Factur-X Toolkit — French e-invoice validation API logo

Factur-X Toolkit — French e-invoice validation API

by cedrickoumaUpdated Jun 15, 2026

Validate, parse, repair and generate French Factur-X / EN16931 electronic invoices before the September 2026 B2B mandate.

factur-x
facturx
en16931
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REST + MCP API around the reference ZUGFeRD/Mustangproject validator. Upload a PDF or CII XML and get a full compliance diagnostic (profile detection, errors, warnings). Extract embedded invoice XML to clean JSON. Generate compliant PDF/A-3 Factur-X invoices from plain JSON.