Here you can find all OAS files (OpenAPI Specification) files to download:
- Debtor API
- Billing API
- Usage API
- Data Access API
- Tax API
- Payment API
- Bookkeeping API
- Invoice API
- Document Output API
- Notification API
- Report API
API version & release tag
The OpenAPI Specification provided here is our stable and productive API v2.
Every OAS file available refers to this version as
v2, suffixed by a release tag indicating ongoing changes to that specific OAS file (e.g.v2-1.1.0). The release tag does not express any degree of API change but is an indicator for an update only as all changes are anyhow implemented backwards-compatible within that API version v2.Please check our Changelog for any changes and our API Migration Guide as well.