({
    websiteURL: 'https://tsinvisble.zlsupport.com',
    websiteKey: '0x4AAAAAAABUY0VLtOUMAHxE',
  }),
);

console.log(result.solution);

3. CommonJS Example and Balance Check

const {
  CapMonsterCloudClientFactory,
  ClientOptions,
  RecaptchaV2Request,
} = require('@zennolab_com/capmonstercloud-client');

async function run() {
  const client = CapMonsterCloudClientFactory.Create(
    new ClientOptions({ clientKey: 'YOUR_API_KEY' }),
  );

  console.log('Balance:', await client.getBalance());

  const task = new RecaptchaV2Request({
    websiteURL: 'https://lessons.zennolab.com/captchas/recaptcha/v2_simple.php?level=high',
    websiteKey: '6Lcg7CMUAAAAANphynKgn9YAgA4tQ2KI_iqRyTwd',
  });

  const result = await client.Solve(task);
  console.log(result.solution);
}

run().catch(console.error);

4. Submit a Custom Payload with CommonCaptcha

Use CommonCaptcha when you need to provide a complete task payload directly.

const {
  CapMonsterCloudClientFactory,
  ClientOptions,
  CommonCaptcha,
} = require('@zennolab_com/capmonstercloud-client');

async function run() {
  const client = CapMonsterCloudClientFactory.Create(
    new ClientOptions({ clientKey: 'YOUR_API_KEY' }),
  );

  const task = new CommonCaptcha({
    task: {
      type: 'RecaptchaV2Task',
      websiteURL: 'https://lessons.zennolab.com/captchas/recaptcha/v2_simple.php?level=high',
      websiteKey: '6Lcg7CMUAAAAANphynKgn9YAgA4tQ2KI_iqRyTwd',
    },
  });

  console.log(await client.Solve(task));
}

run().catch(console.error);

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🛡️ Supported Task Families

Refer to the official Supported CAPTCHA Types for current task parameters, response formats, and examples.

Task family	Example request classes in this SDK
reCAPTCHA	RecaptchaV2Request, RecaptchaV2EnterpriseRequest, RecaptchaV3ProxylessRequest
Cloudflare Turnstile	TurnstileRequest
GeeTest	GeeTestRequest
Amazon WAF	AmazonRequest, AmazonProxylessRequest
Image-to-Text	ImageToTextRequest
Complex image tasks	ComplexImageRecaptchaRequest, ComplexImageTaskRecognitionRequest
Custom anti-bot tasks	DataDomeRequest, ImpervaRequest, TenDIRequest, ProsopoRequest, BasiliskRequest

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🌐 Browser Use

The package can also be bundled for browser use. Browser implementations use native fetch, so use a compatible module bundler such as Webpack when integrating it into a frontend build.

Keep API keys private. Do not expose production CapMonster Cloud API keys in public frontend code.

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🐛 Debugging

Set the DEBUG environment variable to enable the package logger:

DEBUG=cmc-* node app.js

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🛠️ How It Works

[ Node.js Script / Browser Automation ]
                    │
                    ▼
      [ Create task request with target data ]
                    │
                    ▼
[ CapMonster Cloud Node.js SDK ] ──► createTask API request
                    │
                    ▼
       [ SDK waits for the task result ]
                    │
                    ▼
[ Receive token / solution ] ──► Use it in your workflow

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⚙️ Best Practices

• Use the right task model: Choose a request type that matches the target protection; validate all required fields against the official documentation.
• Keep session context consistent: For tasks that use a proxy, align the proxy settings with the associated browser or scraping session.
• Use tokens promptly: CAPTCHA tokens can expire, so submit or inject the returned solution immediately.
• Monitor balance and API responses: See the API methods reference for createTask, getTaskResult, and getBalance.

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📚 Documentation & Support

• 📖 Getting Started
• 🧩 Supported CAPTCHA Types
• ⚙️ API Methods: createTask, getTaskResult, getBalance
• 🌐 Browser Extension Guides
• 💬 CapMonster Cloud

Other official SDKs

• Python
• .NET
• n8n
• API Docs

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📄 License

MIT © ZennoLab / CapMonster Cloud