> ## Documentation Index
> Fetch the complete documentation index at: https://docs.creptapay.com/llms.txt
> Use this file to discover all available pages before exploring further.

# Update Customer

Update specific details of an existing customer profile.

## Request authentication

This endpoint requires a **Secret Key** (`sk_...`) passed in either the `x-api-key` header or as a Bearer token in the `Authorization` header.

## Path parameters

<ResponseField name="id" type="string" required>
  The unique ID of the customer to update.
</ResponseField>

## Request parameters

<ResponseField name="email" type="string">
  The new email address for the customer profile.
</ResponseField>

<ResponseField name="first_name" type="string">
  The new first name for the customer profile.
</ResponseField>

<ResponseField name="last_name" type="string">
  The new last name for the customer profile.
</ResponseField>

<ResponseField name="phone" type="string">
  The new phone number for the customer profile.
</ResponseField>