facturx-toolkit

InvoiceXML brings e-invoice compliance to your AI agent. Create, validate, convert, render, and extract structured invoices across UBL (Peppol BIS Billing 3.0, used worldwide), CII, Factur-X, ZUGFeRD, and XRechnung, all checked against the EN 16931 standard and official Schematron rules. Ask your assistant to generate a compliant invoice, validate one for errors, or convert between formats, with n

Validates EU electronic invoices (Peppol, XRechnung, FatturaPA, etc.) and explains validation error codes, enabling AI coding agents to check invoice validity and get fixes before rejection.

Enables AI assistants to locally parse, validate, audit, explain, generate, and convert XRechnung and ZUGFeRD/Factur-X e-invoices using official rule sets, fully offline with no API keys required.

EU e-invoice validation, as a developer API. Check whether an electronic invoice conforms to EN 16931 — the European standard behind France, Germany, Belgium, Poland and the 2030 ViDA mandate — with a single REST call. Structured JSON errors mapped to the official BR-* business rules. No enterprise sales call required.