How to setup Google reCAPTCHA

Open Google Cloud Console

https://console.cloud.google.com/

Create a project and open

Activate reCAPTCHA Enterprise

This is done / enabled under APIs and services.

Navigate to: Security > Recaptcha enterprise

Configure a site key in Google Cloud Console

Use checkbox challenge, and add at least one domain to your list

You should also store the LEGACY key if you want to call the API to verify the tokens:

Add reCAPTCHA HTML markup and javascript

Add reCAPTCHA field inside your form:

<form id="SignUp" data-message="Thank you, your form has been submitted.">
    <div class="form-group">
        <label>Email</label>
        <input class="form-control input-lg" name="Email" type="email" required>
    </div>
    <div class="form-group">
        <div class="g-recaptcha" id="captcha1" data-sitekey="ENTER-YOUR-SITE-KEY-HERE"></div>
    </div>
    <button class="btn btn-success btn-lg" type="submit">Sign up</button>
</form>

Remember to insert your site key where it says: "ENTER-YOUR-SITE-KEY-HERE"

Add script at the end of the page:

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

This example form looks like this:

Either pass the Google reCAPTCHA value or submit the form to your apropriate API end point (default input field name is "g-recaptcha-response")

Validate reCAPTCHA in API

In order to check that the reCAPTCHA was valid you must submit the result value and code a check of this value from an API function. Your API function will call the Google API to check the reCAPTCHA result.

#/API/Example.js

/* This code will check if supplied validation key is valid */
var googleUrl = "https://www.google.com/recaptcha/api/siteverify?response=" + form["g-recaptcha-response"] + "&secret=<ENTER-YOUR-LEGACY-SITE-KEY-HERE>";
var result = docly.httpPost(googleUrl, {});
if (!result.success) docly.assert("Google validation failed!"); /* It didn't validate and code will exit here */

/* It validated, enter the code below to proceed with your desired actions */ 

IMPORTANT!

You need to use the legacy key when calling this Google API. See image below.