# Get Invoicing Customer by ID

Returns an invoicing customer by their ID.

Endpoint: GET /billing/customers/{customer_id}
Version: 1.0.0
Security: apiKeyAuth

## Path parameters:

  - `customer_id` (string, required)

## Header parameters:

  - `x-entity-id` (string)
    Optional entity ID for scoped access to entity-specific data

## Response 200 fields (application/json):

  - `id` (string, required)

  - `nickname` (string, required)

  - `email` (any)

  - `address` (any)

  - `created_time` (string, required)

  - `updated_time` (any)

## Response 422 fields (application/json):

  - `detail` (array)

  - `detail.loc` (array, required)

  - `detail.msg` (string, required)

  - `detail.type` (string, required)