Connect ChatGPT to your Fortnox.
First the service is bought in the Fortnox App Market, by you or your administrator. Then you add it to ChatGPT, which takes about five minutes.
Already know how?
Add the address as a custom connector.
https://accounting.amore.cloud/mcpBefore you start: Requires a ChatGPT plan that allows custom MCP servers. Add the connector on chatgpt.com in a browser — it then appears in the desktop app too.
- 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 ChatGPT within ten minutes of the last step.
Not bought yet? How to buy in Fortnox.
Two parts, a few minutes.
Open Plugins
Go to chatgpt.com/plugins, or choose Customize → Plugins in the menu on the left. If ChatGPT is set to another language, the buttons have other names but sit in the same places.
Stuck on this step?
I cannot find Plugins. The mobile app does not have that page. Go to chatgpt.com/plugins from the browser on your computer instead.
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Click Add
Top right of the page.
Stuck on this step?
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Choose Add custom MCP server
More AI - ChatGPT & Claude MCP is an MCP server, so choose this rather than Create plugin.
Stuck on this step?
The option is missing. In a Business or Enterprise workspace, custom MCP servers can be switched off by the administrator. Your ChatGPT administrator can allow them, or set up the connector for the whole workspace.
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Fill in name and address
Enter a name you will recognise, such as More. Under Connection, Server URL should be selected; that is where the address below goes. Keep Authentication on OAuth.
https://accounting.amore.cloud/mcpStuck on this step?
Nothing happens when I click create. Probably another plugin in your account already has that name. Choose a different one, such as More Fortnox.
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Tick that you understand
ChatGPT shows the same warning for every custom MCP server. Tick the box to continue.
Stuck on this step?
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Click Create as a plugin
ChatGPT checks the address and opens the sign-in. It may take a few seconds.
Stuck on this step?
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ChatGPT opens our consent page
The page is in Swedish. It shows which app wants to connect and what it asks for. Tick Ge skrivrättigheter till bokföringen (give write access to the bookkeeping) if the assistant should be able to propose changes — without the tick it can only read, and you can change it later without reconnecting. Din e-postadress (frivilligt) is your email address, and it is optional.
Stuck on this step?
The page says the Fortnox sign-in was not completed. On screen: Inloggningen hos Fortnox slutfördes inte. The sign-in was cancelled, or was not finished within ten minutes of starting. Start again from the app; the second attempt goes faster.
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Sign in to Fortnox
Fortnox opens, headed Logga in i Fortnox (Sign in to Fortnox). Sign in as usual, for example with BankID. The sign-in is done by a system administrator of the company's Fortnox — that is Fortnox's requirement. If you are already signed in, this step is skipped. Your password never passes through us.
Stuck on this step?
Fortnox says a system administrator is missing. The person signing in is not a system administrator of the company's Fortnox. Ask a system administrator to do this step with you, or to give you that role under Inställningar → Användare (Settings → Users) in Fortnox, then start again from the app.
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Choose the company
Under Välj företag (Choose company), choose the company the assistant should work with. You can add more companies in step 5.
Stuck on this step?
It says the licence is missing. The service is not bought or activated for that company. Buy and activate it in the Fortnox App Market — here is how — and start again. Reconnecting without buying does not help.
The company I want is not in the list. The list shows the companies your Fortnox user can access. If the company is missing, an administrator there needs to give you a user in it.
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Approve in Fortnox
Fortnox shows what the service may use. Click Godkänn & aktivera (Approve & activate) — you then come to our page showing that the company is connected.
Stuck on this step?
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More companies, then back to the app
Our page (in Swedish) shows which company is connected. If the service is bought in other companies too, you can bring them in straight away: click Lägg till ett bolag till (Add another company), sign in to Fortnox again and choose the next company. Tick the box there if the assistant should be able to propose changes in that company. Then click Tillbaka till ChatGPT (Back to ChatGPT) within ten minutes — the connection is complete only once you are back in the app.
Stuck on this step?
The page says the time to add more companies ran out. On screen: Tiden för att lägga till fler bolag gick ut. The connection was not completed in time. Start again from the app. You can add more companies at any time afterwards — ask the assistant for a link.
Do all companies have to come along now? No. One connection holds up to 50 companies, and you add the rest later by asking the assistant for a link. The link is valid for fifteen minutes.
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Ask about your company
Open a new chat and ask, for example, "Use More: how many unpaid customer invoices do we have?". Reads run straight away. A change is always shown to you first and sent only once you have approved it. If you wonder what to ask, write "what can I ask you about my bookkeeping?".
Stuck on this step?
ChatGPT says the tool call was blocked. In long chats ChatGPT sometimes never sends the call to us. Start a new chat and ask again.
The warehouse does not show, although we have Fortnox Warehouse. A connection made before 8 October 2026 lacks the warehouse permission, and the warehouse requires the company to have the module. Reconnect in ChatGPT, then add your other companies again.
Does it look different, or are you stuck? Email us about this step — we've already filled in which step you're on.
ChatGPT changes its interface often. The steps were last checked on 8 October 2026.
Not working? Troubleshooting covers what we have seen most often.