Access POST data in webhook

Hello, I’m very new to stackstorm and the last few days I was looking in the documentation and the forum for information regarding the different kindes of variables.

I have a webhook and am posting data to the url like

curl -X POST -H “[api-key]” -d “{“key1”:“value1”}” // from Windows

But how do I access this “key1” value in the action of my webhook?

I have something like this:

“action”: {
“ref”: “core.echo”,
“parameters”: {
“message”: “print {{ key1 }}”

Does anybody have more information regarding all kinds of available variables and specially the ones that are transmitted using a webhook?


You can access the incoming webhook body data using {{ }} notation inside the rule.

For example, in your scenario that would be {{ trigger.body.key1 }}.

Keep in mind that you also need to pass correct “Content-Type: application/json” header when sending your webhook data using curl, otherwise StackStorm won’t parse body as JSON, but will treat it as raw string (so the notation mentioned above won’t work, because {{ trigger.body }} will contact the whole body as a string).


curl -X POST -H "[api-key]" -H "Content-Type: application/json" -d “{“key1”:“value1”}” // from Windows

That’s also documented here - Webhooks — StackStorm 3.1.0 documentation.

Hello Tomaz,

thank You very much! This was the part I was missing: {{ trigger.body.key1 }}
It works now as expected.

Kind Regards