National e-Invoice System (KSeF 2.0) – new .NET client library (C#) We are pleased to announce that we have made another client library available on our website and in public repositories, this time for the .NET framework, which facilitates and accelerates the integration of systems and applications with the National e-Invoice System 2.0. These are the final tools Read more…
National e-Invoice System (KSeF 2.0) – new client libraries for PHP and JAVA We are pleased to announce that we have made two updated client libraries for JAVA and PHP available on our websites and in public repositories, which facilitate and accelerate system integration with the National e-Invoice System 2.0. These are further tools after the KSeF interface. Read more…
Dear Sir or Madam, We would like to inform you that we have made it possible to register and create accounts on our website for the KSeF 2.0 test environment. The website enabling registration and account creation: https://ksefapi.pl/portal-test/register Login to the user panel: https://ksefapi.pl/portal-test/login Instructions on how to configure an account and start using the provided API are available at: https://ksefapi.pl/rest-ksef-api-dokumentacja/ Attention! All users who have created accounts Read more…
We would like to inform you that the updated version of the ksefapi.pl interface for the KSeF 2.0 architecture is now available: https://ksefapi.pl/api-test/swagger-ui/index.html#/ We plan to launch registration and account creation on January 12, 2026. KSeF API Team
National e-Invoice System (KSeF) new integration libraries for JAVA and .NET We are very pleased to announce that we have made available two more client libraries for JAVA and .NET languages, which facilitate and accelerate the integration of systems with the National e-Invoice System. These are the next tools after the KSeF REST API interface and the PHP library that we make available Read more…
The current KSeF 2.0 Implementation Plan in Poland – Deadlines, Requirements and Schedule Introduction: Understanding KSeF – What you need to know about the upcoming changes The National e-Invoice System, better known as KSeF, is a revolutionary change in the Polish tax system, introducing the obligation to issue and receive invoices in a structured electronic form via a central platform Read more…
National e-Invoice System (KSeF) new integration library for PHP In addition to the REST API interface, the availability of which we informed you in the previous entry (KSeF REST API), we have prepared a library for the PHP language, which enables integration with our KSeF REST API interface. It is already available for download directly after going to the Download tab. We are working Read more…
KSeF REST API dedicated interface for the National e-Invoice System We would like to inform you that we have made available a REST API interface containing operations allowing for quick and effective integration with the National e-Invoice System (KSeF). The implemented operations enable the implementation of the main functionalities related to the handling of structured invoices in KSeF, i.e.: Generating e-Invoices in the XML format in accordance with Read more…
Summary of KSeF consultations in the area of communication and information exchange In accordance with our earlier announcement regarding the KSeF schedule, as part of consultations on the National e-Invoice System (KSeF), today we will present you a short summary of consultations organized on March 1, 2024 by the Ministry of Finance under the name KSeF Consultations – explanations, interpretations and training. Discussed at the meeting Read more…
Summary of consultations aimed at exchanging information on the possibility of phasing the implementation of the KSeF In accordance with our earlier announcement regarding the KSeF schedule, as part of the consultations regarding the National e-Invoice System (KSeF), today we will present you a short summary of the consultations organized on February 29, 2024 by the Ministry of Finance under called KSeF Consultations - staging of KSeF implementation. While Read more…