Best answer

Send webhook query string to slack

  • 15 October 2022
  • 6 replies

i’m using a Zapier catch hook url to capture the post from an application. The post includes data in the query string. I’ve set up a Slack channel and integration to get notified when the app posts to the Zapier webhook. 

How do a get the query string from the post to be included in the generated Slack message? I can only find how to add a static message, e.g. “new message from app, file ready”

Sample post to the Zapier webhook catch: 

curl --location --request POST ''

I want the triggered Slack message to include:

  • reference_id=sample-ref-id-3
  • event=delivered
  • action_id=sample-action-id-3
  • external_id=product-sample

Best answer by Troy Tessalone 17 October 2022, 21:15

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6 replies

Userlevel 7
Badge +14

Hi @leland-enkasa 

Good question.

Please post detailed screenshots with how your Zap steps are configured in order for us to have context, thanks.

This may help…



My bad, it’s the ‘post’ body I want to add to the Slack message (not the query string). Config screenshots:

  1. Zap webhook


  1. Slack config
  1. Message text set up -- (I think this is where I should have an option to add the post body to the Slack message, but I don’t see one, and entering text for search does not find any matches. “New scan ready” is my default, static message)


Thanks for you help.

Userlevel 7
Badge +14


You’ll need to properly configure the Webhook POST request that is being made to trigger the Zap to include those parameters/values.

Here’s the post request:

curl --location --request POST '' \

--header 'Content-Type: application/json' \

--data-raw '{

"ticket_id": "123456789",

"event": "delivered",

"model_id": "test-model-ID",

"external_id": "test-External-ID-1"



Here’s the request received in in Zapier, with the values in the post body. Is there a resource that describes the correct configuration?

Thanks for your help.

Userlevel 7
Badge +14


Help article about how to change your trigger test data:

Pull in the new webhook data, then map the values from Step 1 to the Slack step.


Thank you!