Instapage Email Verification Integration

Use JS Widget to quickly and easily integrate DeBounce real-time email validation to your Instapage fields.


JS Widget can easily integrate to your Instapage forms and validate your emails prior submitting the forms.

What do you need before starting?

  1. DeBounce public API key
  2. Instapage account
  3. A Instapage page including a form. Click here if you do not know how to create a Instapage page/form.

Here is the step by step guide how to integrate DeBounce into your Instapage forms.

Creating public API key

Navigate to and create an API key. Then copy the the public API key.

Then, you need to add your domain URL into approved domains list. This is a security factor which enables the widget only on your domain. Click on "CORS Domains" and add your website address. Please note that the CORS URL must follow these rules: 1) It is not sensitive to http and https 2) It is sensitive to www and non www 3) If your webpage is on a subdomain, you must add subdomain too 4) Enter the root URL of your webpage. Some approved examples:,,

Adding Public API into JavaScript Code

Add your public API key into the following code. Now, the integration code is ready. You only need to add it to your Instapage page.

<script type="text/javascript">
DeBounce_BlockFreeEmails = 'false'; //Set this value true to block free emails like Gmail.
<script async type="text/javascript" src=""></script>

Insert the JavaScript Widget into Instapage

From your Instapage, go to Settings -> Javascript.

In the Body section, paste the DeBounce HTML snippet from the last section and Save the page. You should now see the DeBounce JavaScript widget working its magic when you start typing in these fields.

P.S: The JavaScript widget will only validate emails on the preview or live version of the Instapage, not from the editor screen.