Fortnox to MotherDuck integration

Connect Fortnox to MotherDuck and automatically sync your finance & accounting data. Weld extracts data from Fortnox, loads it into MotherDuck, and lets you transform the data using SQL or dbt, no custom scripts required.

4.8 on G2
FortnoxSource
WeldWeld
MotherDuckWarehouse
Weld · New sync
FortnoxSourceFortnoxConnected
Tables to sync
  • invoices100 cols
  • employees74 cols
  • customers70 cols
  • articles47 cols
  • suppliers43 cols
  • supplier_invoices39 cols
  • Extract
  • Load
  • Keep in sync
MotherDuckDestinationMotherDuckReady
fortnox schema
  • fortnox.invoicesSynced
  • fortnox.employeesSyncing
  • fortnox.customersSynced
  • fortnox.articlesSynced
  • fortnox.suppliersSynced
  • fortnox.supplier_invoicesSynced
Fortnox tables
23
fields, typed
533
agent context included
MCP

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How it works

How to set up Fortnox to MotherDuck in Weld.
In the app, with the API or an agent.

Weld · New Fortnox sync
FortnoxNew connectionFortnoxAuthorised
Connection namefortnox
AuthorizeOpens Fortnox to grant read access
Use cases

Why sync Fortnox to MotherDuck?
Ready for analysis.

Centralizing your Fortnox data in MotherDuck lets you join it with other data sources for cross-platform analytics and deeper insights.

Build reliable dashboards and reports by querying Fortnox data directly in MotherDuck using SQL or your preferred BI tool.

  • Financial reporting

    Centralize financial data from Fortnox in MotherDuck for automated financial dashboards and month-end close analysis.

  • Centralized data warehouse

    Bring Fortnox data into MotherDuck alongside other sources to create a single source of truth for your organization.

  • Automated reporting

    Replace manual exports and spreadsheet-based reporting with automated pipelines from Fortnox to MotherDuck. Connect BI tools like Looker, Metabase, or Power BI.

Schema

What data can you sync?
Every Fortnox table, keys intact.

Weld syncs the objects the Fortnox connector exposes into MotherDuck, and you choose which tables and fields to include. The connector's docs list what is available.

Open the schema explorer
All 23 tables
  • invoices
  • employees
  • customers
  • articles
  • suppliers
  • supplier_invoices
  • invoices_invoice_rows
  • supplier_invoice_rows
  • accounts
  • voucher_rows
  • vouchers
  • currencies
  • employee_children
  • financial_years
  • voucher_series
  • cost_centers
  • employees_dated_schedules
  • expenses
  • terms_of_deliveries
  • units
  • way_of_deliveries
  • terms_of_payments
  • tax_reductions
Weld MCP server

Ask your agent.
It queries MotherDuck for you.

Connect Claude, Cursor, ChatGPT or your own agent to Weld over MCP. It reads the Fortnox context, finds the tables it needs and runs the query in MotherDuck.

Claude CodeOpus 5
>

How many invoices rows do we have in MotherDuck?

Reading the Fortnox context first, so the query uses the right tables and keys.

●weld·search_available_references
⎿raw.fortnox.invoices
+ 22 more Fortnox tables
●weld·get_reference_schema
⎿invoices · 100 columns
columns and types
●weld·run_query
⎿select count(*) from {{raw.fortnox.invoices}}
submitted
●weld·get_query_status
⎿DONE
●weld·get_query_result
⎿rows returned
✓Answered from Fortnox data in MotherDuck
>Ask about your Fortnox data
Under the hood

Technical considerations.
What to expect.

Incremental syncing
Weld uses incremental syncing where supported by the Fortnox API, loading only new and updated records to minimize data transfer and warehouse costs.
Schema handling
Weld automatically manages schema changes. If Fortnox adds new fields, they're detected and added to the corresponding MotherDuck tables.
Data freshness
Sync frequency depends on your Weld plan. Most connectors support schedules from every 5 minutes up to daily intervals.
Security
All data is encrypted in transit (TLS) and at rest. Weld is SOC 2 Type II compliant and supports IP whitelisting for database connections.
FAQ

Common questions.
About Fortnox to MotherDuck.

Start syncing Fortnox to MotherDuck.

Set up your Fortnox data pipeline in minutes. No credit card required. Free for 14 days.

FortnoxSource
WeldWeld
MotherDuckWarehouse