Fortnox Connector

Fortnox is a leading cloud-based platform for financial and business administration, popular in the Nordics.

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4.8 on G2

Weld · Data Sources

Fortnox

FortnoxYour warehouseLive

invoices100 columnsSynced

employees74 columnsSynced

customers70 columnsSynced

articles47 columnsSyncing

suppliers43 columnsQueued

Lands in

snowflake

bigquery

databricks

Agent context over MCP

How it works

Set up in minutes.
No code, no maintenance.

Fortnox

Fortnox

Data source

Authenticating...

Ready to connect

Overview

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.

Agent context

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

Loading diagram…

supplier_invoices

balance_brought_forward

balance_carried_forward

cost_center_settings

construction_account

disposable_quantity

personal_identity_number

employee_children

ingoing_withdrawn_days

employees_dated_schedules

financial_years

account_chart_type

accounting_method

url_tax_reduction_list

accounting_method

administration_fee

administration_fee_vat

invoices_invoice_rows

contribution_percent

contribution_value

delivered_quantity

supplier_invoices

administration_fee

supplier_invoice_rows

account_description

item_description

bank_account_number

terms_of_deliveries

description_english

terms_of_payments

reference_number

transaction_date

transaction_information

way_of_deliveries

description_english

Open the schema explorer Open the full schema explorer

Weld MCP server

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

Set up the MCP server

Claude CodeOpus 5

ConnectedWeld MCPAgent contextFortnoxtables23fields533

>

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.

●weld·search_available_references

⎿raw.fortnox.invoices

+ 22 more Fortnox tables

●weld·get_reference_schema

⎿invoices · 100 columns

url, url_tax_reduction_list

●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 your warehouse

>Ask about your Fortnox dataMCP

Destinations

Load Fortnox into any warehouse.
Set up in minutes, no code.

Resources

Everything you need.
To get started.

Fortnox setup guide

Step-by-step instructions to configure and start syncing.

Connect your agents

Set up Claude, Cursor, ChatGPT or Codex against your Weld workspace.

Weld Connect API

Build custom connectors

Use the Weld Connect API to build and publish your own connector.

Common questions

Answers to frequently asked questions about Weld connectors.

Weld Connect API

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.

Explore Weld Connect API reference

POST/elt_syncs

# Create a Fortnox ELT sync
curl -X POST https://connect.weld.app/elt_syncs \
  -H "x-api-key: $API_KEY" \
  -d '{
    "connection_id": "conn_abc123",
    "integration_id": "fortnox",
    "destination_schema_name": "fortnox_data",
    "sync_interval": "0 * * * *"
  }'
▌

FAQ

Common questions.
About connectors.

Something not covered here? A data engineer can walk through your setup with you.

Put your Fortnox data to work.

Connect Fortnox, pick a warehouse, and your agents can query it today. Free for 14 days, no credit card.

Fortnox

Source

Weld

MCPAgents

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