Webhook & Zoom Automation Fix

Project: Fix Avangate (2Checkout) → Make.com Webhook + Zoom Webinar Automation

Overview
I am trying to connect Avangate (2Checkout) IPN notifications to a Make.com (Integromat) webhook, but no data is being received in Make when test orders are executed.

The webhook is correctly created in Make and added in Avangate IPN settings, but when running a test order and activating “Run once” in Make, nothing is captured.

End Goal (Important)

When someone registers for a course:

1. Payment is processed via Avangate (2Checkout)
2. After successful payment:

The user (subscriber) must be checked in Zoom Webinar
If the subscriber is not yet registered → add them to the webinar
If already registered → do nothing (avoid duplicates)

This full flow needs to be automated via Make.com

Current Setup

Platform: Avangate / 2Checkout
Automation tool: Make.com
Webhook: Custom webhook created in Make
IPN URL added in Avangate
Hashing algorithms: SHA3 (also tested with md5/sha2/sha3)

Triggers enabled:
Authorized and approved orders (after delivery)

Test orders are executed via Avangate debug tool

Problem

Webhook in Make shows no incoming data
“Run once” remains waiting indefinitely
Avangate indicates request is processed, but no payload reaches Make

What I Need

I need someone to:

1. Diagnose why Avangate IPN is not reaching the Make webhook
2. Verify correct IPN configuration (triggers, endpoints, hashing, test vs live behavior)
3. Ensure webhook receives payload correctly in Make
4. Build the automation flow in Make:

* Receive IPN data
* Extract customer info (email, name)
* Check if user already exists in Zoom webinar
* Add user to Zoom webinar if not present
5. Test the full flow end-to-end

Access / Info Provided

Access to Make scenario
Avangate IPN settings
Webhook URL
Zoom webinar ID
Debug/test tools inside Avangate

Expected Outcome

Webhook successfully receives IPN data from Avangate
Fully working automation:

* Payment → webhook → Zoom webinar registration
* No duplicate webinar registrations
* Confirmed working with a test order
* Clear explanation of what was wrong and how it was fixed

Nice to Have

Experience with:

* 2Checkout / Avangate IPN
* Make.com (Integromat)
* Zoom API / webinar integrations
* Webhooks & payment integrations

Notes
This is mainly a configuration + integration task (not from scratch). Should be straightforward for someone experienced with webhooks and Make.

Please include:

Relevant experience
Estimated time to start/ to complete
Any questions or suggested improvements