How to Instantly Test Zapier & Make Webhook Catchers

The Nightmare of Blind Automations

Setting up webhooks on low-code platforms like Zapier or Make.com can be tricky. You configure a "Catch Hook" trigger, but to map the incoming data variables correctly to subsequent steps (like adding a row to Google Sheets or sending a Discord message), the platform needs to see sample data.

Often, generating this sample data natively requires real transactions—submitting a production form, processing a real Stripe order, or pushing actual code.

The Faster Approach: Manual Emulation

You don't need real transactions to trigger Webhook Catchers. You just need JSON.

If your target payload on a live app is supposed to look like:

{
  "customerName": "John Doe",
  "email": "john@example.com",
  "purchaseAmount": 55.00
}

You can just mock this data and manually fire it at the Webhook URL.

Using CosmoxHub to Speed up the Process

Instead of writing a Node and Axios script merely to hit an endpoint, leverage our CosmoxHub API Tester directly from your browser.

Step-by-Step

1. First, generate the Custom Webhook URL from Zapier or Make.
2. Open the CosmoxHub API Tester and set the request method drop-down to POST.
3. Paste your Webhook URL into the Endpoint URL bar.
4. Open the Body tab, select JSON, and paste your mocked payload.
5. Hit Send.

Inside your Zapier or Make dashboard, you should see the new data arrive instantly! You can now map out the rest of your automation logic flawlessly without relying on production systems.