capmonster

CapMonster Cloud

CapMonster Cloud is an AI-based CAPTCHA solver. Unlike 2Captcha (human workers), CapMonster uses trained models, which makes it faster (10-30s) and cheaper ($0.60/1K for reCAPTCHA v2) but slightly less reliable on novel challenge variants.

Use this skill when:

• You need to solve the same CAPTCHA types as 2Captcha, but want lower cost
• You're scraping at volume (>10K solves) where $0.40/1K savings matter
• You need cf_clearance cookies for Cloudflare Challenge pages (CapMonster has a dedicated task type for this)
• 2Captcha returns ERROR_CAPTCHA_UNSOLVABLE — try CapMonster as fallback

For the 2Captcha equivalent, see 2captcha. The task shape is similar but the client API is different.

Installation

Two npm packages exist. Prefer the official ZennoLab client:

# Official — maintained by capmonster.cloud
npm install @zennolab_com/capmonstercloud-client

# Community alternative — node-capmonster — only use if you need TypeScript types or features not in the official client
npm install node-capmonster

Examples below use the official client.

Setup

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

const client = CapMonsterCloudClientFactory.Create(
  new ClientOptions({ clientKey: process.env.CAPMONSTER_API_KEY })
);

Read the key from process.env.CAPMONSTER_API_KEY — torch loads .env automatically.

Check balance

const balance = await client.getBalance();
console.log(`CapMonster balance: $${balance}`);

Pay-per-success billing: you're only charged for tasks that returned a valid token.

Cloudflare Turnstile

Simple Turnstile (no proxy)

import { TurnstileRequest } from "@zennolab_com/capmonstercloud-client";

const req = new TurnstileRequest({
  websiteURL: "https://example.com/login",
  websiteKey: "0x4AAAAAAABUYP0XeMJF0xoy",
});

const res = await client.Solve(req);
const token = res.solution.token;

// Inject into the hidden field
await page.evaluate((t) => {
  document.querySelector('input[name="cf-turnstile-response"]').value = t;
}, token);