We build and run SaaS integrations for companies in Germany, Austria and Switzerland: shops, payment providers, ERPs and HR tools connected to DATEV, Lexware Office, sevDesk and the rest of the DACH stack. Cloud-native, fully EU-hosted, and operated by us after go-live.
Wir bauen und betreiben SaaS-Schnittstellen für Unternehmen im DACH-Raum, vollständig in der EU gehostet.
| Project | What it does |
|---|---|
| datev-extf | Validate and write DATEV-Format (EXTF) files in TypeScript. Checks Buchungsstapel and Debitoren/Kreditoren line by line, with explanations in German and English. npm |
| datev-extf-mcp | MCP server for the same checks: ask Claude, Cursor or any MCP client why DATEV rejects an import, or have it write a Buchungsstapel. Runs locally, files never leave your machine. npm |
| leitweg-id | Validate, parse and build Leitweg-IDs for XRechnung, plus USt-IdNr, W-IdNr and SEPA Gläubiger-ID, with error messages in German and English. Zero dependencies. npm |
We publish the pieces we maintain for our own production pipelines anyway. Issues and PRs are welcome, but there's no SLA.
Browser tools for DATEV bookkeeping. Files and inputs never leave your browser.
- DATEV EXTF validator: find out why DATEV rejects an import file, line by line
- PayPal and Stripe to DATEV: turn a payout export into a Buchungsstapel
- DATEV tax key finder: revenue account and BU-Schlüssel for domestic, EU and export sales
- SKR03 ↔ SKR04 lookup: the counterpart of common accounts in the other chart