---
title: "Changes to Add or update a customer"
method: PUT
path: "/api/v1/customers/{identifier}"
---

# Changes to Add or update a customer

`PUT /api/v1/customers/{identifier}`

> Every recorded change to this operation, newest first.

## Timeline

Changed in 1 of 30 revisions.

- **2026-10-30** `7a1d33d191ac`: 1 info

## Changes

- **2026-10-30** `7a1d33d191ac`: 1 info
  - the endpoint scheme security `Track-Bearer-Auth` was added to the API

---

[Operation](https://skmtc.dev/customer/apis/customer-io-journeys-api-reference/docs/api/v1/customers/:identifier/put.md) - [API](https://skmtc.dev/customer/apis/customer-io-journeys-api-reference.md) - [Page](https://skmtc.dev/customer/apis/customer-io-journeys-api-reference/changes/api/v1/customers/:identifier/put)