Fortnox Claude Connector

Accounting, invoices, customers, suppliers, orders — the full Fortnox API via Claude.

MCP Server URL

Built by Sidcom — not published by Fortnox or Anthropic.

Features

List, search and filter all Fortnox resources (invoices, customers, suppliers, articles, orders, offers, etc.)
Create new invoices, customers, articles and other objects
Update and delete resources
Perform actions — bookkeep, cancel, credit, send email
Query company information, settings, currencies and more
Upload receipts and documents to Inbox/Archive, and download invoice PDFs, attachments and SIE files

Install

Claude DesktopClaude CodeClaude CLI

Open Claude Desktop's Settings → Connectors menu and paste the MCP Server URL above. The first time you call a tool, you'll sign in and pick which modules to enable.

Open Claude Connectors

JSON

{
  "mcpServers": {
    "fortnox": {
      "url": "https://fortnox.sidcom.app/mcp"
    }
  }
}

Terminal

›claude mcp add fortnox https://fortnox.sidcom.app/mcp

Available modules

When connecting you choose which modules to enable. Deselect any you don't have a license for:

Company InformationCustomerSupplierArticleInvoiceSupplier InvoiceOfferOrderBookkeepingPaymentsSettingsArchiveInboxConnect FilesPrintCurrencySalary

Tools

fortnox_describe — Look up field schema and examples for a resource
fortnox_list — List and search resources with filters
fortnox_get — Fetch a resource by number/ID
fortnox_create — Create a new resource
fortnox_update — Update an existing resource
fortnox_delete — Delete a resource
fortnox_action — Bookkeep, cancel, credit, email, etc.
fortnox_upload_file — Upload PDFs and images to Inbox or Archive
fortnox_download_file — Download invoice PDFs, attachments, SIE files

About Fortnox

Fortnox – in the heart of business life. Fortnox empowers businesses to launch, grow, and thrive. Through cutting-edge technical solutions for companies and accounting firms, streamlined financing, and a powerful ecosystem of partnerships, Fortnox stands as the vital hub for entrepreneurship in Sweden. Our vision: a prosperous society shaped by thriving businesses. Fortnox was established in 2001, with the main office in Växjö.

fortnox.se