Get invoice
One invoice with its rows, totals, booked state and payments.
GET https://cotlet.dev/api/v1/fortnox/invoices/{invoice_number}
read
Returns one invoice with every row, net, VAT and total, whether it is saved or booked, whether it was sent, and the payments registered so far. Read it before register_payment so a short payment is registered as partial.
Parameters
| Name | Type | Description |
|---|---|---|
| invoice_number string required | string | Invoice number from list_invoices or create_invoice. |
Request
curl https://cotlet.dev/api/v1/fortnox/invoices/invoice%20number \
-H "Authorization: Bearer $COTLET_API_KEY"result = client.call("fortnox", "get_invoice", {"invoice_number":"invoice number"})const result = await cotlet.call('fortnox', 'get_invoice', {"invoice_number":"invoice number"});cotlet call fortnox get_invoice --data '{"invoice_number":"invoice number"}'Example response
{
"invoice_number": "2377",
"customer_number": "1042",
"customer": "Nordlys Design AB",
"state": "booked",
"sent": true,
"invoice_date": "2026-09-13",
"due_date": "2026-10-13",
"rows": [
{
"description": "Consulting, September",
"quantity": 10,
"unit_price": 1200,
"net": 12000
}
],
"net": 12000,
"vat": 3000,
"total": 15000,
"balance": 15000,
"payments": [],
"currency": "SEK"
}