POST /reactions.add

Add a reaction to a message

Detail	Value
Operation ID	messaging.addReaction
Method	POST
Path	/reactions.add
Connector	Slack

Parameters

No parameters.

Request Body

Field	Type
channel	string
timestamp	string
name	string

Using this endpoint in a workflow

1. Add an API Call node to your workflow.
2. Pick your Slack connection from the Connection dropdown.
3. In the Operation dropdown, select messaging.addReaction.
4. Fill in the parameter fields that appear. Use {{...}} to reference upstream values.

Required fields are marked — fill them or the call will fail at runtime.

What it returns

The API Call node writes the response to the workflow context:

{
  status: 200,
  success: true,
  data: { ...response body from the API... },
  latencyMs: 142
}

Reference response fields downstream as {{nodeId.data.path}}. The exact response shape is documented on the upstream Slack API reference.