DOCUMENTATION
v1.0
Once you have set up the webhooks, it's important to test that they are working correctly. To do this, you can use the TAGGRS webhook tester. This guide provides an overview of TAGGRS webhook tester to help you work more efficiently, see results quickly, and automate emails and other forms of communication.
Launch Preview mode in your GTM server container to simulate and monitor server-side events.
In the GTM interface, click the three dots in the top right to open the request previewer.
Copy the HTTP server preview header
Copy the HTTP server preview header code provided at the top of the request previewer.
Navigate to the Webhooks Tester within the TAGGRS dashboard under the test section.
1. Paste the copied HTTP server preview header into the input field of the Webhooks Tester and activate the tool.
2. When your webhook event fires in GTM, you’ll see the incoming request in the tester, allowing you to inspect and validate the payload
Always test webhooks after configuration or updates.
Use the tester to inspect JSON payloads and ensure correct parameter mapping.
Confirm that your webhook endpoints are secure and handle errors gracefully.
No data in tester Verify webhook URL and GTM trigger
Invalid payload Check header and JSON formatting
Event not firing Use GTM Preview mode and validate event setup
