Developer portal
The API reference now lives here, generated straight from the OpenAPI specification — so what you read is what the API actually accepts and returns, across all 86 endpoints and 37 countries.
What you get:
- Searchable reference for every endpoint, with request and response schemas
- Real examples on the parse endpoints — round-trippable documents you can send as-is
- Try it directly from the page, with your own API key
- Quickstart that reads a German XRechnung end to end
The specification stays available at
/openapi-full.json if you would rather
generate a client yourself.