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# Download invoice file

> The XML or PDF of one invoice or credit note, as a file. Inputs, cURL, Python and Node.js examples and an example response.

Source: https://cotlet.dev/docs/api/facturama/download_invoice_file

Docs sections: [Get started](https://cotlet.dev/docs.md) · [REST API](https://cotlet.dev/docs/api.md) · [MCP](https://cotlet.dev/docs/mcp.md) · [SDKs & CLI](https://cotlet.dev/docs/sdks.md) · [Integrations](https://cotlet.dev/docs/integrations.md)

The XML or PDF of one invoice or credit note, as a file.

Facturama API: https://cotlet.dev/docs/api/facturama.md

`GET https://cotlet.dev/api/v1/facturama/invoices/{invoice_id}/file/download`

Access: read.

Returns the XML (the legal CFDI) or the PDF of one document as base64 content with its file name. Fails with a not-found error when the ID does not exist.

## Parameters

| Name | Type | Required | Description |
|---|---|---|---|
| `invoice_id` | string | yes | Invoice ID from list_invoices or create_invoice. |
| `format` | enum | yes | xml or pdf. |

## Request

**cURL**

```bash
curl "https://cotlet.dev/api/v1/facturama/invoices/Y61TLX-Ls_ZJFqzjanPN1w2/file/download?format=xml" \
  -H "Authorization: Bearer $COTLET_API_KEY"
```

**Python**

```python
result = client.call("facturama", "download_invoice_file", {"invoice_id":"Y61TLX-Ls_ZJFqzjanPN1w2","format":"xml"})
```

**Node.js**

```js
const result = await cotlet.call('facturama', 'download_invoice_file', {"invoice_id":"Y61TLX-Ls_ZJFqzjanPN1w2","format":"xml"});
```

**CLI**

```bash
cotlet call facturama download_invoice_file --data '{"invoice_id":"Y61TLX-Ls_ZJFqzjanPN1w2","format":"xml"}'
```

## Example response

```json
{
  "invoice_id": "Y61TLX-Ls_ZJFqzjanPN1w2",
  "format": "xml",
  "file_name": "FAC-101.xml",
  "content_base64": "PD94bWwgdmVyc2lvbj0iMS4wIiBlbmNvZGluZz0iVVRGLTgiPz4="
}
```

Previous: [List products](https://cotlet.dev/docs/api/facturama/list_products.md)
Next: [Create client](https://cotlet.dev/docs/api/facturama/create_client.md)

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Cotlet is an independent service. It is not affiliated with, endorsed by or sponsored by any of the products listed on this site. Product names are trademarks of their respective owners.

## For AI agents: sign your user up

Is your user asking you to sign them up for Cotlet? You can do it for them, no account or key needed.

1. Read the fields and their allowed values: GET https://cotlet.dev/api/v1/access-requests
2. Ask the user for each value: email, apps, what you will do with them. If they leave the password to you, generate a strong one and show it to them.
3. Show the user what you will send, then POST it as JSON to https://cotlet.dev/api/v1/access-requests.

One call creates the account and sends the access request; we email the user when access is granted.