invoice-validation

The self-hosted translation layer between your ERP and e-invoicing. Ingest, validate, and normalize Factur-X, UBL, and CII into usable JSON — or generate compliant XML from your business data.

Validate German e-invoices (XRechnung UBL/CII, ZUGFeRD/Factur-X) against the official KoSIT rule set. Zero-dependency TypeScript client for normapi.de

EN 16931 e-invoice validator and generator for TypeScript. XRechnung, Peppol BIS, Factur-X, UBL and CII. Zero deps.

Live JSON samples and schema for the Peppol BIS Billing preflight validator API.

XRechnung, ZUGFeRD, and Factur-X validation sample JSON, pinned-rule evidence, and a JSON Schema.

AI-powered n8n invoice compliance workflow that extracts invoice data with Groq Llama 3.3, validates purchase orders and tax rules using Google Sheets and Notion, logs audit records, archives approved invoices to Google Drive, and sends Slack and Gmail notifications. Automate AP, invoice validation, and compliance.

Validate EN 16931 e-invoices (UBL, CII, Factur-X PDF) in CI. Runs locally by default — no API key, no network.

Tamper-evidence toolkit (npm verifyhash / verify-vh) + a zero-dependency EN 16931 / XRechnung / Factur-X e-invoice validator. Offline, permissionless, CI-gateable.

Live JSON samples and schema for the Poland KSeF FA(3) preflight validator API.

Live JSON samples and schema for the France e-invoice UBL, CII, and Factur-X validator API.

Public research, benchmarks and production evidence for Einvoi e-invoice verification.

EN 16931 e-invoice validation and generation for UBL and CII, with national CIUS profiles (Croatia, Fiskalizacija 2.0) and rule messages in Croatian, Bosnian and Serbian.

Live JSON samples and schema for the Italy FatturaPA FPA12, FPR12, and FSM10 validator API.

Public demonstration of deterministic invoice validation for ERP and finance systems.

Invoice-vs-brief scope validation — 9 automated checks for multi-supplier translation PM. Live demo: zooman33.github.io/scopeguard

Release-preview JSON samples, CIUS-RO validation evidence, and Dataset schema for the private Romania e-Factura validator Actor.

EN 16931 Toolkit: Go CLI for validating invoices against the EN 16931:2017 e-invoicing standard and rendering UBL 2.1 XML.