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# Create purchase

> Register a purchase from a supplier or a cash purchase, with VAT, cost account and payment. Inputs, cURL, Python and Node.js examples and an example response.

Source: https://cotlet.dev/docs/api/fiken/create_purchase

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)

Register a purchase from a supplier or a cash purchase, with VAT, cost account and payment.

Fiken API: https://cotlet.dev/docs/api/fiken.md

`POST https://cotlet.dev/api/v1/fiken/purchases`

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

Registers one purchase like Registrer kjøp in Fiken: a supplier purchase (kjøp fra leverandør) or a cash purchase (kontantkjøp), with one or more lines of gross amount, VAT type and cost account. Attach a document with inbox_document_id. paid_from is bank_account, cash, out_of_pocket (Utlegg, paid by you personally) or unpaid; an unpaid purchase is paid later in Fiken. A booked purchase cannot be edited directly: Fiken cancels the booking and makes a new draft. Check list_purchases for the same invoice number first. By default you confirm each call; you can switch that off for this tool.

## Parameters

| Name | Type | Required | Description |
|---|---|---|---|
| `kind` | enum | yes | supplier or cash_purchase. |
| `supplier_id` | integer | no | Contact ID from list_contacts. Required for supplier. |
| `date` | date | yes | Invoice or receipt date. |
| `invoice_number` | string | no | The supplier's invoice number, used to avoid booking a document twice. |
| `due_date` | date | no | Due date, if different from the invoice date. |
| `lines` | array | yes | Objects with description, gross_amount, vat_type (for example HIGH, MEDIUM, LOW or NONE) and expense_account. Several objects split the purchase. |
| `paid_from` | enum | no | bank_account, cash, out_of_pocket or unpaid. Default: unpaid. |
| `bank_account` | string | no | Account code from list_bank_accounts. Required for bank_account. |
| `payment_date` | date | no | Date of payment. Default: the purchase date. |
| `inbox_document_id` | integer | no | Document ID from list_inbox or upload_receipt. |
| `currency` | string | no | ISO 4217 code. Default: NOK. |

## Request

**cURL**

```bash
curl -X POST https://cotlet.dev/api/v1/fiken/purchases \
  -H "Authorization: Bearer $COTLET_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{"kind":"supplier","supplier_id":6120455,"date":"2026-10-09","invoice_number":"88214","due_date":"2026-10-23","lines":[{"description":"Printer paper and toner","gross_amount":1250,"vat_type":"HIGH","expense_account":"6800"}],"paid_from":"bank_account","bank_account":"1920:10001","payment_date":"2026-10-09","inbox_document_id":3318240}'
```

**Python**

```python
result = client.call("fiken", "create_purchase", {"kind":"supplier","supplier_id":6120455,"date":"2026-10-09","invoice_number":"88214","due_date":"2026-10-23","lines":[{"description":"Printer paper and toner","gross_amount":1250,"vat_type":"HIGH","expense_account":"6800"}],"paid_from":"bank_account","bank_account":"1920:10001","payment_date":"2026-10-09","inbox_document_id":3318240})
```

**Node.js**

```js
const result = await cotlet.call('fiken', 'create_purchase', {"kind":"supplier","supplier_id":6120455,"date":"2026-10-09","invoice_number":"88214","due_date":"2026-10-23","lines":[{"description":"Printer paper and toner","gross_amount":1250,"vat_type":"HIGH","expense_account":"6800"}],"paid_from":"bank_account","bank_account":"1920:10001","payment_date":"2026-10-09","inbox_document_id":3318240});
```

**CLI**

```bash
cotlet call fiken create_purchase --data '{"kind":"supplier","supplier_id":6120455,"date":"2026-10-09","invoice_number":"88214","due_date":"2026-10-23","lines":[{"description":"Printer paper and toner","gross_amount":1250,"vat_type":"HIGH","expense_account":"6800"}],"paid_from":"bank_account","bank_account":"1920:10001","payment_date":"2026-10-09","inbox_document_id":3318240}'
```

## Example response

```json
{
  "purchase_id": 8820145,
  "kind": "supplier",
  "supplier": "Kontorbutikken AS",
  "date": "2026-10-09",
  "invoice_number": "88214",
  "net": 1000,
  "vat": 250,
  "gross": 1250,
  "currency": "NOK",
  "paid": true,
  "balance": 0,
  "document_attached": true
}
```

Previous: [Upload receipt](https://cotlet.dev/docs/api/fiken/upload_receipt.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.