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. It runs locally over stdio via the published package.

People connecting finance tools to Claude, Cursor, VS Code, or another MCP client. The project is written in TypeScript.

VERIFIED ACTIVE

LAST COMMIT 2026-04-28 · ★ 36 · #159 OF 283 MAINTAINED FINANCE · VERIFIED 2026-08-25

MIT · TypeScript servers · how we verify → /methodology

01 · Install Fortnox

before you install - you'll need

Set FORTNOX_CLIENT_ID, FORTNOX_CLIENT_SECRET, FORTNOX_REFRESH_TOKEN before connecting.

Claude Code

claude mcp add jakobwennberg-fortnox-mcp -- npx -y fortnox-mcp-server

Claude Desktop / Cursor / VS Code - add to config

{
  "mcpServers": {
    "jakobwennberg-fortnox-mcp": {
      "command": "npx",
      "args": [
        "-y",
        "fortnox-mcp-server"
      ]
    }
  }
}

Same JSON for Cursor. For VS Code, rename the top-level key from `mcpServers` to `servers`.

Using another client? Same JSON, different key

Claude Desktop · mcpServers

Cursor · mcpServers

VS Code · servers

Windsurf · mcpServers

Zed · context_servers

Cline · mcpServers

Roo Code · mcpServers

Continue · mcpServers

LibreChat · mcpServers

Gemini CLI · mcpServers

Codex CLI · mcp_servers

Full setup guides: every client.

02 · Evidence

Security posture

What to check before giving this server access to your agent - from the registry, GitHub, and our own probes. We don't score safety; we show what's verifiable.

runs as local process (stdio) - runs on your machine with your user's permissions

license MIT - declared in the repository

npm package fortnox-mcp-server - unscoped; check the name against the project README before installing

registry namespace io.github.jakobwennberg is GitHub-verified and matches the repo owner

03 · Who maintains Fortnox

fortnox is maintained by jakobwennberg. It's the only MCP server we track from this author; the repo dates to Jan 2026.

04 · Facts

repository: github.com/jakobwennberg/fortnox-mcp
category: finance - ranked #159 of 283 actively-maintained finance servers as of 2026-08-25.
registry: io.github.jakobwennberg/fortnox (active, first published 2026-01-25)
packages: npm:fortnox-mcp-server

05 · Fortnox FAQ

What is Fortnox?

Is Fortnox still maintained?

Yes - as of 2026-08-25, its last commit was 2026-04-28. We re-verify nightly.

How do I install Fortnox?

Run `npx -y fortnox-mcp-server`. The README documents 3 environment variables (FORTNOX_CLIENT_ID, FORTNOX_CLIENT_SECRET, FORTNOX_REFRESH_TOKEN) to set first. Set FORTNOX_CLIENT_ID, FORTNOX_CLIENT_SECRET, FORTNOX_REFRESH_TOKEN before connecting. You can also paste the ready-made client config above.

Does Fortnox run locally?

Yes - it's a stdio server: it runs on your machine (via npx) with your user's permissions. Your data stays local unless the server itself calls external APIs.

06 · Alternatives to Fortnox

Alternatives to Fortnox

Maintained finance servers if Fortnox isn't the fit.

Pairs well with

Servers that cover what Fortnox doesn't - only shown when the pairing reason fits the companion.

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