Fortnox integration connects your internal systems directly to the Fortnox cloud accounting platform via its RESTful API. You automate key finance and administration tasks—like creating invoices, registering payments, importing bank transactions, posting purchase invoices, running payroll journals and generating financial reports—eliminating manual entry and minimizing errors.

Our solution covers sales invoicing, accounts receivable, purchase invoicing, accounts payable, bank reconciliation, payroll, time reporting, inventory valuation and financial reporting modules. You choose only the modules you need, so whether you’re automating e-commerce orders or back-office payroll, you get exactly the capabilities your business requires.

Typical Fortnox integrations take 3–5 weeks from kickoff to go-live. We start with a requirements workshop to map your chart of accounts, VAT settings and invoice layouts. Then we develop the integration layers—authentication, invoice creation, payment posting and report exports. After thorough QA and user acceptance testing, we deploy to production and hand over documentation and training.

To begin, you’ll need a Fortnox developer account and API credentials (client ID/secret). We’ll also ask for your chart of accounts mapping, VAT codes, payment terms, and invoice PDF template/logo. If you plan to automate payroll, share your salary rules, employee data fields and time-reporting setup. With this information we can configure sandbox access and start development immediately.

Fortnox’s Sales Invoice API lets you submit complete invoice data—including customer number, invoice rows, VAT rates and due dates—in a single POST. Fortnox returns the created invoice number and a link to the PDF. You can then:

• trigger payment reminders
• email the PDF to customers
• push the invoice into your ERP

Yes—using the Bank Transactions API, you import your daily bank statement transactions into Fortnox. Our integration can then match incoming payments to open invoices automatically, create payment entries, and flag any discrepancies for review. You get a fully reconciled ledger without manual bank imports.

Fortnox offers a dedicated sandbox environment at separate API endpoints, where you can safely test all your workflows using dummy or masked production data. To begin:

1. Request a Developer Account

Register on Fortnox’s developer portal to get a sandbox client ID and secret.

2. Configure Environment Variables

Store your sandbox credentials and base URLs (e.g., `https://api.fortnox.se/sandbox/v1/`) in a secure vault or config file.

3. Implement & Test

Write unit tests for each endpoint (SalesInvoice, PurchaseInvoice, BankTransaction, Payroll, Reports) and run integration tests to validate end-to-end flows.

4. Load & Rate-Limit Tests

Simulate high-volume scenarios to ensure your queuing and backoff logic respects the 25 calls/5 seconds cap.

Once your QA team signs off, swap your base URLs and credentials for production, and launch without redeploying code.

Absolutely. Once your integration is production-ready, we assist with:

1. Certification

Prepare your app package, security whitepaper, API scopes and test scripts.

2. Marketplace Listing

Draft SEO-optimized descriptions, set up screenshots and demo videos.

3. Billing Integration

Configure subscription tiers (monthly, per user, usage-based) and webhooks so Fortnox can handle invoicing and revenue sharing.

4. Onboarding Flow

Implement OAuth2 consent screens, redirect URIs and onboarding guides.

After listing, Fortnox customers can discover your app, install it with one click and pay through their existing billing portal—driving recurring revenue for your business.

Fortnox licenses are sold as modular subscriptions. Core modules include:

• Accounting & Invoicing: core bookkeeping, sales invoices, credit notes
• Purchase & Payables: supplier invoices, purchase orders
• Bank & Reconciliation: automatic bank feeds, transaction matching
• Payroll & HR: salary journals, working hours, benefits
• Time & Project Tracking: track consultant hours or project costs
• Inventory & Warehouse: stock valuation, serial number tracking
• Document Management: scan, store and search attachments

We conduct a license audit to identify which subscriptions you already have, recommend upgrades for features like OCR scanning or e-invoicing, and coordinate with Fortnox or your reseller to activate them—ensuring your integration can leverage every API endpoint you need.

Fortnox’s Payroll API allows you to submit employee salary data, working hours, deductions and benefits. Once posted, Fortnox calculates taxes, social fees and generates the complete salary journal. You can then export the payroll journal directly to your general ledger or payroll provider.

The Reports API in Fortnox provides on-demand access to profit & loss statements, balance sheets, VAT summaries and aged receivables/payables. Our integration fetches these reports automatically—daily, weekly or monthly—and stores them in your BI tool or Excel for further analysis.

Fortnox uses OAuth2 for secure API access. You exchange your client ID and secret for a short-lived access token, which you include in each request header. We help you implement token-refresh logic and secure key storage following best practices.

Our integration layers log every API request and response. If an invoice fails or a payment is rejected, we send you an email or Slack alert with error details. You can then correct the issue and reprocess the transaction.

Robust error handling is critical:

1. Structured Logging

Log every request/response pair with timestamps, correlation IDs and full payloads.

2. Error Parsing

Fortnox returns detailed error objects (code, message, field). We parse these and classify them (validation vs. system errors).

3. Automated Alerts

Dispatch email, Slack or Microsoft Teams notifications for critical failures—such as invoice rejections or payroll errors.

4. Retry & Dead-Letter

Apply retry policies for transient errors; push persistent failures to a dead-letter queue for manual review.

5. Dashboard & Metrics

Surface error rates, latency and throughput in Grafana or Power BI to spot trends and preempt outages.

Yes—Fortnox provides separate sandbox and production endpoints. You develop and test your workflows in sandbox mode without affecting real data. Once validated, you switch your API credentials to production for go-live.

Fortnox’s APIs use JSON for requests and responses. We handle serialization and deserialization in your language of choice—Node.js, .NET, PHP or Python—so you always work with native objects in your code.