fa3

Complete KSeF (Krajowy System e-Faktur) e-invoicing integration for Dolibarr - FA(3) submission, corrections, incoming import, multicurrency. AGPLv3+.

🧾 Free, open-source KSeF FA(3) invoice validator. XSD + semantic rules, runs in the browser. CLI & npm package included.

✨ A curated list of KSeF tools and resources

REST API i usługa Docker do generowania wizualizacji PDF polskich faktur KSeF i dokumentów UPO

Endpoints for KSeF 2.0 API. Cryptography and all needed to develop in Delphi 10+.

FA(3) / KSeF structured invoice validator — every rule cites its source, every finding explains how to fix it

Auto-issue Polish KSeF FA(3) e-invoices after every successful Stripe payment. / Automatyczne faktury KSeF po płatności Stripe.

Official PHP SDK for the NaprawKSeF API (KSeF, FA(3), webhooks). Zero runtime dependencies, PSR-18 compatible.

Claude Code skill: build KSeF API 2.0 integrations (Krajowy System e-Faktur, Poland's national e-invoicing) — KSeF-token auth, AES/RSA invoice encryption, interactive and batch sending, UPO receipts, purchase-invoice sync, QR codes — in Next.js App Router on Vercel

Odoo 17 KSeF 2.0 e-invoicing integration — FA(3) XML, VAT Marża, UPO (Polish e-invoice system)

Spring-Boot-first Java client for Poland's KSeF 2.0 e-invoicing (FA(3)): send, read, and UPO handling, with a published test mock. Apache-2.0, on Maven Central.

Wystawianie powtarzalnych faktur sprzedażowych w KSeF (API 2.0, FA(3)) z CLI — profil + miesiąc + kwota netto i faktura jest w KSeF, z UPO i archiwum lokalnie.

Rust KSeF integration — send, receive and manage Polish e-invoices (FA3) via KSeF API v2.0. Axum dashboard for solo/micro-businesses.

REST API i usługa Docker do generowania wizualizacji PDF polskich faktur KSeF i dokumentów UPO

Offline FA(3) / KSeF e-invoice validator — 128 rules, bilingual reports, runs locally. Windows GUI + Linux CLI. Free tier + paid.

Zero-dependency TypeScript validation for Polish invoices before KSeF submission: NIP checksum, date sanity and net + VAT = gross consistency.

Poland KSeF FA invoice generator sample inputs, validated outputs, Dataset schema, and KSeF submission boundaries for the Apify Actor.

KSeF adapter for the madcoders Sylius e-invoicing plugin - submits FA(3) e-invoices to the Polish national e-invoicing system