How to Identify reCAPTCHA Version (v2 vs Enterprise)

Different reCAPTCHA versions require different CaptchaAI parameters. Sending the wrong version wastes time and API calls. This guide shows you how to identify the exact version in under 60 seconds by checking four things in the page source.

Quick detection flowchart

Detection steps

1. Check for a visible checkbox

If you see the "I'm not a robot" checkbox, it is reCAPTCHA v2 Standard. Open DevTools and confirm:

<div class="g-recaptcha" data-sitekey="6Le-wvkSAAAAAN..."></div>

2. Check the script tag

Right-click → View Source and search for recaptcha:

<!-- Standard v2 or v3 -->
<script src="https://www.google.com/recaptcha/api.js"></script>
<script src="https://www.google.com/recaptcha/api.js?render=SITEKEY"></script>

<!-- Enterprise v2 or v3 -->
<script src="https://www.google.com/recaptcha/enterprise.js"></script>
<script src="https://www.google.com/recaptcha/enterprise.js?render=SITEKEY"></script>

• api.js → Standard
• enterprise.js → Enterprise
• ?render=SITEKEY → v3 (score-based)
• No render parameter → v2 (checkbox or invisible)

3. Check for invisible mode

Search for data-size="invisible":

<div class="g-recaptcha" data-sitekey="..." data-size="invisible" data-callback="onSubmit"></div>

Or look for a button with data-sitekey:

<button data-sitekey="..." data-callback="onSubmit">Submit</button>

4. Check JavaScript execution

Open the browser console and run:

// Check which object exists:
console.log('grecaptcha:', typeof grecaptcha);
console.log('enterprise:', typeof grecaptcha?.enterprise);

// Standard: grecaptcha exists, enterprise is undefined
// Enterprise: grecaptcha.enterprise exists

// Check for v3 execute calls:
// Look in source for: grecaptcha.execute('SITEKEY', {action: '...'})
// or: grecaptcha.enterprise.execute('SITEKEY', {action: '...'})

Detection with code

import requests
from bs4 import BeautifulSoup

def detect_recaptcha_version(url):
    response = requests.get(url, headers={"User-Agent": "Mozilla/5.0"})
    html = response.text

    version = {"type": None, "enterprise": False, "sitekey": None}

    # Check for Enterprise
    if "recaptcha/enterprise.js" in html:
        version["enterprise"] = True

    # Check for v3 (render parameter)
    if "render=" in html and "recaptcha" in html:
        version["type"] = "v3"

    # Check for visible checkbox
    soup = BeautifulSoup(html, "html.parser")
    recaptcha_div = soup.find("div", class_="g-recaptcha")

    if recaptcha_div:
        version["sitekey"] = recaptcha_div.get("data-sitekey")
        if recaptcha_div.get("data-size") == "invisible":
            version["type"] = "v2_invisible"
        elif not version["type"]:
            version["type"] = "v2_standard"

    # Check buttons with data-sitekey
    btn = soup.find(attrs={"data-sitekey": True})
    if btn and btn.name == "button":
        version["type"] = "v2_invisible"
        version["sitekey"] = btn.get("data-sitekey")

    return version

result = detect_recaptcha_version("https://example.com")
print(result)
# {'type': 'v2_standard', 'enterprise': False, 'sitekey': '6Le-wvkSAAAAAN...'}

CaptchaAI parameters by version

FAQ

How can I tell v2 from v3 without seeing the source code?

If there is a visible checkbox or image challenge, it is v2. If there is no visible widget but you see a reCAPTCHA badge in the bottom-right corner, it is likely v3.

What if a site uses both v2 and v3?

Some sites load v3 on every page for analytics and show v2 on specific forms. Check the specific page where your automation needs to pass.

Does the detection method change for Enterprise?

Only the script tag changes (enterprise.js vs api.js). The visible behavior is the same.

How do I detect reCAPTCHA in a single-page app (SPA)?

SPAs load reCAPTCHA dynamically. Use browser DevTools Network tab to watch for requests to google.com/recaptcha/.

What if I use the wrong version parameter?

The token may be generated but rejected by the target site's backend. Always verify the version before calling the API.

Next steps

Once you have identified the version, follow the matching guide:

• How to Solve reCAPTCHA v2 Using API
• How to Solve reCAPTCHA Invisible Using API
• How to Solve reCAPTCHA v3 Using API
• How to Identify reCAPTCHA Enterprise Implementation

Ready to solve CAPTCHAs? Get your CaptchaAI API key and start integrating today.

Related Articles

• How To Solve Recaptcha V2 Callback Using Api
• Recaptcha V2 Turnstile Same Site Handling
• Recaptcha V3 Enterprise Vs Standard