More AI - ChatGPT & Claude MCP (Fortnox)
Connect ChatGPT and Claude to Fortnox: read your books and propose changes you approve before anything is written.
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Fortnox MCP
Your books in ChatGPT and Claude.
More AI - ChatGPT & Claude MCP is an MCP server for Fortnox. It connects your Fortnox to the AI app you already use, so you can ask about your books in plain language — and post, invoice and approve with your consent.
Your AI appMore AI · Fortnox
Which customers have invoices more than 30 days overdue?
Read the customer invoices in Fortnox, all pages
Three customers have invoices more than 30 days overdue:
Overdue more than 30 daysExample
| Lindholms Bygg AB · 2 invoices | SEK 46,250 |
|---|---|
| Café Norrsken · 1 invoice | SEK 8,900 |
| Sjöberg Design · 3 invoices | SEK 31,400 |
| Total | SEK 86,550 |
ExcelPer invoicePrepare reminders
Ask about your books…
What the answers look like.
Overdue more than 30 days
| Lindholms Bygg AB · 2 invoices | SEK 46,250 |
|---|---|
| Café Norrsken · 1 invoice | SEK 8,900 |
| Sjöberg Design · 3 invoices | SEK 31,400 |
| Total | SEK 86,550 |
Example.
Which customers have invoices more than 30 days overdue?
Proposal: voucher
| Account | Debit | Credit |
|---|---|---|
| 6110 Office supplies | 1,000.00 | |
| 2641 Input VAT | 250.00 | |
| 1930 Business account | 1,250.00 | |
| Total | 1,250.00 | 1,250.00 |
EditApprove
Example. Nothing is sent until you press Approve.
Post the receipt I uploaded.
Overdue customer invoices, three companies
| Company | Overdue |
|---|---|
| Norrsken Bygg AB | SEK 128,400 |
| Norrsken Fastigheter AB | SEK 12,000 |
| Norrsken Holding AB | SEK 0 |
| Total | SEK 140,400 |
Invoices between the companies are taken out. Example.
Which of my companies have overdue invoices?
What is a Fortnox MCP server?
MCP (Model Context Protocol) is an open standard for how an AI app reads data from and acts in other systems. It came from Anthropic in autumn 2024 and is used today by ChatGPT, Claude, Copilot and most AI tools for developers, among others.
An MCP server is the bridge between the AI and the system — here between your AI app and your Fortnox. The server tells the AI app what it can do in Fortnox, receives the question, fetches what is needed and calculates the answer. Without one, the AI guesses or you paste figures in yourself.
With More AI - ChatGPT & Claude MCP the assistant reads straight from Fortnox the moment you ask. The answer comes from your books — not from last week’s copy, and not from the AI’s memory.
What can you do with Fortnox MCP?
Follow up
How is the year compared with last? What deviates from last month? Will cash last the coming weeks? Income statement, balance sheet, key figures and a cash-flow forecast in one question.
Customer invoices
Which customers are late, and by how much? Aged receivables, reminders and invoices never sent — and new invoices, sent only once you say yes.
Supplier invoices
Post the inbox, check documents against invoices and see whether a bank giro differs from the supplier register before anything is paid.
VAT and year-end
A VAT sanity check, accruals, balance-account reconciliation and a run-through of what usually needs doing before year-end.
Stock and orders
Stock balances, goods receipts and purchase orders, and delivered orders not yet invoiced — for companies with those Fortnox modules.
Several companies
Connect several companies to one connection and ask about all of them at once: a client overview for firms and a group overview for owners.
39 ready-made analyses and 28 ways of working included. Example questions → · All features, module by module →
Which AI apps work with Fortnox MCP?
| ChatGPT | A custom connector in ChatGPT, on a plan that allows custom MCP servers. How to → |
|---|---|
| Claude | A custom connector in Claude — the free plan is enough. How to → |
| Microsoft Copilot | Through Copilot Studio. Read more → |
| Claude Code, Codex, VS Code | For developers and terminal users. How to → |
The MCP server address you paste into your AI app:
https://accounting.amore.cloud/mcp
You sign in to Fortnox as usual and choose the company. No password is given to the AI app. The same licence works in every app.
How secure is a Fortnox MCP server?
An MCP server that can write to your books should carry the same controls as a person with the same access. This is how we do it:
- Sign-in with Fortnox, not with us. You use Fortnox’s own sign-in and choose the company. The AI app never gets your password.
- Every change is approved in plain text. The assistant proposes, you see exactly what will be sent, and the server sends only the content you approved.
- Sensitive changes need more. A changed supplier bank giro, a deletion or a send-out needs a human click — for bank details also a fresh Fortnox sign-in.
- Read or write, per company. You choose. A read-only company cannot be changed, whatever happens in the AI app.
- No copy of your books. Data is fetched when you ask and not stored by us.
- A change is sent once. If the connection drops mid-posting, nothing is resent blindly — the service asks Fortnox what happened.
- Hosted in the EU. No data is moved out of it.
MCP, API or integration?
The Fortnox API is Fortnox’s programming interface: what developers use to build integrations. It needs code, keys and a registered integration.
A regular integration moves data by fixed rules — orders from a web shop, payments from the bank. It does the same thing every time.
An MCP server sits on top of the API and lets an AI app use it freely, based on what you ask. No code: you ask in plain language and the assistant chooses what it needs. That makes MCP the right tool for questions and analyses no one can predict, and for work that takes judgement — with you approving.
Hosted service or your own MCP server?
There are open-source MCP servers for Fortnox, and for a technical team that can be a good choice. Running your own means registering an integration with Fortnox, operating the server and the sign-in, keeping up when Fortnox changes its API, and building the controls that stop a change being sent twice or without approval.
More AI - ChatGPT & Claude MCP is a hosted service from a Fortnox integration partner. It is bought in the Fortnox App Market and added to your AI app with one address. We run it, update it and keep the controls in place.
What does a Fortnox MCP cost?
SEK 119 per company per month, excluding VAT (25 % is added). The licence covers the whole company, so the price is the same however many people use it:
| 1 user | SEK 119 a month |
|---|---|
| 3 users | SEK 119 a month |
| 10 users | SEK 119 a month |
Several AI connectors for Fortnox charge per user. If more than one person works in the books — a finance lead, an accountant — the difference adds up quickly. The ChatGPT or Claude account is your own. About pricing →
Get started in five minutes.
- Try it in the Fortnox App Market — find More AI - ChatGPT & Claude MCP, choose Buy and then Activate. This is done by a system administrator of your Fortnox. 30 days free.
- Add the connector in ChatGPT or Claude and paste the address above.
- Sign in to Fortnox and choose the company. Then ask as you would ask a colleague.
You activate it in the Fortnox App Market. The first 30 days are free according to Fortnox.
Questions about Fortnox MCP.
Is this Fortnox’s own MCP server?
No. More AI - ChatGPT & Claude MCP is an independent service from a Fortnox integration partner, bought in the Fortnox App Market. It is not a product of Fortnox, OpenAI, Anthropic or Microsoft.
Can the AI change my books on its own?
No. The assistant can propose a change, but it is shown to you in plain text and only sent to Fortnox once you have approved that exact content.
Can I give the AI read-only access?
Yes. Leave write access unticked when you connect, or switch off writing for a company on your connection page. Then nothing can be changed in that company.
What if the assistant proposes something wrong?
Say no, or ask for a change to the proposal — nothing has been sent. If something is already posted, the assistant corrects it with a correction voucher, as an accountant would. Posted vouchers are never deleted.
Do you store my books?
No. No copy of your accounting is stored. Reads are held in working memory for at most three minutes to speed up follow-up questions, then discarded.
Does the company need particular Fortnox modules?
No. The service works with the modules the company has. Ask about something it lacks, such as Warehouse or Orders, and the assistant says so instead of answering with an empty list.
What does it cost?
SEK 119 per company per month, excluding VAT (25 % is added). Every user included, in any AI app. The ChatGPT or Claude account is your own. 30-day trial through Fortnox. About pricing →