The terminal or the editor.

Claude Code, Codex, GitHub Copilot in VS Code and other MCP clients connect with the same address. One command, then you sign in to Fortnox in the browser.

Before you start: after the Fortnox sign-in we show a page (in Swedish) where you can add more companies with Lägg till ett bolag till (Add another company), before you go back to the client.

The service is bought and activated for the right company in the Fortnox App Market. Buying and activating are two separate steps.
A system administrator of the company's Fortnox does the sign-in. Fortnox requires it.
BankID, or whatever else you sign in to Fortnox with, is at hand.
Pop-ups are allowed. The Fortnox sign-in often opens in a window of its own.
Ten minutes in one go. The Fortnox sign-in must be finished within ten minutes, and you must be back in the client within ten minutes of the last step.

Claude Code

Run the command in the terminal. The sign-in opens in the browser the next time a tool is used — or run /mcp in Claude Code and choose more to sign in straight away.

$ claude mcp add --transport http more https://accounting.amore.cloud/mcp

Codex

Run the command, then sign in with codex mcp login more. If you use Codex in ChatGPT on the web, follow the ChatGPT guide instead — the connector follows your ChatGPT account.

$ codex mcp add more --url https://accounting.amore.cloud/mcp

GitHub Copilot in VS Code

Run MCP: Add Server from the command palette, choose HTTP and enter the address — or add the server yourself in .vscode/mcp.json. Sign in to Fortnox when the editor asks.

{
  "servers": {
    "more": {
      "type": "http",
      "url": "https://accounting.amore.cloud/mcp"
    }
  }
}

Other MCP clients

Add the address as a remote server with HTTP transport and OAuth. The client registers itself with us (dynamic client registration), so there is no key or secret to paste — and you should never put one in a configuration file.

https://accounting.amore.cloud/mcp

The sign-in always happens at Fortnox, with your own user. Tools that change something need the same approval as in the chat apps: you see exactly what will be sent, and nothing is sent until you say yes.