Fortnox MCP Server

Connect AI agents to Fortnox — Sweden's largest cloud accounting platform (612,000+ customers).

Manage invoices, customers, suppliers, accounting entries, orders, and more through the Model Context Protocol.

Tools (20)

Category	Tools	Description
Invoices	`list_invoices`, `get_invoice`, `create_invoice`, `send_invoice`, `get_invoice_payments`	Create, send, and track invoices
Customers	`list_customers`, `get_customer`, `create_customer`	Manage your customer database
Suppliers	`list_supplier_invoices`, `get_supplier`, `create_supplier_invoice`	Track bills and expenses
Accounting	`list_vouchers`, `create_voucher`, `get_accounts`, `get_financial_year`	Journal entries and chart of accounts
Reports	`get_company_info`, `list_projects`, `list_cost_centers`	Company info and cost tracking
Orders	`list_orders`, `create_offer`	Sales orders and quotes

Quick Start

1. Get a Fortnox Access Token

2. Configure in Claude Desktop

Add to your claude_desktop_config.json:

{
  "mcpServers": {
    "fortnox": {
      "command": "npx",
      "args": ["-y", "fortnox-mcp-server"],
      "env": {
        "FORTNOX_ACCESS_TOKEN": "your-access-token-here"
      }
    }
  }
}

3. Start Using

Ask Claude things like:

"List all unpaid invoices"
"Create an invoice for customer 1001 with 10 hours of consulting at 1500 SEK/hr"
"Show me the chart of accounts"
"What supplier invoices are overdue?"
"Create a quote for Acme AB"

Install from Source

git clone https://github.com/viggojohansson/fortnox-mcp-server.git
cd fortnox-mcp-server
npm install
npm run build

Then configure Claude Desktop to point to the local build:

{
  "mcpServers": {
    "fortnox": {
      "command": "node",
      "args": ["/path/to/fortnox-mcp-server/dist/index.js"],
      "env": {
        "FORTNOX_ACCESS_TOKEN": "your-access-token-here"
      }
    }
  }
}

Environment Variables

Variable	Required	Description
`FORTNOX_ACCESS_TOKEN`	Yes	OAuth2 access token from Fortnox

API Reference

This server wraps the Fortnox REST API v3. Rate limit: 25 requests per 5 seconds.

License

MIT

fortnox-mcp-server