Fortnox Connector
Fortnox is a leading cloud-based platform for financial and business administration, popular in the Nordics.
FortnoxYour warehouseLive
Agent context over MCPSet up in minutes.
No code, no maintenance.
Fortnox
Data source
Fortnox in your warehouse.
Ready for your agents.
Fortnox is a leading cloud-based platform for financial and business administration, popular in the Nordics. Weld's Fortnox connector is fully managed: it extracts data from Fortnox, loads it into your warehouse, and keeps it in sync. The data lands in a clean, documented schema with agent context attached, so analysts can query it with SQL or dbt, and agents can query it over the Weld MCP server without guessing at tables or joins.
Fortnox data schema.
The map your agents read.
Every table, field and relationship Weld syncs from Fortnox is served to agents as context over MCP, so they pick the right tables and join on the right keys.
- tables
- 23
- fields
- 533
Fortnox models.
What the numbers mean.
Open-source SQL that turns the raw Fortnox tables into the reports people ask about. Deploy them in Weld and your agent queries the definitions, not guesses.
- General ledgerThe general ledger (huvudbok): every booked voucher row with its voucher, account and financial year. Recreates the transaction list behind Fortnox's Huvudbok report.grain: one row per voucher row (financial year x voucher series x voucher number x row index)
- Payables agingAccounts payable aging (leverantörsreskontra): every supplier invoice with an open balance, bucketed by days past due as of today.grain: one row per open supplier invoice
- Profit and loss by monthIncome statement by month (resultaträkning per månad), at account level with the BAS report line alongside so it can be rolled up to the statutory layout in BI.grain: one row per financial year x month x account, income statement accounts only (BAS 3000-8989)
- Receivables agingAccounts receivable aging (kundreskontra, förfallna fakturor): every customer invoice with an open balance, bucketed by days past due as of today.grain: one row per open customer invoice
- Trial balanceTrial balance per financial year (saldobalans): opening balance, the year's debits and credits, and closing balance for every account.grain: one row per financial year x account
Ask your agent.
It already knows Fortnox.
Connect Claude, Cursor, ChatGPT or your own agent to Weld over MCP. It reads the Fortnox context, finds the tables it needs and queries your warehouse.
- Agent contextFortnox tables, fields and joins
- QuerySQL against your warehouse
- OperateCheck, rerun and refresh syncs
How many invoices rows do we have in our Fortnox data?
Reading the Fortnox context first, so the query uses the right tables and keys.
Load Fortnox into any warehouse.
Set up in minutes, no code.
Everything you need.
To get started.
Fortnox setup guide
Step-by-step instructions to configure and start syncing.
MCP serverConnect your agents
Set up Claude, Cursor, ChatGPT or Codex against your Weld workspace.
Weld Connect APIBuild custom connectors
Use the Weld Connect API to build and publish your own connector.
FAQCommon questions
Answers to frequently asked questions about Weld connectors.
Set it up in code.
One REST API.
Use the Weld Connect REST API to create Fortnox connections, configure ELT syncs, and manage pipelines entirely through code. Built for embedding, automation, and CI/CD workflows.
▌Common questions.
About connectors.
Something not covered here? A data engineer can walk through your setup with you.
Talk to usPut your Fortnox data to work.
Connect Fortnox, pick a warehouse, and your agents can query it today. Free for 14 days, no credit card.
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