Generate Invoice PDF

Retrieves a PDF‐formatted version of an existing invoice.

Clients issue a GET request to /v2/invoice/pdf?id={id} where {id} is the numeric identifier of the invoice you wish to download. On success, the server responds with HTTP 200 and streams back a binary PDF (Content-Type: application/pdf) along with a Content-Disposition header that suggests the filename.

Because this is a read-only operation, it is safe and idempotent, and responses can be cached by HTTP caches or CDNs. If no invoice exists with the given ID, the endpoint returns HTTP 404 with a JSON error payload; any unexpected failure returns HTTP 500 with an explanatory message.