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.

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.

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

Agent Skill: build KSeF API 2.0 integrations (Krajowy System e-Faktur, Poland's national e-invoicing) — KSeF-token auth, AES-256/RSA-OAEP invoice encryption, interactive and batch sending, UPO receipts, purchase-invoice sync, KOD I/II 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)

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.

WebMCP Challenge lab for browser-local, human-reviewed validation of official Polish public XML/XSD artifacts.

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.

KSeF invoice generator for Poland FA(3), also called FA3. Convert structured JSON into invoice XML, then run the pinned official schema and deterministic offline technical checks. Return generated files and findings; KSeF submission is separate.

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