# Retrieve the next available invoice number.

Endpoint: GET /invoices/next_invoice_number
Version: 1.0.0

## Response 200 fields (application/json):

  - `next_invoice_number` (string)
    The next invoice number.

## Response 400 fields (application/json):

  - `errors` (array)

  - `errors.type` (string)

  - `errors.message` (string)