How to Solve reCAPTCHA v2 Enterprise with Node.js

reCAPTCHA v2 Enterprise adds enterprise-grade risk scoring to the standard "I'm not a robot" checkbox. The widget looks the same as standard v2, but tokens are verified through Google's Enterprise backend with stricter validation. To solve it with CaptchaAI, add enterprise=1 to your v2 request.

This guide covers the complete Node.js implementation — detecting Enterprise v2, submitting to CaptchaAI, polling for the result, and injecting the token.

What you need

Step 1: Identify reCAPTCHA v2 Enterprise

Open DevTools and look for the Enterprise anchor request in the Network tab:

https://www.google.com/recaptcha/enterprise/anchor?ar=1&k=6LdxxXXxAAAAAAcX...&sa=LOGIN&...

Key indicators:

• Script source includes /recaptcha/enterprise.js or /enterprise/anchor
• The k= parameter is the sitekey
• The sa= parameter (if present) is the action

Standard v2 uses /recaptcha/api2/anchor — do not add enterprise=1 for standard v2.

Step 2: Submit the task to CaptchaAI

const API_KEY = "YOUR_API_KEY";

async function submitTask(sitekey, pageurl, action) {
  const params = new URLSearchParams({
    key: API_KEY,
    method: "userrecaptcha",
    googlekey: sitekey,
    pageurl: pageurl,
    enterprise: "1",
    json: "1",
  });

  if (action) {
    params.set("action", action);
  }

  const response = await fetch(
    `https://ocr.captchaai.com/in.php?${params}`
  );
  const data = await response.json();

  if (data.status !== 1) {
    throw new Error(`Submit failed: ${data.request}`);
  }

  console.log(`Task submitted. ID: ${data.request}`);
  return data.request;
}

Step 3: Poll for the result

Wait 20 seconds before the first poll, then check every 5 seconds:

function delay(ms) {
  return new Promise((resolve) => setTimeout(resolve, ms));
}

async function pollResult(taskId) {
  await delay(20000);

  for (let attempt = 0; attempt < 30; attempt++) {
    const params = new URLSearchParams({
      key: API_KEY,
      action: "get",
      id: taskId,
      json: "1",
    });

    const response = await fetch(
      `https://ocr.captchaai.com/res.php?${params}`
    );
    const data = await response.json();

    if (data.status === 1) {
      console.log(`Solved. Token: ${data.request.substring(0, 60)}...`);
      return {
        token: data.request,
        userAgent: data.user_agent || "",
      };
    }

    if (data.request !== "CAPCHA_NOT_READY") {
      throw new Error(`Solve failed: ${data.request}`);
    }

    console.log(`Attempt ${attempt + 1}: not ready, waiting 5s...`);
    await delay(5000);
  }

  throw new Error("Solve timed out");
}

Step 4: Inject the token

Submit the solved token as g-recaptcha-response. If the API returned a user_agent, use it in your request headers:

async function submitForm(token, userAgent) {
  const headers = { "Content-Type": "application/x-www-form-urlencoded" };

  if (userAgent) {
    headers["User-Agent"] = userAgent;
  }

  const response = await fetch("https://example.com/api/login", {
    method: "POST",
    headers,
    body: new URLSearchParams({
      username: "user",
      password: "pass",
      "g-recaptcha-response": token,
    }),
  });

  console.log(`Response status: ${response.status}`);
  return response;
}

Complete working script

const API_KEY = "YOUR_API_KEY";
const SITE_KEY = "6LdxxXXxAAAAAAcXxxXxxX91xxxxxxxx8xxOx7A";
const PAGE_URL = "https://example.com/login";
const ACTION = "LOGIN"; // optional — omit if not in anchor URL

function delay(ms) {
  return new Promise((resolve) => setTimeout(resolve, ms));
}

async function solveRecaptchaV2Enterprise() {
  // Submit task
  const submitParams = new URLSearchParams({
    key: API_KEY,
    method: "userrecaptcha",
    googlekey: SITE_KEY,
    pageurl: PAGE_URL,
    enterprise: "1",
    action: ACTION,
    json: "1",
  });

  const submitRes = await fetch(
    `https://ocr.captchaai.com/in.php?${submitParams}`
  );
  const submitData = await submitRes.json();

  if (submitData.status !== 1) {
    throw new Error(`Submit error: ${submitData.request}`);
  }

  const taskId = submitData.request;
  console.log(`Task ID: ${taskId}`);

  // Poll for result
  await delay(20000);

  for (let i = 0; i < 30; i++) {
    const pollParams = new URLSearchParams({
      key: API_KEY,
      action: "get",
      id: taskId,
      json: "1",
    });

    const pollRes = await fetch(
      `https://ocr.captchaai.com/res.php?${pollParams}`
    );
    const pollData = await pollRes.json();

    if (pollData.status === 1) {
      return {
        token: pollData.request,
        userAgent: pollData.user_agent || "",
      };
    }

    if (pollData.request !== "CAPCHA_NOT_READY") {
      throw new Error(`Solve error: ${pollData.request}`);
    }

    await delay(5000);
  }

  throw new Error("Solve timed out");
}

(async () => {
  const { token, userAgent } = await solveRecaptchaV2Enterprise();
  console.log(`Token: ${token.substring(0, 60)}...`);
  if (userAgent) console.log(`User-Agent: ${userAgent}`);
})();

Expected output:

Task ID: 73849562810
Token: 03AGdBq24PBCqLmOx2V4pGHJjkR2xZ1r...
User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64)...

Troubleshooting

FAQ

How do I detect Enterprise v2 vs standard v2?

Enterprise v2 loads from /recaptcha/enterprise/ in the script or anchor URL. Standard v2 uses /recaptcha/api2/.

Is the action parameter required?

Only if the anchor URL includes sa=. If absent, omit it from your CaptchaAI request.

Why does the target site reject my token?

Most commonly: User-Agent mismatch. Enterprise v2 tokens are bound to the solver's User-Agent. Always use the user_agent value returned in the poll response.

Can I use this with Puppeteer or Playwright?

Yes. Extract the sitekey from the page, solve via the API, then inject the token into document.getElementById('g-recaptcha-response').innerHTML.

What is the typical solve time?

15–30 seconds depending on server load.

Start solving reCAPTCHA v2 Enterprise

Get your API key at captchaai.com and add enterprise=1 to your v2 requests.

Related guides

• How to Solve reCAPTCHA v2 Enterprise Using API
• Solve reCAPTCHA v2 Enterprise with Python
• Common reCAPTCHA v2 Enterprise Errors and Fixes
• How to Identify reCAPTCHA Enterprise Implementation