# 📄 Get invoice file download links

Get download links for invoice files in various e-invoicing formats.

Returns signed S3 download URLs for the invoice in the requested format(s).
If no format is specified, returns links for all available formats.

Supported formats:
- facturx: FacturX PDF with embedded XML (French standard)
- ubl: Universal Business Language XML
- cii: Cross Industry Invoice XML

Args:
    invoice_id: The invoice ID to get download links for
    format: Optional specific format to get download link for

Returns:
    InvoiceDownloadResponse with signed download URLs

Endpoint: GET /invoicing/invoices/{invoice_id}
Version: 1.0.0

## Path parameters:

  - `invoice_id` (string, required)

## Query parameters:

  - `format` (any)

## Header parameters:

  - `X-PDP-Client-Id` (string, required)
    ID of the PDP Client for which the operation is performed

## Response 200 fields (application/json):

  - `invoice_id` (string, required)
    Invoice ID

  - `available_formats` (array, required)
    List of available download formats

  - `available_formats.format` (string, required)
    Invoice format
    Enum: "facturx", "ubl", "cii"

  - `available_formats.download_url` (string, required)
    Signed S3 download URL

  - `available_formats.expires_at` (string, required)
    When the download link expires

  - `available_formats.file_name` (string, required)
    Suggested filename for download

  - `available_formats.file_size` (any)
    File size in bytes

  - `available_formats.content_type` (string, required)
    MIME content type

  - `generated_at` (string, required)
    When the download links were generated

## Response 401 fields (application/json):

  - `error` (string, required)

  - `code` (integer, required)

  - `trace_id` (string, required)

## Response 422 fields (application/json):

  - `detail` (array)

  - `detail.loc` (array, required)

  - `detail.msg` (string, required)

  - `detail.type` (string, required)


## Response 400 fields

## Response 404 fields