Step 1: Sign Up

First, you'll need to  sign up for an API key pair for your site.The key pair consists of a site key and secret. The secret authorizes communication between your application backend and the reCAPTCHA server to verify the user's response. The secret needs to be kept safe for security purposes.

The API key pair is unique to the domains and first-level subdomains that you specify. Specifying more than one domain could come in handy if you serve your website from multiple top-level domains.

For example, if you specify the API key pair to yoursite.com, the following table shows whether or not reCAPTCHA will work for the domain and its subdomain variations. If you specify other domain names or TLDs (for example: anothersite.com, yoursite.net), the same reCAPTCHA conditions apply.

Choose reCAPTCHA V2:

*ActiveDEMAND also supports reCAPTCHA V3. Please follow the article on reCAPTCHA V3 for instructions in case you would like to use it instead of V2.
Recaptcha V3 

Click on your account settings, scroll down, and select the integrations tab. Fill in the Google Captcha Fields

Step 3: Add the ReCaptcha form field to your form

Open your landing page form, or web form in ActiveDEMAND. You will now see a Google 

Step 4: If you are using a webform, include Google's script

The following script needs to be added to the webpage that your exported form is embedded on.

<script src="https://www.google.com/recaptcha/api.js" async defer></script>