Jurisdiction
Poland
Poland is the rare case where the tax authority itself ships open source: the Ministry of Finance publishes official KSeF API tooling on GitHub, alongside community clients. With mandatory KSeF e-invoicing arriving in 2026, this ecosystem is about to matter to every business in Poland.
What's missing
Building it? SubmitHigher-level integrations — the API layer is covered, but open ERP connectors and validation tooling for the KSeF 2.0 schema are still thin.
2 projects tagged Poland, ranked by community stars.
UncategorizedActive
ksef-api
CIRFMF/ksef-api
UncategorizedActive
ksef-php-client
N1ebieski/ksef-php-client
PHP API client that allows you to interact with the KSEF API Krajowy System e-Faktur