KSeF 2.0 .NET (C#) – Integration Library

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  • Version 2.0.2
  • Download 681
  • File Size 750.8 KB
  • File Count 1
  • Create Date June 17, 2025
  • Last Updated March 22, 2026

KSeF 2.0 .NET (C#) - integration library

.NET Client Library (C#) for KSeF 2.0 REST API

Integration library written in JAVA that allows integration with National e-Invoice System - KSeF 2.0 REST API. The ZIP package contains the library, source code, data model, and error return codes. Implementation details, along with sequence diagrams describing the order in which individual operations are called, are described on the website. Documentation.

Source code: Github

Nuget package: Nuget

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