1. Factur-X as a technical output boundary
Fakturai treats Factur-X as an output format for structured invoice data, not as a complete invoice operations system.
Factur-X API
Factur-X API with public proof
Factur-X matters for teams that need electronic invoices to fit cleanly into European workflows. Fakturai keeps the boundary deliberately small: structured invoice data in, ZUGFeRD / Factur-X output out, technical validation report visible.
This page is for technical evaluators who want to see whether the API approach fits their existing invoice source before booking a call.
Factur-X proof
The public proof uses the same technical standard boundary as ZUGFeRD: ZUGFeRD / Factur-X EN 16931.
The request JSON, PDF and XML are directly accessible. The validation report shows validation_status: passed, KoSIT accept, no hard failures and six advisories from XRechnung and Peppol rules.
Note: Technical format validation does not replace the issuer's responsibility for invoice content, tax treatment, or archival. Fakturai does not make a claim about French tax or reporting obligations.
2. Why the proof matters
Developers can inspect the payload and validation report directly instead of reading only product claims.
3. Cross-border evaluation without promises
The proof helps with technical format evaluation. National reporting, tax and archive questions remain outside this API boundary.
4. Typical use cases
EU SaaS, Franco-German software teams, marketplace billing, agency automation and internal finance-ops workflows.
5. Next step
Open the proof, read the API docs and map your integration path against the sample structure.