# Update customer details by External Key

Updates the details of a specific customer using their External Key and the provided update data.

Endpoint: PATCH /customers/{externalKey}
Version: 1.0

## Path parameters:

  - `externalKey` (string, required)
    External Key of the customer to update
    Example: "cus_c93f7e842b89b9f7cad17918"

## Header parameters:

  - `cc-api-key` (string, required)
    Chaching API Key

## Request fields (application/json):

  - `email` (string)

  - `name` (string)

  - `billingAddress` (object)

  - `billingAddress.address1` (string)

  - `billingAddress.address2` (string)

  - `billingAddress.postalCode` (string)

  - `billingAddress.city` (string)

  - `billingAddress.country` (string)

  - `billingAddress.state` (string)

  - `billingAddress.phone` (string)

  - `shippingAddress` (object)

  - `shippingAddress.shippingAddress1` (string)

  - `shippingAddress.shippingAddress2` (string)

  - `shippingAddress.shippingPostalCode` (string)

  - `shippingAddress.shippingCity` (string)

  - `shippingAddress.shippingCountry` (string)

  - `shippingAddress.shippingState` (string)

  - `shippingAddress.shippingPhone` (string)


## Response 400 fields