Fortnox MCP Server

An MCP (Model Context Protocol) server for integrating with the Fortnox Swedish accounting system. This server enables LLMs to interact with Fortnox for managing invoices, customers, suppliers, orders, accounts, vouchers, and provides business intelligence analytics.

Two Ways to Use

Quick Start: Remote Mode (Recommended)

The easiest way to use Fortnox MCP - no credentials needed, just authorize in your browser.

Option A: Add to Claude.ai (Web)

1. Go to claude.ai
2. Navigate to Settings → Integrations → Add Integration
3. Enter the URL: https://fortnox-mcp.vercel.app/mcp
4. Wait for it to load, then authorize access by clicking connect

Option B: Add to Claude Desktop

Open your Claude Desktop config file:

• macOS: ~/Library/Application Support/Claude/claude_desktop_config.json
• Windows: %APPDATA%\Claude\claude_desktop_config.json

Add this configuration:

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

Restart Claude Desktop. When you first ask Claude to do something with Fortnox, a browser window will open for you to authorize access to your Fortnox account. Once authorized, you're all set!

Quick Start: Local Mode (Self-Hosted)

For developers who want to run the server locally or use their own Fortnox app credentials.

1. Get your Fortnox credentials

1. Register at Fortnox Developer Portal
2. Create an application to get your Client ID and Client Secret
3. Complete the OAuth2 flow to get a Refresh Token

2. Add to Claude Desktop

Open your Claude Desktop config file:

• macOS: ~/Library/Application Support/Claude/claude_desktop_config.json
• Windows: %APPDATA%\Claude\claude_desktop_config.json

Add this configuration:

{
  "mcpServers": {
    "fortnox": {
      "command": "npx",
      "args": ["-y", "fortnox-mcp-server"],
      "env": {
        "FORTNOX_CLIENT_ID": "your-client-id",
        "FORTNOX_CLIENT_SECRET": "your-client-secret",
        "FORTNOX_REFRESH_TOKEN": "your-refresh-token"
      }
    }
  }
}

3. Restart Claude Desktop

That's it! You can now ask Claude to manage your Fortnox invoices, customers, and more.

Features

Customer Management

• fortnox_list_customers - List and search customers
• fortnox_get_customer - Get customer details
• fortnox_create_customer - Create new customer
• fortnox_update_customer - Update customer
• fortnox_delete_customer - Delete customer

Invoice Management

• fortnox_list_invoices - List invoices with filtering
• fortnox_get_invoice - Get invoice details with line items
• fortnox_create_invoice - Create new invoice
• fortnox_update_invoice - Update draft invoice
• fortnox_bookkeep_invoice - Bookkeep invoice
• fortnox_cancel_invoice - Cancel invoice
• fortnox_credit_invoice - Create credit note
• fortnox_send_invoice_email - Send invoice by email

Supplier Management

• fortnox_list_suppliers - List and search suppliers
• fortnox_get_supplier - Get supplier details
• fortnox_create_supplier - Create new supplier
• fortnox_update_supplier - Update supplier
• fortnox_delete_supplier - Delete supplier

Supplier Invoice Management

• fortnox_list_supplier_invoices - List supplier invoices with filtering
• fortnox_get_supplier_invoice - Get supplier invoice details
• fortnox_approve_supplier_invoice - Approve supplier invoice for payment
• fortnox_payables_report - Get accounts payable aging report

Order Management

• fortnox_list_orders - List sales orders with filtering
• fortnox_list_offers - List offers/quotes with filtering

Account Management

• `fortnox_list_

... View full README on GitHub