ARCHIVED — discontinued and unmaintained since 24 August 2026. Final frozen release: v2.1.0.
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.
Live JSON samples and schema for the Poland KSeF FA(3) preflight validator API.
Tamper-evidence toolkit (npm verifyhash / verify-vh) + a zero-dependency EN 16931 / XRechnung / Factur-X e-invoice validator. Offline, permissionless, CI-gateable.
Validate EN 16931 e-invoices (UBL, CII, Factur-X PDF) in CI. Runs locally by default — no API key, no network.
XRechnung, ZUGFeRD, and Factur-X validation sample JSON, pinned-rule evidence, and a JSON Schema.
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.
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
EN 16931 Toolkit: Go CLI for validating invoices against the EN 16931:2017 e-invoicing standard and rendering UBL 2.1 XML.
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