Fortnox + AIAI for your Fortnox bookkeeping — ask and get answers instantly
Nordsynk connects ChatGPT and Claude directly to Fortnox. Ask about VAT, invoices, and results, draft records, and review your books — in plain language, right in the chat.
Activated via Fortnox, 199 SEK per Fortnox company and user per month. Browser approval is the default; a company can enable auto-approve. Fortnox permissions and Nordsynk access policies always apply.
Commercial model
Connect your AI assistant
Choose the right setup for ChatGPT, Claude, or MCP
The Fortnox + AI page is the hub. From here, each user can continue to the guide that matches the client they actually use.
Fortnox for ChatGPT
For teams that want to query Fortnox from ChatGPT and understand how Nordsynk differs from Zapier or Make flows.
Open the ChatGPT guideFortnox for Claude
For users who want to connect Claude Desktop or claude.ai to Fortnox through a hosted MCP server.
Open the Claude guideFortnox MCP server
For developers and technical buyers who want the MCP setup, API surface, OAuth details, and self-hosting comparison.
Open the MCP pageAI client
ChatGPT or Claude
You ask in plain language
MCP server
Nordsynk
OAuth consent · access policy
Bookkeeping
Fortnox
Your company, your permissions
Writes
By default a browser preview opens that you approve or reject.
What you can offer from day one
Ask finance questions in plain language
Unpaid invoices, supplier balances, bookkeeping checks, and project follow-up become normal chat prompts instead of menu hunts.
Create records from chat
Users work from their AI assistant, confirm changes when needed, and connect to Fortnox instead of learning another internal web tool first.
Keep rollout under Fortnox control
The company activates Nordsynk in Fortnox once, then assigns seats and lets each user connect with their own Fortnox account.
Example prompts
How the rollout works
The website qualifies the buyer and points them into the right Fortnox step. The actual product activation happens in Fortnox, and the user setup happens in the AI assistant.
Example · sample invoices
| No. | Days | Customer | Amount |
|---|---|---|---|
| 2014 | 41 | Björk & Co | 8 400 |
| 2019 | 36 | Björk & Co | 3 200 |
| 2027 | 33 | Strand AB | 15 000 |
Fortnox AI vs. Nordsynk — what sets them apart?
Fortnox has a built-in AI feature that helps interpret supplier invoices and suggests bookkeeping accounts during registration. It is a valuable tool for invoice interpretation inside Fortnox's own interface. Nordsynk solves a different problem: exposing the entire Fortnox API — 377 operations — as a single MCP tool so you can use ChatGPT, Claude, or Cursor as a natural-language interface to your entire Fortnox environment. They are complements, not competitors.
Common use cases
Nordsynk fits finance teams and accounting firms that want to use Fortnox more efficiently without learning a new system. Here are the most common scenarios:
Firm reporting
Run monthly client reviews directly in Claude or ChatGPT. Pull outstanding receivables, compare periods, and summarise client status without exporting to Excel.
Invoice management
Create supplier invoices, credit notes, and reminder invoices via conversation. Nordsynk handles the API calls — you describe the task in plain language.
Account reconciliation
Ask Claude to check whether all vouchers are complete, whether supplier invoices are missing account coding, or whether there are discrepancies in receivables — without manual navigation.
Example · sample supplier invoice
Preview · Fortnox
Create supplier invoice draft, 12 500 kr
Requested via Claude · Acme AB
| Field | In Fortnox now | After approval |
|---|---|---|
| Supplier | In Fortnox now— | After approvalKvarnen AB |
| Amount | In Fortnox now— | After approval12 500.00 kr |
| Cost center | In Fortnox now— | After approvalMarketing |
| Project | In Fortnox now— | After approvalLaunch |
Nothing is written to Fortnox until you approve, unless the company has enabled auto-approve.
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