Instapage Email Verification Integration

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


JS Widget can easily integrate into your Instapage forms and validate your emails prior to form submission.

What do you need before starting?

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

Here is a step-by-step guide on how to integrate DeBounce into your Instapage forms.

Creating a public API key

Navigate to and create an API key, then copy the public API key.

Next, you need to add your domain URL to the approved domains list. This is a security factor that only enables the widget on your specific 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 the subdomain too; 4) You must enter the root URL of your webpage. Some possible examples:,,

Adding Public API into JavaScript Code

Add your public API key into the following code. The integration code is now 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.

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

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