Connector guide3-minute read15 MCP tools7 languages

Fortnox to MCP — Drive Fortnox from any AI Agent

Fortnox — the Swedish SMB accounting standard: customers, invoices, supplier invoices, articles, orders, vouchers and the account chart. REST API v3, OAuth 2.0.

HCBy HelpCode teamUpdated 3 min read Open-source on GitHub

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Fortnox

Fortnox

Fortnox, the Swedish SMB accounting standard: customers, invoices, supplier invoices, articles, orders, vouchers and the account chart. REST API v3, OAuth 2.0.

tools

15

Region

SE

Category

Accounting

Authentication

OAuth 2.0

Required env vars

FORTNOX_CLIENT_IDFORTNOX_CLIENT_SECRET
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    No credit card required
  • GDPR & SOC 2 ready
    EU data residency, audit logs
  • Open-source on GitHub
    Open source · AGPL-3.0
  • Works with ChatGPT, Claude, Gemini
    Any MCP-compatible client

Skip the install. Get this working in under 2 minutes.

Start a free trial on cloud.anythingmcp.com, add the Fortnox in one click, then point your AI client (Claude, ChatGPT, Copilot or Cursor) at the generated MCP endpoint. No Docker, no git clone, zero engineering experience required.

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Summary

Fortnox — the Swedish SMB accounting standard: customers, invoices, supplier invoices, articles, orders, vouchers and the account chart. REST API v3, OAuth 2.0.

Try asking

Example prompts for Fortnox

Click any prompt to copy it. Paste into Claude, ChatGPT, Cursor, Gemini, Copilot or OpenClaw to run it against this connector.

Fortnox · live via MCP
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Opus 4.7

Claude is AI and can make mistakes. Please double-check responses.

💡 No install? Use cloud.anythingmcp.com directly. Sign in, click Connectors → Fortnox, paste your credentials, mint an MCP API key — done. No Docker, no git clone, no local server.

Fortnox

Fortnox — the Swedish SMB accounting standard: customers, invoices, supplier invoices, articles, orders, vouchers and the account chart. REST API v3, OAuth 2.0.

Setup

Getting a token

  1. Register at the Fortnox Developer Portal and create an integration. You receive a client id and client secret.
  2. Run the authorization-code flow once for the customer's Fortnox account, asking for the scopes you need — invoice, customer, article, order, supplierinvoice, bookkeeping, settings. Keep the refresh token.
  3. Set FORTNOX_CLIENT_ID, FORTNOX_CLIENT_SECRET and FORTNOX_REFRESH_TOKEN. AnythingMCP refreshes the access token on its own.

…(continued in the in-app connector instructions)

Prerequisites: FORTNOX_CLIENT_ID, FORTNOX_CLIENT_SECRET, FORTNOX_REFRESH_TOKEN

Install the connector locally

curl -fsSL https://raw.githubusercontent.com/HelpCode-ai/anythingmcp/main/docker-compose.quickstart.yml -o docker-compose.yml
printf 'JWT_SECRET=%s\nENCRYPTION_KEY=%s\n' "$(openssl rand -hex 32)" "$(openssl rand -hex 32)" > .env
docker compose up -d

Open http://localhost:3000/connectors/store, pick Fortnox and paste in the env vars listed under Prerequisites.

Available tools

ToolWhat it does
fortnox_get_company_settingsRead the connected company's settings: name, organisation number, VAT number, address and currency
fortnox_list_customersList customers with their number, name, organisation number, address and payment terms
fortnox_get_customerRead one customer by their customer number, with addresses, delivery defaults, VAT settings and price list
fortnox_list_invoicesList invoices with their number, date, due date, customer, total and balance
fortnox_get_invoiceRead one invoice in full: every row with article, quantity, price and VAT, the totals, the payment terms and the balance outstanding
fortnox_list_supplier_invoicesList supplier invoices with their supplier, date, due date, total and payment state — the payables side of the ledger
fortnox_list_ordersList sales orders with their number, customer, date, delivery state and total, for the pipeline between quote and invoice
fortnox_list_articlesList articles with their number, description, sales price, purchase price, stock quantity and unit
fortnox_list_vouchersList bookkeeping vouchers in a financial year with their series, number, date and description — the ledger underneath the documents
fortnox_list_accountsList the chart of accounts for a financial year with each account's number, description, VAT code and balance-carry setting
fortnox_create_invoiceCreate a customer invoice as an unbooked draft: customer, dates and rows
fortnox_list_attachmentsList the files attached to one invoice, order or offer: attachment id, fileId and whether the file goes out with the document…
fortnox_attach_filesAttach files that are already in the Fortnox inbox or archive to one or more invoices, orders or offers, optionally to be sent with the…
fortnox_detach_fileDetach one file from its invoice, order or offer by attachment id; the file itself stays in the Fortnox archive
fortnox_list_inboxList the files and sub-folders of the Fortnox inbox (Inkorgen) or of one of its folders, with each file's Id, Name, Size and ArchiveFileId

Next steps

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