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Roundtable Proof-of-Human continuously monitors user behavior throughout the session and can gate form submissions just like reCAPTCHA. This guide shows how to replace reCAPTCHA v3 with Roundtable. Both reCAPTCHA v3 and Roundtable Proof-of-Human provide a risk score, but they use opposite scales. reCAPTCHA scores range from 0.0 to 1.0 where higher scores indicate lower risk, while Roundtable scores range from 0 to 100 where higher scores indicate higher risk.

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Front-end changes

Replace your reCAPTCHA script with the Roundtable Proof-of-Human tracker and update your form submission to send the session ID instead of a token. You can copy the exact script tag with your site key from the Roundtable Dashboard.

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Before (reCAPTCHA v3)

<script src="https://www.google.com/recaptcha/api.js?render=YOUR_SITE_KEY"></script>

<script>
  document.getElementById('dummy-form').addEventListener('submit', function(e) {
    e.preventDefault();
    
    grecaptcha.ready(function() {
      grecaptcha.execute('YOUR_SITE_KEY', {action: 'submit'}).then(function(token) {
        const formData = new FormData(e.target);
        formData.append('recaptcha_token', token);
        
        fetch('/submit-form', {
          method: 'POST',
          body: formData
        });
      });
    });
  });
</script>

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After (Roundtable Proof-of-Human)

<script 
  src="https://cdn.roundtable.ai/v1/rt.js" 
  data-site-key="YOUR_SITE_KEY">
</script>

<script>
  document.getElementById('dummy-form').addEventListener('submit', function(e) {
    e.preventDefault();
    
    const sessionId = window.getRoundtableSessionId();
    const formData = new FormData(e.target);
    formData.append('roundtable_session_id', sessionId);
    
    fetch('/submit-form', {
      method: 'POST',
      body: formData
    });
  });
</script>

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Back-end changes

Replace your reCAPTCHA verification with a call to the Roundtable Proof-of-Human API. We recommend starting by blocking submissions with a risk score of 70 or higher. You’ll need your secret key from the Dashboard for API authentication.

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Before (reCAPTCHA v3)

import requests

def verify_recaptcha(token, user_ip):
    response = requests.post('https://www.google.com/recaptcha/api/siteverify', data={
        'secret': 'YOUR_SECRET_KEY',
        'response': token,
        'remoteip': user_ip
    })
    
    result = response.json()
    return result['success'] and result['score'] >= 0.5

# In your form handler
recaptcha_token = request.form.get('recaptcha_token')
if verify_recaptcha(recaptcha_token, request.remote_addr):
    # Process form
else:
    return "Blocked", 403

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After (Roundtable Proof-of-Human)

import requests

def verify_roundtable(session_id):
    response = requests.get(
        f'https://api.roundtable.ai/v1/sessions/{session_id}/report',
        headers={'Authorization': f'Bearer YOUR_SECRET_KEY'}
    )
    
    if response.status_code == 200:
        result = response.json()
        return result['risk_score'] < 70  # Block scores >= 70
    return False

# In your form handler
session_id = request.form.get('roundtable_session_id')
if verify_roundtable(session_id):
    # Process form
else:
    return "Blocked", 403

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Moving beyond reCAPTCHA

Roundtable Proof-of-Human lets you easily replicate reCAPTCHA’s form gating, but you can also do more. Unlike reCAPTCHA’s single risk score, Roundtable provides detailed biometric checks and device flags for full visibility into session risk. You can use these individual flags to create sophisticated blocking rules beyond the risk score and gain insights into your users.