# Fortnox — Accounting API: overview > Canonical URL: https://developers.apideck.com/apis/accounting/fortnox/overview Fortnox is the leading Swedish SMB cloud accounting and ERP platform — invoicing, supplier-invoice management, bookkeeping, payments, and reporting for small and mid-sized Swedish businesses. - Status: beta - Authentication: oauth2 - **account type required:** Any Fortnox account with licences for the modules in the requested scopes. - **apideck credentials available:** true - **apideck credentials note:** OAuth consent shows Apideck; register your own integration only for custom branding. - **authentication note:** Authorization Code flow with 12 scopes. - **beta:** true - **consumer access level:** System administrator — a restricted-role user must first be granted access covering all requested scopes. - **costs:** No documented developer or API-access fee. Your consumers pay for their own Fortnox licences. - **difficulty:** straightforward - **difficulty reason:** Self-Service OAuth + Free Test Databases — No Partnership or App Review Required - **environment notes:** - **description:** Test environments are created and removed in the Fortnox Developer Portal (up to 30 at a time) and are administered like any other Fortnox company. Apideck holds a single set of Fortnox credentials, so a connection is distinguished by which company the consumer authorizes rather than by a separate sandbox key. - **environment:** Testing - **description:** Because credentials are shared across environments, a connection points at whichever Fortnox company the consumer authorizes. Confirm the intended company before running mutations — writes reach real bookkeeping data immediately. - **environment:** Production - **external guides:** - **source:** Fortnox - **title:** Get started with the Developer Portal - **url:** https://support.fortnox.se/kom-igang/integrationer/kom-igang-med-utvecklarportalen - **source:** Fortnox - **title:** Authorization (OAuth 2.0) - **url:** https://www.fortnox.se/developer/authorization - **source:** Fortnox - **title:** Rate limits for the Fortnox API - **url:** https://www.fortnox.se/developer/guides-and-good-to-know/rate-limits-for-fortnox-api - **source:** Fortnox - **title:** Pricing models for published integrations - **url:** https://www.fortnox.se/developer/guides-and-good-to-know/pricing-models - **source:** Fortnox - **title:** Fortnox API reference - **url:** https://developer.fortnox.se/documentation/ - **important to know:** Journal entries are immutable once posted (correct with a balancing voucher). Listing them fetches each voucher's line items individually to fill in the response, so large result sets are slower than other list endpoints. Invoices and bills are cancelled rather than deleted; suppliers and ledger accounts are deactivated. Attachments only auto-link for bills and vouchers. For invoices, purchase orders and offers, uploaded files land in a Fortnox inbox and a Fortnox user must attach them manually from the document view. Credit notes cannot be created standalone — each one must be raised against an already-booked customer invoice. Ledger accounts and journal entries are scoped to a financial year — a financialyear parameter decides which year of records comes back. A connection left completely idle for 45+ days lapses — Fortnox refresh tokens expire on that clock, and the consumer has to reauthorize to restore it. - **partnership note:** Publishing in the Fortnox marketplace needs an approved integration partner agreement; the free Developer Portal and its test companies need no partnership. - **partnership required:** false - **rate limits:** 300 requests/minute per client id and tenant, enforced as a 5-second sliding window (effectively 25 requests per 5 seconds). Exceeding it returns HTTP 429. - **responsibility matrix:** - **area:** Get Developer Portal access (self-service signup, or support ticket on an existing account) - **customer:** ✓ (only when using your own credentials) - **apideck:** Docs provided - **area:** Create & Configure Fortnox Integration - **customer:** ✓ (optional — Apideck credentials available) - **area:** Add Credentials to Apideck - **customer:** ✓ (only when using your own credentials) - **apideck:** Handles OAuth flow - **area:** Authorize Connection (OAuth) - **consumer:** ✓ - **apideck:** Maintains connector - **area:** Build via Unified API - **customer:** ✓ - **apideck:** ✓ Automatic - **area:** Token Refresh - **apideck:** Logs & alerts - **area:** Monitor Connections - **consumer:** ✓ Can revoke anytime - **customer:** ✓ Via Apideck Dashboard - **sandbox available:** true - **sandbox note:** Up to 30 free test databases via the Developer Portal. - **sandbox url:** https://www.fortnox.se/developer/developer-portal - **supported resource categories:** - **name:** Core Financial - **resources:** ledger-accounts journal-entries tax-rates bank-accounts company-info - **name:** Accounts Receivable - **resources:** invoices invoice-items customers payments credit-notes sales-orders - **name:** Accounts Payable - **resources:** bills bill-payments suppliers purchase-orders - **name:** Other - **resources:** attachments tracking-categories - **webhooks:** Virtual webhooks — created and updated events for invoices, customers, suppliers, bills, ledger accounts and payments. ## Supported resources [Accounting data model](/guides/accounting-data-model.md) - **custom field support:** true - **downstream id:** invoices - **downstream name:** Invoices - **id:** invoices - **name:** Invoices - **status:** live - **custom field support:** true - **downstream id:** customers - **downstream name:** Customers - **id:** customers - **name:** Customers - **status:** live - **custom field support:** true - **downstream id:** suppliers - **downstream name:** Suppliers - **id:** suppliers - **name:** Suppliers - **status:** live - **custom field support:** true - **downstream id:** supplier-invoices - **downstream name:** Supplier Invoices - **id:** bills - **name:** Bills - **status:** live - **custom field support:** true - **downstream id:** accounts - **downstream name:** Accounts - **id:** ledger-accounts - **name:** Ledger Accounts - **status:** live - **custom field support:** false - **downstream id:** voucher-series - **downstream name:** Voucher Series - **id:** journals - **name:** Journals - **status:** beta - **custom field support:** false - **downstream id:** fiscal-periods - **downstream name:** Fiscal Periods - **id:** fiscal-periods - **name:** Fiscal Periods - **status:** beta - **custom field support:** true - **downstream id:** vouchers - **downstream name:** Vouchers - **id:** journal-entries - **name:** Journal Entries - **status:** live - **custom field support:** true - **downstream id:** invoice-payments - **downstream name:** Invoice Payments - **id:** payments - **name:** Payments - **status:** live - **custom field support:** true - **downstream id:** articles - **downstream name:** Articles - **id:** invoice-items - **name:** Invoice Items - **status:** live - **custom field support:** false - **downstream id:** company-information - **downstream name:** Company Information - **id:** company-info - **name:** Company Info - **status:** live - **custom field support:** false - **downstream id:** invoices-credit - **downstream name:** Invoices Credit - **id:** credit-notes - **name:** Credit Notes - **status:** live - **custom field support:** false - **downstream id:** supplier-invoice-payments - **downstream name:** Supplier Invoice Payments - **id:** bill-payments - **name:** Bill Payments - **status:** live - **custom field support:** false - **downstream id:** accounts-bank - **downstream name:** Accounts Bank - **id:** bank-accounts - **name:** Bank Accounts - **status:** beta - **custom field support:** false - **downstream id:** tax-rates - **downstream name:** Tax Rates - **id:** tax-rates - **name:** Tax Rates - **status:** live - **custom field support:** false - **downstream id:** purchase-orders - **downstream name:** Purchase Orders - **id:** purchase-orders - **name:** Purchase Orders - **status:** live - **custom field support:** true - **downstream id:** sales-orders - **downstream name:** Sales Orders - **id:** sales-orders - **name:** Sales Orders - **status:** beta - **custom field support:** false - **downstream id:** attachments - **downstream name:** Attachments - **id:** attachments - **name:** Attachments - **status:** live - **custom field support:** false - **downstream id:** projects - **downstream name:** Projects - **id:** tracking-categories - **name:** Tracking Categories - **status:** live An omitted operation list does not establish operation support. Verify the selected operation in the coverage matrix. [API reference](https://developers.apideck.com/apis/accounting/reference.md) · [Coverage matrix](https://developers.apideck.com/apis/accounting/coverage)