Fortnox MCP Server: Install & Setup

Install Fortnox in Claude Code

Claude Code

claude mcp add fortnox -e FORTNOX_CLIENT_ID=... -e FORTNOX_CLIENT_SECRET=... -e FORTNOX_REFRESH_TOKEN=... -- npx -y fortnox-mcp-server

mcp.json (Claude Desktop, Cursor, VS Code, Windsurf)

{
  "mcpServers": {
    "fortnox": {
      "command": "npx",
      "args": [
        "-y",
        "fortnox-mcp-server"
      ],
      "env": {
        "FORTNOX_CLIENT_ID": "...",
        "FORTNOX_CLIENT_SECRET": "...",
        "FORTNOX_REFRESH_TOKEN": "..."
      }
    }
  }
}

Replace each ... with your own value.

Frequently asked questions

What does the Fortnox MCP server do?

MCP server for Fortnox Swedish accounting API integration

Is the Fortnox MCP server free?

The server is free, but you will likely need an account. The server itself is free, but it connects to a service that needs an account or API key, which may have paid tiers. Check the provider for current pricing.

Does Fortnox run locally or remotely?

Local. Runs on your machine (stdio). You install it with npx, uvx, Docker or from source.

How do I add Fortnox to Claude Code?

Run: claude mcp add fortnox -e FORTNOX_CLIENT_ID=... -e FORTNOX_CLIENT_SECRET=... -e FORTNOX_REFRESH_TOKEN=... -- npx -y fortnox-mcp-server

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