PUT /customers/{id}

Create or update a person

Detail	Value
Operation ID	customers.identify
Method	PUT
Path	/customers/{id}
Connector	Customer.io Track API

Parameters

Name	Location	Type	Required
id	path	string	Yes

Request Body

Field	Type
email	string
created_at	integer
anonymous_id	string

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.identify.
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.