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# Create invoice

> Issue and stamp a CFDI 4.0 invoice for a client with one or more lines. Inputs, cURL, Python and Node.js examples and an example response.

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

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)

Issue and stamp a CFDI 4.0 invoice for a client with one or more lines.

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

`POST https://cotlet.dev/api/v1/facturama/clients/{client_id}/invoices`

Access: write. Confirm: waits for the user's OK before it runs.

Issues a CFDI 4.0 invoice of type ingreso and stamps it with the SAT, so there is no draft: the invoice is final once the call succeeds. Returns the invoice_id, series, folio, UUID and totals. It uses one folio of your plan and does not email the invoice: use email_invoice for that. A wrong invoice is fixed by cancel_invoice or create_credit_note. By default you confirm each call; you can switch that off for this tool.

## Parameters

| Name | Type | Required | Description |
|---|---|---|---|
| `client_id` | string | yes | Client ID from list_clients or create_client. |
| `items` | array | yes | Lines. Each has description, quantity, unit_price and tax_rate (0.16 for 16% IVA), plus optional product_id from list_products. |
| `payment_form` | string | no | How the client pays, for example transfer or cash. |
| `payment_method` | string | no | Single payment or installments. |
| `series` | string | no | Invoice series. Default: your default series. |

## Request

**cURL**

```bash
curl -X POST https://cotlet.dev/api/v1/facturama/clients/cl_4821/invoices \
  -H "Authorization: Bearer $COTLET_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{"items":[{"description":"Design review hour","quantity":2,"unit_price":500,"tax_rate":0.16}],"payment_form":"transfer","payment_method":"single payment"}'
```

**Python**

```python
result = client.call("facturama", "create_invoice", {"client_id":"cl_4821","items":[{"description":"Design review hour","quantity":2,"unit_price":500,"tax_rate":0.16}],"payment_form":"transfer","payment_method":"single payment"})
```

**Node.js**

```js
const result = await cotlet.call('facturama', 'create_invoice', {"client_id":"cl_4821","items":[{"description":"Design review hour","quantity":2,"unit_price":500,"tax_rate":0.16}],"payment_form":"transfer","payment_method":"single payment"});
```

**CLI**

```bash
cotlet call facturama create_invoice --data '{"client_id":"cl_4821","items":[{"description":"Design review hour","quantity":2,"unit_price":500,"tax_rate":0.16}],"payment_form":"transfer","payment_method":"single payment"}'
```

## Example response

```json
{
  "invoice_id": "Y61TLX-Ls_ZJFqzjanPN1w2",
  "series": "FAC",
  "folio": "101",
  "uuid": "6f1c2a90-3b7e-4d55-9a1e-0c52b8e4d7a1",
  "cfdi_type": "ingreso",
  "status": "issued",
  "issued_at": "2026-10-14T10:32:00-06:00",
  "client": {
    "client_id": "cl_4821",
    "rfc": "XAXX010101000",
    "name": "Estudio Norte SA de CV"
  },
  "items": [
    {
      "description": "Design review hour",
      "quantity": 2,
      "unit_price": 500,
      "subtotal": 1000,
      "tax_rate": 0.16,
      "tax": 160,
      "total": 1160
    }
  ],
  "subtotal": 1000,
  "tax_total": 160,
  "total": 1160,
  "currency": "MXN"
}
```

Previous: [Create client](https://cotlet.dev/docs/api/facturama/create_client.md)
Next: [Create credit note](https://cotlet.dev/docs/api/facturama/create_credit_note.md)

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## 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.