The Postman collection to examine and test potential Meraki alerts via webhooks has been updated.
Use this developer collection while testing your solution by simply changing the {{webhook-url}} variable with your own webhook receiver address.
Postman Collection
FYI, for really quick tests, you can use this simple online tool to capture a webhook and inspect the network flow/data.
https://webhook.site
(disclaimer, I just found the webhook testing tool via a Google search... so use at your own risk)
Cheers!