# 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), and listing them is slower than other endpoints because each voucher's lines are fetched separately. 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. Developer signup verifies your Fortnox ID with a Swedish e-ID. Developers without one cannot finish signup on their own: Fortnox developer support verifies them manually from a photo ID, so plan for that extra step before you can create test companies. 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)