Fortnox API

11 endpoints for Fortnox, each at its own method and path, called with your API key. Open an endpoint for its inputs, examples and response.

Base URL: https://cotlet.dev/api/v1/fortnox
Connects with: Your own Fortnox user, with access to Fakturering for invoices and payments and to Bokföring for vouchers
Integration page: Fortnox

Read (5)

Return data and change nothing in the account.

Fortnox Endpoints: Read
Endpoint	Description
GET /customers	Customers in the customer register with number, name, organisation number and email.
GET /invoices	Customer invoices with number, customer, dates, total and remaining balance.
GET /invoices/{invoice_number}	One invoice with its rows, totals, booked state and payments.
GET /vouchers	Vouchers in a voucher series and date range with description and total.
GET /financial-years	Financial years that exist in the company, with start and end dates.

Change the account. Calls marked Confirm wait for the user to approve them.

Fortnox Endpoints: Write
Endpoint	Description
POST /customers	Add a customer to the customer register with name, email and organisation number.
POST /customers/{customer_number}/invoices Confirm	Save a customer invoice with dates and rows. It is saved, not booked and not sent.
POST /invoices/{invoice_number}/bookkeep Confirm	Book a saved invoice. A booked invoice can no longer be changed.
POST /invoices/{invoice_number} Confirm	Send a booked invoice to the customer by email, e-invoice or print service.
POST /invoices/{invoice_number}/payments Confirm	Register a received payment, full or partial, against a customer invoice.
POST /vouchers Confirm	Book a voucher with rows of account, debit and credit in a voucher series.