Fortnox MCP Server

by jakobwennbergio.github.jakobwennberg/fortnoxv1.0.0

MCP server for Fortnox Swedish accounting API integration

40Node.jsstdioofficial registry

context tax

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security

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freshness

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Install Fortnox MCP server

claude mcp add fortnox -e FORTNOX_CLIENT_ID='<fortnox-client-id>' -e FORTNOX_CLIENT_SECRET='<fortnox-client-secret>' -e FORTNOX_REFRESH_TOKEN='<fortnox-refresh-token>' -- npx -y fortnox-mcp-server

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

Add to ~/.cursor/mcp.json (global) or .cursor/mcp.json (project).

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

Settings → Developer → Edit Config (claude_desktop_config.json), then restart.

{
  "servers": {
    "fortnox": {
      "type": "stdio",
      "command": "npx",
      "args": [
        "-y",
        "fortnox-mcp-server"
      ],
      "env": {
        "FORTNOX_CLIENT_ID": "<fortnox-client-id>",
        "FORTNOX_CLIENT_SECRET": "<fortnox-client-secret>",
        "FORTNOX_REFRESH_TOKEN": "<fortnox-refresh-token>"
      }
    }
  }
}

Add to .vscode/mcp.json in your workspace.

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

Add to ~/.codeium/windsurf/mcp_config.json.

Configuration

Variable	Required	Secret	Description
FORTNOX_CLIENT_ID	yes	yes	Your Fortnox app client ID from developer.fortnox.se
FORTNOX_CLIENT_SECRET	yes	yes	Your Fortnox app client secret
FORTNOX_REFRESH_TOKEN	yes	yes	OAuth2 refresh token obtained from Fortnox authorization flow

Freshness

Slowing — last maintenance signal 5mo ago. The newest of the signals below sets the band.

Last commit (default branch)
2026-04-28 · 5mo ago · GitHub
Latest release
no data · GitHub
Package published
no data · npm/PyPI
Registry entry updated
2026-01-25 · 9mo ago · official registry · v1.0.0

FAQ

›How do I install the Fortnox MCP server in Claude Code?

Run: claude mcp add fortnox -e FORTNOX_CLIENT_ID='<fortnox-client-id>' -e FORTNOX_CLIENT_SECRET='<fortnox-client-secret>' -e FORTNOX_REFRESH_TOKEN='<fortnox-refresh-token>' -- npx -y fortnox-mcp-server. For Cursor, VS Code, Claude Desktop and Windsurf, use the install tabs above.

›Does Fortnox require an API key?

Yes. It expects FORTNOX_CLIENT_ID, FORTNOX_CLIENT_SECRET, FORTNOX_REFRESH_TOKEN, of which 3 are secrets.

›Can I use Fortnox as a remote (hosted) MCP server?

No hosted endpoint is published; it runs locally over stdio.

›Is Fortnox in the official MCP registry?

Yes, as io.github.jakobwennberg/fortnox.