The e-invoicing middleware sits between the ERP system and DATEV: documents go in, a posting batch comes out. It processes structured invoices in the XRechnung and ZUGFeRD formats, assigns accounts through a configurable posting matrix and hands the result to DATEV bidirectionally, via Desktop API and REST, GoBD-compliant and multi-client.
It is in development, and I build it myself. That is why there is no open self-service access: what runs today I show in an appointment, against a concrete example. The implemented logic is already documented openly in two whitepapers, which you can read without booking anything.
What the middleware does
- Documents in, posting batches outIncoming documents are processed and handed to DATEV as a posting batch; the path from document to posting runs without retyping.
- XRechnung & ZUGFeRDProcessing of structured invoices in the two formats that govern the German e-invoicing mandate.
- Bidirectional DATEV integrationConnected via Desktop API and REST, in both directions.
- GoBD-compliant and multi-clientBuilt for the GoBD requirements, with several clients kept cleanly separated.
- Configurable posting matrixThe account assignment rules live in a table, not in the code. Four attributes determine the account.recipient country×invoice type×tax rate×cost type→account
- AI-assisted pre-assignmentPosting suggestions that your accounting team reviews and approves. The decision stays with accounting.
How these building blocks work together in a consulting project, with or without the middleware, is covered under E-Invoicing & DATEV. The posting rules themselves are described in detail on the page about account assignment & posting matrix.
Demo on request
A demo runs as an appointment, not as an access link. We walk through the document flow together, I show the posting matrix and the pre-assignment on an example, and you get to ask the questions that matter for your own setup: which ERP, which chart of accounts, which edge cases.
On pricing and on a date for general availability I say nothing as long as neither is settled.