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System Connect API

System Connect API provides all you need for a complete connect solution.

Availability

System Connect API is not an open API and it requires that you have an agreement with Aidenhof AB before you start.

Please contact us at info[at]aidenhof.se if you want to know more.

Functionality

System Connect is a unified integration layer that simplifies communication with a growing list of external APIs. Instead of handling each provider’s unique protocols and formats, System Connect standardizes requests and responses into a consistent structure, enabling seamless data exchange and interoperability across systems.

FAQ

Here are some answers to the questions that are asked most.

  • How can I access System Connect API?
    You need to contact Aidenhof in order to get your access keys
  • I've lost my access key? Can I get a new one?
    You need to contact Aidenhof in order to get a new set of access keys
  • Where do I find the documentation?
    The documentation is here
  • What is System Connect?
    System Connect is a unified API gateway that connects your application to multiple accounting systems (Fortnox, Acconomy, BjörnLunden, etc.) through a single, consistent interface. Instead of integrating with each system separately, you make one integration with System Connect.
  • Which accounting systems are supported?
    System Connect currently supports Fortnox, Bokio, Hogia, Acconomy, Kleer (PE Accounting), Speedledger, 24SevenOffice and BjörnLunden. More systems are continuously being added.
  • Do I need to manually refresh OAuth tokens?
    No. System Connect automatically refreshes OAuth tokens before they expire. A CRON job runs every 4 hours to refresh tokens that will expire within 24 hours.
  • Can I upload SIE files instead of using OAuth?
    Yes. For offline systems or file-based workflows, you can upload a SIE file (Base64 encoded) using the /redirect/finalize endpoint with the FileBase64 parameter. This creates a connection without requiring OAuth.
  • How fresh is the data?
    All data is fetched in real-time directly from the connected accounting system. There is no caching - every API call retrieves the latest data available in the source system.
  • Are there rate limits?
    System Connect respects the rate limits of the underlying accounting systems. For example, Fortnox allows 4 requests per second. System Connect automatically handles throttling and retries.