{"id":1078,"date":"2026-02-10T20:34:15","date_gmt":"2026-02-10T19:34:15","guid":{"rendered":"https:\/\/ksefapi.pl\/?p=1078"},"modified":"2026-03-03T14:02:37","modified_gmt":"2026-03-03T13:02:37","slug":"ksef-2-0-biblioteka-integracyjna-dla-net-c-rest-api","status":"publish","type":"post","link":"https:\/\/ksefapi.pl\/en\/ksef-2-0-biblioteka-integracyjna-dla-net-c-rest-api\/","title":{"rendered":"REST API KSeF 2.0 \u2013 Integration Library for .NET (C#)"},"content":{"rendered":"

National e-Invoice System (KSeF 2.0<\/a>) \u2013 new .NET client library (C#)<\/h1>\n

\"KSeF<\/p>\n

We are very pleased to announce that we have made available on our pages<\/a> and in public repositories<\/a>, another client library, this time for the framework .NET<\/strong><\/span><\/strong><\/a>which facilitates and accelerates the integration of systems and applications with National e-Invoice System 2.0<\/a>These are the last tools after the interface.\u00a0<\/span>KSeF 2.0 REST API<\/a><\/strong><\/strong>, and libraries for PHP<\/a><\/strong> and JAVA<\/a><\/strong>that we planned to make available to our customers.<\/p>\n

In order to carry out a smooth integration, we have prepared a detailed\u00a0<\/span>Technical Documentation<\/strong><\/a>\u00a0<\/span>along with a description of the business processes within which the use of individual operations is described. We encourage you to familiarize yourself with the updated description and diagrams for KSeF 2.0.<\/p>\n

.NET version 2.0.1<\/h2>\n

Source codes: https:\/\/github.com\/ksefapi\/ksefapi-cs-client<\/a><\/p>\n

Release package: https:\/\/github.com\/ksefapi\/ksefapi-cs-client\/releases\/download\/2.0.1\/ksefapi-cs-client-2.0.1.zip<\/a><\/p>\n

Nuget repository: https:\/\/www.nuget.org\/packages\/KSEFAPI.KSEFAPIClient<\/a><\/p>\n

 <\/p>","protected":false},"excerpt":{"rendered":"

National e-Invoice System (KSeF 2.0) \u2013 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 simplifies and accelerates the integration of systems and applications with the National e-Invoice System 2.0. These are the final tools [\u2026]<\/p>","protected":false},"author":2,"featured_media":1079,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[37,11,10,41,6],"tags":[],"aioseo_notices":[],"_links":{"self":[{"href":"https:\/\/ksefapi.pl\/en\/wp-json\/wp\/v2\/posts\/1078"}],"collection":[{"href":"https:\/\/ksefapi.pl\/en\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/ksefapi.pl\/en\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/ksefapi.pl\/en\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/ksefapi.pl\/en\/wp-json\/wp\/v2\/comments?post=1078"}],"version-history":[{"count":3,"href":"https:\/\/ksefapi.pl\/en\/wp-json\/wp\/v2\/posts\/1078\/revisions"}],"predecessor-version":[{"id":1089,"href":"https:\/\/ksefapi.pl\/en\/wp-json\/wp\/v2\/posts\/1078\/revisions\/1089"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/ksefapi.pl\/en\/wp-json\/wp\/v2\/media\/1079"}],"wp:attachment":[{"href":"https:\/\/ksefapi.pl\/en\/wp-json\/wp\/v2\/media?parent=1078"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/ksefapi.pl\/en\/wp-json\/wp\/v2\/categories?post=1078"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/ksefapi.pl\/en\/wp-json\/wp\/v2\/tags?post=1078"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}