We just enhanced the capabilities of our webhook alerts. Our new design is now closer to the configuration of our API checks:
1. You can now choose any of the common HTTP methods. The default value will be set to POST.
2. You can now set headers for your webhooks. Just like the API checks, we provide encrypted values, templated values and plain text values.
3. You can also add query parameters. The parameters could already be set as part of the URL in the past already, but now parameters can be added as structured key/values.
If you're already using query parameters as part the URL, the extra items in the tab section won't suppress them but will be added to them.