May 2026
New endpoints:
Buchhaltungsbutler
DATEV Unternehmen Online
Lexware Office
Microsoft Business Central
- POST /bookingProposals
- GET /invoices/:id/lineItems
- GET /invoices/:id/lineItems/:id
- POST /invoices/:id/lineItems
- PATCH /invoices/:id/lineItems
Sage active
- GET /journalEntries/:id/attachments
- GET /journalEntries/:id/attachments:id
- POST /journalEntries/:id/attachments
sevdesk
April 2026