webhook alert enhancements#308

The “webhook” alert contact is a very nice and flexible feature.
But two things are missing which would easily make it even better:

1. Headers / http-basic auth : These can’t be set for that webhook URL, and that’s problem because some (many) 3rd party may depend upon a particular token/header (bearer) being set.
   (It’s the case for GitLab integration or Zoom message webhook, for example)

2. Payload placeholders : Would be definitely great to have things like ‘%(time)’ or
   ‘%(hostname)’ available in the payload field so they get replaced dynamically when the webhook is sent.
   Ideally:
   %(start_time) # For up alert
   %(end_time) # For down alert
   %(id) # Constant between a corresponding couple of “up” and “down” alerts

And probe-related variabls

%(title)
%(url)
%(keyword)

I hope this could be included in a future iteration (in the free plan?) so that users
imagination is the only limit.

The option to add header parameter is perfect. Any system today require some header token or auth.

What about the ability to merge alerts together or supress repeats? For example I want to call an API to create an incident in Freshstatus but if a second alert occurs for a machine in the same DC, I don’t want to create another incident.

Having the option append not to append the default variable to query string. Some third party have issue with it.

Any improvements on this

Bump - without headers it makes it very hard to integrate

We also need custom headers or at least the ability to set a bearer token for webhooks. Otherwise the feature is not usable.