PL · PLN · clearance

Developer integration

Formaty e-faktur, identyfikatory, zasady, terminy i bezpłatne narzędzia techniczne dla kraju: Polska. FA(3) XML. Kontrola techniczna nie gwarantuje przyjęcia przez urząd skarbowy ani platformę odbiorczą.

mandatoryP0Reviewed 2026-08-02
Developer integration

Connect software to KSeF FA(3)

Build a country adapter around a canonical invoice model. Keep credentials, signing, authority transport and protected lookups in a secure backend rather than browser code.

Relevant authority and network connectors

public-lookup

Peppol Directory and capability discovery

network-discovery · Public directory; full SMP discovery varies by service

  • Participant search
  • Document capability discovery
  • Endpoint metadata routing
Official connector source
credential-required

Poland KSeF

clearance · KSeF authentication token, certificate or supported authorization flow

  • Invoice submission
  • UPO receipt
  • Status query
  • Schema and session handling
Official connector source