If you're building bots, automation flows, or just trying to test form submissions protected by reCAPTCHA, you've probably realized this: knowing how to solve a reCAPTCHA isn’t enough — you also need to know what to send to the CAPTCHA-solving API.

That’s where this post comes in. We’re going to walk through the 3 key parameters required to solve reCAPTCHA v2 or v3 challenges using CaptchaAI, and more importantly — how to find them on any site.

Whether you're automating a login flow, signup page, or any form using reCAPTCHA, this guide will save you time and frustration.

 

🔍 What You Need to Solve reCAPTCHA

To solve a reCAPTCHA task with CaptchaAI, you’ll need three main parameters:

1. Sitekey – The public key that tells Google to show a CAPTCHA
    
2. Page URL – The full URL of the page where the CAPTCHA appears
    
3. Action (optional for v3) – The "action name" if you're solving reCAPTCHA v3
    

Let’s break each one down and show you how to find them.

 

🔑 1. Finding the Sitekey

The sitekey is the public identifier used by reCAPTCHA to display challenges. Every website that uses reCAPTCHA has one — and it’s usually easy to find.

🔧 How to Find It

1. Go to the page where the CAPTCHA is shown
    
2. Open Developer Tools in your browser (right-click > Inspect or Ctrl+Shift+I)
    
3. Search for data-sitekey
    

You’ll find something like this:

 

✅ Copy the data-sitekey value. You’ll send this to CaptchaAI.

 

🌐 2. Grabbing the Page URL

The second parameter is straightforward — it’s just the full URL of the page where the CAPTCHA appears.

Examples:

• https://example.com/login
   
• https://signup.example.com/register
   

🔁 If the CAPTCHA loads inside an iframe, make sure to grab the URL where the actual form is submitted, not the iframe src.

🧭 3. Finding the Action Parameter (Only for reCAPTCHA v3)

For reCAPTCHA v3, there’s an optional — but important — parameter called action. This is usually defined in the website’s JavaScript when reCAPTCHA is initialized.

🔍 How to Find the Action

1. In DevTools, search for grecaptcha.execute
    
2. You’ll likely find a line like:

grecaptcha.execute('6Lc_example_key', { action: 'login' })

 

✔️ That string 'login' is your action value.

If you're unsure, try defaulting to "homepage" — many sites use it.

 

🚀 Putting It All Together with CaptchaAI

Once you have all the parameters, solving the CAPTCHA is simple.

🧪 Example API Call (reCAPTCHA v2 / Invisible):

 

import requests

payload = {

    "apikey": "your_captchaai_api_key",

    "sitekey": "6Lc_example_key",

    "pageurl": "https://example.com/login"}

response = requests.post("https://captchaai.com/api/solve", json=payload)

print("Token:", response.json().get("solution"))

 

🧪 Example API Call (reCAPTCHA v3):

payload = {

    "apikey": "your_captchaai_api_key",

    "sitekey": "6Lc_example_key",

    "pageurl": "https://example.com/login",

    "action": "login"}

CaptchaAI will return a valid reCAPTCHA token, which you can inject into the form (usually in a hidden input field named g-recaptcha-response) before submitting it.

 

🧠 Pro Tips

• Always double-check that the sitekey matches the current URL.
   
• The token you get usually expires in 90–120 seconds — submit your form quickly.
   
• If the site uses a proxy iframe, open that URL separately and inspect it too.

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🛡️ Legal & Ethical Reminder

Bypassing CAPTCHAs is a powerful tool — but use it responsibly. Make sure your automation respects the terms of service of any website you're working with.

CaptchaAI is best used for:

• QA testing
   
• Form submission automation
   
• Bot development for ethical scraping
   
• UX flow automation

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✅ Conclusion

Solving reCAPTCHA with CaptchaAI is only difficult if you don’t know what to look for. But now you do.

With just three parameters — sitekey, page URL, and optional action — you can integrate powerful CAPTCHA-solving directly into your automation stack.

🔗 Start solving CAPTCHAs today with CaptchaAI: https://captchaai.co