Help implementing a Custom Coded Workflow Action to call ZeroBounce for real-time email validation (

Develop, Build & Integrate APIs & Integrations
1

Hi folks,

We’re trying to validate form submissions at workflow time using ZeroBounce, so only clean contacts proceed to our follow-up steps.

Context & goal

  • We use HubSpot forms (Contact Us, Get Demo). Native anti-spam is on (CAPTCHA, domain blocks, honeypot + post-submission filters). Persistent spam still slips in via obfuscated free-mail domains.

  • We have a paid ZeroBounce account and want to validate each email as the contact enters the workflow and then route:

    • Valid / safe → continue the workflow (send autoresponder, assign owner, etc.)
    • Invalid / disposable / toxic / spam-trap / undeliverable → set quarantine flags, add to a static list, and halt marketing emails.

If someone has used the ZeroBounce marketplace app for real-time validation on HubSpot forms (not just list scrubbing)? Need your help

2

Hey @OSari1 - thanks for posting in the Community!
I’d like to tag in some coding experts here to see what may be possible!
@derekcavaliero, @JTBuys, and @ChristinaKay - any thoughts here?
Shane, Community Manager

3

@OSari1, based on the ZeroBounce documentation, this may be possible without any custom coding. I would start with the steps below. If that doesn’t work, then it may be necessary to validate through a custom coded action using the API.

  1. Create an active segment (list) of contacts that have filled out any form you want to validate.
  2. Configure a new validation in ZeroBounce using the new segment and toggle on Auto Validation
  3. Create a workflow to manage contacts with failed validation (i.e. Invalid / disposable / toxic / spam-trap / undeliverable → set quarantine flags, add to a static list, and halt marketing emails)
  4. Add enrollment filter criteria to your workflows for contacts that have a valid ZeroBounce result. Also add unenrollment criteria for invalid ZeroBounce results (in the event that an email becomes undelierable.)