Fortnox in Claude
Ask your books right in the chat.
With More AI - ChatGPT & Claude MCP you connect your Fortnox to Claude. Ask in plain language, and Claude answers with figures from your books — and can prepare invoices, postings and approvals that are sent only once you say yes. Claude’s free plan is enough.
You activate it in the Fortnox App Market. The first 30 days are free under Fortnox’s terms.
Three customers have invoices more than 30 days overdue:
| 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 |
Yes. With what falls due, the balance in six weeks is SEK 263,950:
| Balance today | SEK 212,400 |
| In: customer invoices due | +SEK 148,300 |
| Out: supplier invoices due | −SEK 96,750 |
| In six weeks | SEK 263,950 |
Three invoices are ready to post. Nothing is sent until you approve:
| Pappersgrossisten · 6110 Office supplies | SEK 1,250 |
| Mobilia Telecom · 6212 Mobile phone | SEK 899 |
| Verktygshuset · 5410 Consumables | SEK 3,480 |
| Total | SEK 5,629 |
What can Claude do in Fortnox?
What is overdue from customers?
Read from Fortnox, just now
Overdue customer invoices by customer and age, with reminders if you want.
Show this year’s result by month.
Read from Fortnox, just now
The monthly result from your books, with a chart in the conversation.
Post the receipt I upload.
Read from Fortnox, just now
The receipt is read, coded and proposed as a voucher for your approval.
Which supplier invoices lack documents?
Read from Fortnox, just now
Invoices against their attachments: amount, VAT and payee.
Reconcile the bank account for September.
Read from Fortnox, just now
Your books against the bank, and what does not match.
How are all our companies doing?
Read from Fortnox, just now
An overview of several companies in one connection.
How to connect Claude to Fortnox
- Try it in the Fortnox App Market. Find More AI - ChatGPT & Claude MCP, choose Buy and then Activate. The purchase is made by whoever may buy integrations in your Fortnox, usually an administrator.
- Add the connector in Claude. On claude.ai: Customize → Connectors → Add custom connector, and paste the address below into MCP server URL.
- Sign in to Fortnox. Choose the company and approve. Tip: set Read-only tools to Always allow, so you do not have to approve every read.
The address you paste:
https://accounting.amore.cloud/mcpWhat you need
- A Claude account. The free plan is enough, though it allows only one custom connector.
- A Fortnox account, and the person who buys and first connects the company must be a system administrator.
- The connector is added on claude.ai in the browser and then follows you to Claude’s desktop and mobile apps.
Is it safe to connect Claude to Fortnox?
Claude asks permission for each tool until you say otherwise. Leave Write/delete tools on Needs approval, so Claude always asks before a change. What cannot be undone you also approve on a page of our own.
| Sign-in | With Fortnox’s own sign-in. The AI app never gets your password. |
|---|---|
| Changes | Shown in plain language and sent only once you approve them. |
| Access | Read or write, chosen per company. |
| Storage | No copy of your books. |
| Hosting | In the EU. |
ChatGPT, Claude or Grok — which should I choose?
All three work with Fortnox in the same way: the same questions, the same analyses and the same approvals, and the same licence covers them all. The differences lie in the apps:
| Plan | ChatGPT needs a plan that allows custom MCP servers. In Claude the free plan is enough, with one custom connector. In Grok the free plan is enough to add the connector, but it can be slow when demand is high. |
|---|---|
| Where you add it | ChatGPT: chatgpt.com/plugins in the browser. Claude: Customize → Connectors on claude.ai. Grok: Connectors → New Connector on grok.com. |
| Asking permission | ChatGPT reads without asking and asks before a change. Claude asks for each tool until you set Read-only tools to Always allow. |
| Picking the connector | Grok uses the connector reliably when you ask for it: start with "Use More:", or pick it with @ in the message box. |
| On mobile | The Claude connector follows you to the mobile app. The ChatGPT connector is added at a computer. We have not tried Grok’s mobile app. |
| Gemini | The connector already works in Gemini CLI. The Gemini app allows custom connectors only in the US for now. |
| Several? | Yes. The licence is for the company, not the app, so you can use several — or different ones in different parts of the company. |
What does it cost?
SEK 119 per company per month, excluding VAT (25% is added). Every user in the company included, in Claude and every other AI app. 30 days free through Fortnox.
You activate it in the Fortnox App Market. The first 30 days are free under Fortnox’s terms.
Questions about Fortnox in Claude.
Is Claude’s free plan enough?
Yes. The free plan allows one custom connector. On Team and Enterprise the organisation owner adds the connector, and then everyone connects.
Why does Claude keep asking for permission?
Claude asks for each tool until you change it. Under Customize → Connectors you can set Read-only tools to Always allow. Leave Write/delete tools on Needs approval, so Claude asks before changes.
Do you or Anthropic store my books?
We store no copy of your books. What Claude fetches becomes part of the conversation with Anthropic, under your agreement with them.
What does it cost?
SEK 119 per company per month, excluding VAT, through Fortnox. The Claude account is your own, and the free plan is enough.
Try Fortnox in Claude on your own books.
Activate it in the Fortnox App Market. The first 30 days are free under Fortnox’s terms.