POST /merge_customers

Merge two people

Detail	Value
Operation ID	customers.merge
Method	POST
Path	/merge_customers
Connector	Customer.io Track API

Parameters

No parameters.

Request Body

Field	Type
primary	object
secondary	object

Using this endpoint in a workflow

1. Add an API Call node to your workflow.
2. Pick your Customer.io Track API connection from the Connection dropdown.
3. In the Operation dropdown, select customers.merge.
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 Customer.io Track API API reference.