{"id":14,"date":"2023-09-16T19:48:06","date_gmt":"2023-09-16T19:48:06","guid":{"rendered":"http:\/\/ksefapi.pl\/?page_id=14"},"modified":"2025-07-18T15:00:16","modified_gmt":"2025-07-18T13:00:16","slug":"strona-glowna","status":"publish","type":"page","link":"https:\/\/ksefapi.pl\/en\/","title":{"rendered":"home"},"content":{"rendered":"<div class=\"wp-block-cover alignfull is-light hestia-clear-top-padding\"><span aria-hidden=\"true\" class=\"wp-block-cover__background has-white-background-color has-background-dim-100 has-background-dim\"><\/span>\r\n<div class=\"wp-block-cover__inner-container is-layout-flow wp-block-cover-is-layout-flow\">\r\n<div id=\"ez-toc-container\" class=\"ez-toc-v2_0_76 counter-hierarchy ez-toc-counter ez-toc-grey ez-toc-container-direction\">\n<div class=\"ez-toc-title-container\">\n<p class=\"ez-toc-title\" style=\"cursor:inherit\">Contents<\/p>\n<span class=\"ez-toc-title-toggle\"><a href=\"#\" class=\"ez-toc-pull-right ez-toc-btn ez-toc-btn-xs ez-toc-btn-default ez-toc-toggle\" aria-label=\"Toggle Table of Content\"><span class=\"ez-toc-js-icon-con\"><span class=\"\"><span class=\"eztoc-hide\" style=\"display:none;\">Toggle<\/span><span class=\"ez-toc-icon-toggle-span\"><svg style=\"fill: #999;color:#999\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" class=\"list-377408\" width=\"20px\" height=\"20px\" viewbox=\"0 0 24 24\" fill=\"none\"><path d=\"M6 6H4v2h2V6zm14 0H8v2h12V6zM4 11h2v2H4v-2zm16 0H8v2h12v-2zM4 16h2v2H4v-2zm16 0H8v2h12v-2z\" fill=\"currentColor\"><\/path><\/svg><svg style=\"fill: #999;color:#999\" class=\"arrow-unsorted-368013\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"10px\" height=\"10px\" viewbox=\"0 0 24 24\" version=\"1.2\" baseprofile=\"tiny\"><path d=\"M18.2 9.3l-6.2-6.3-6.2 6.3c-.2.2-.3.4-.3.7s.1.5.3.7c.2.2.4.3.7.3h11c.3 0 .5-.1.7-.3.2-.2.3-.5.3-.7s-.1-.5-.3-.7zM5.8 14.7l6.2 6.3 6.2-6.3c.2-.2.3-.5.3-.7s-.1-.5-.3-.7c-.2-.2-.4-.3-.7-.3h-11c-.3 0-.5.1-.7.3-.2.2-.3.5-.3.7s.1.5.3.7z\"\/><\/svg><\/span><\/span><\/span><\/a><\/span><\/div>\n<nav><ul class='ez-toc-list ez-toc-list-level-1' ><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-1\" href=\"https:\/\/ksefapi.pl\/en\/#KSeF_API_funkcje_narzedzia_integracja\" >KSeF API | functions, tools, integration<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-2\" href=\"https:\/\/ksefapi.pl\/en\/#Uprosc_integracje_KSeF_API_i_skup_sie_na_rozwoju_biznesu\" >Simplify KSeF API integration and focus on business growth<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-3\" href=\"https:\/\/ksefapi.pl\/en\/#Dowiedz_sie_wiecej_o_KSeF\" >Find out more about KSeF<\/a><\/li><\/ul><\/nav><\/div>\n<h2 class=\"wp-block-heading has-text-align-center has-text-color\" style=\"color: #3c4858;\"><span class=\"ez-toc-section\" id=\"KSeF_API_funkcje_narzedzia_integracja\"><\/span><a href=\"\/en\/api-ksef-biblioteki-integracja\/\">KSeF API | functions, tools, integration<\/a><span class=\"ez-toc-section-end\"><\/span><\/h2>\r\n<p>&nbsp;<\/p>\r\n\r\n\r\n\r\n\r\n\r\n<div class=\"wp-block-columns container is-layout-flex wp-container-core-columns-is-layout-1 wp-block-columns-is-layout-flex\">\r\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\"><div class=\"wp-block-image\">\r\n<figure class=\"aligncenter size-large\"><a href=\"\/en\/api-ksef-biblioteki-integracja\/\"><img loading=\"lazy\" decoding=\"async\" src=\"http:\/\/ksefapi.pl\/wp-content\/themes\/hestia\/assets\/img\/feat3.png\" alt=\"api ksef\" class=\"alignnone wp-image-72\" width=\"64\" height=\"64\" title=\"invoices\" \/><\/a><\/figure><\/div>\r\n\r\n\r\n<h5 class=\"wp-block-heading has-text-align-center has-text-color\" style=\"color: #3c4858; font-size: 18px;\"><span class=\"HwtZe\" jsaction=\"mouseup:Sxi9L,BR6jm; mousedown:qjlr0e\" jsname=\"jqKxS\" lang=\"en\"><span jsaction=\"agoMJf:PFBcW;MZfLnc:P7O7bd;nt4Alf:pvnm0e,pfE8Hb,PFBcW;B01qod:dJXsye;H1e5u:iXtTIf;lYIUJf:hij5Wb;bmeZHc:iURhpf;Oxj3Xe:qAKMYb,yaf12d\" jsname=\"txFAF\" class=\"jCAhz ChMk0b\" jscontroller=\"Gn4SMb\"><span class=\"ryNqvb\" jsaction=\"click:E6Tfl,GFf3ac,tMZCfe; contextmenu:Nqw7Te,QP7LD; mouseout:Nqw7Te; mouseover:E6Tfl,c2aHje\" jsname=\"W297wb\">API functions and features<br \/><\/span><\/span><\/span><\/h5>\r\n\r\n\r\n\r\n<p class=\"has-text-align-center has-text-color\" style=\"color: #999999; font-size: 14px;\"><span class=\"HwtZe\" jsaction=\"mouseup:Sxi9L,BR6jm; mousedown:qjlr0e\" jsname=\"jqKxS\" lang=\"en\"><span jsaction=\"agoMJf:PFBcW;MZfLnc:P7O7bd;nt4Alf:pvnm0e,pfE8Hb,PFBcW;B01qod:dJXsye;H1e5u:iXtTIf;lYIUJf:hij5Wb;bmeZHc:iURhpf;Oxj3Xe:qAKMYb,yaf12d\" jsname=\"txFAF\" class=\"jCAhz ChMk0b\" jscontroller=\"Gn4SMb\"><span class=\"ryNqvb\" jsaction=\"click:E6Tfl,GFf3ac,tMZCfe; contextmenu:Nqw7Te,QP7LD; mouseout:Nqw7Te; mouseover:E6Tfl,c2aHje\" jsname=\"W297wb\"><span>Check what functions our API for handling structured invoices (KSeF) provides<\/span>.<\/span><\/span><\/span><\/p>\r\n\r\n\r\n\r\n<div style=\"height: 25px;\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\r\n<\/div>\r\n\r\n\r\n\r\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\"><div class=\"wp-block-image\">\r\n<figure class=\"aligncenter size-large\"><a href=\"\/en\/api-ksef-biblioteki-integracja\/\"><img loading=\"lazy\" decoding=\"async\" src=\"http:\/\/ksefapi.pl\/wp-content\/themes\/hestia\/assets\/img\/feat2.png\" alt=\"api ksef\" class=\"alignnone wp-image-71\" width=\"64\" height=\"64\" title=\"invoices\" \/><\/a><\/figure><\/div>\r\n\r\n\r\n<h5 class=\"wp-block-heading has-text-align-center has-text-color\" style=\"color: #3c4858; font-size: 18px;\"><span class=\"HwtZe\" jsaction=\"mouseup:Sxi9L,BR6jm; mousedown:qjlr0e\" jsname=\"jqKxS\" lang=\"en\"><span jsaction=\"agoMJf:PFBcW;MZfLnc:P7O7bd;nt4Alf:pvnm0e,pfE8Hb,PFBcW;B01qod:dJXsye;H1e5u:iXtTIf;lYIUJf:hij5Wb;bmeZHc:iURhpf;Oxj3Xe:qAKMYb,yaf12d\" jsname=\"txFAF\" class=\"jCAhz ChMk0b\" jscontroller=\"Gn4SMb\"><span class=\"ryNqvb\" jsaction=\"click:E6Tfl,GFf3ac,tMZCfe; contextmenu:Nqw7Te,QP7LD; mouseout:Nqw7Te; mouseover:E6Tfl,c2aHje\" jsname=\"W297wb\">Available tools<\/span><\/span><\/span><\/h5>\r\n\r\n\r\n\r\n<p class=\"has-text-align-center has-text-color\" style=\"color: #999999; font-size: 14px;\"><span class=\"HwtZe\" jsaction=\"mouseup:Sxi9L,BR6jm; mousedown:qjlr0e\" jsname=\"jqKxS\" lang=\"en\"><span jsaction=\"agoMJf:PFBcW;MZfLnc:P7O7bd;nt4Alf:pvnm0e,pfE8Hb,PFBcW;B01qod:dJXsye;H1e5u:iXtTIf;lYIUJf:hij5Wb;bmeZHc:iURhpf;Oxj3Xe:qAKMYb,yaf12d\" jsname=\"txFAF\" class=\"jCAhz ChMk0b\" jscontroller=\"Gn4SMb\"><span class=\"ryNqvb\" jsaction=\"click:E6Tfl,GFf3ac,tMZCfe; contextmenu:Nqw7Te,QP7LD; mouseout:Nqw7Te; mouseover:E6Tfl,c2aHje\" jsname=\"W297wb\"><span>We provide our clients with a number of tools that allow them to perform basic tasks related to e-invoicing.<\/span><\/span><\/span><\/span><\/p>\r\n\r\n\r\n\r\n<div style=\"height: 25px;\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\r\n<\/div>\r\n\r\n\r\n\r\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\"><div class=\"wp-block-image\">\r\n<figure class=\"aligncenter size-large\"><a href=\"\/en\/api-ksef-biblioteki-integracja\/\"><img loading=\"lazy\" decoding=\"async\" src=\"http:\/\/ksefapi.pl\/wp-content\/themes\/hestia\/assets\/img\/feat1.png\" alt=\"api ksef\" class=\"alignnone wp-image-70\" width=\"64\" height=\"64\" title=\"invoices\" \/><\/a><\/figure><\/div>\r\n\r\n\r\n<h5 class=\"wp-block-heading has-text-align-center has-text-color\" style=\"color: #3c4858; font-size: 18px;\"><span class=\"HwtZe\" jsaction=\"mouseup:Sxi9L,BR6jm; mousedown:qjlr0e\" jsname=\"jqKxS\" lang=\"en\"><span jsaction=\"agoMJf:PFBcW;MZfLnc:P7O7bd;nt4Alf:pvnm0e,pfE8Hb,PFBcW;B01qod:dJXsye;H1e5u:iXtTIf;lYIUJf:hij5Wb;bmeZHc:iURhpf;Oxj3Xe:qAKMYb,yaf12d\" jsname=\"txFAF\" class=\"jCAhz ChMk0b\" jscontroller=\"Gn4SMb\"><span class=\"ryNqvb\" jsaction=\"click:E6Tfl,GFf3ac,tMZCfe; contextmenu:Nqw7Te,QP7LD; mouseout:Nqw7Te; mouseover:E6Tfl,c2aHje\" jsname=\"W297wb\">Integration methods<br \/><\/span><\/span><\/span><\/h5>\r\n\r\n\r\n\r\n<p class=\"has-text-align-center has-text-color\" style=\"color: #999999; font-size: 14px;\"><span class=\"HwtZe\" jsaction=\"mouseup:Sxi9L,BR6jm; mousedown:qjlr0e\" jsname=\"jqKxS\" lang=\"en\"><span jsaction=\"agoMJf:PFBcW;MZfLnc:P7O7bd;nt4Alf:pvnm0e,pfE8Hb,PFBcW;B01qod:dJXsye;H1e5u:iXtTIf;lYIUJf:hij5Wb;bmeZHc:iURhpf;Oxj3Xe:qAKMYb,yaf12d\" jsname=\"txFAF\" class=\"jCAhz ChMk0b\" jscontroller=\"Gn4SMb\"><span class=\"ryNqvb\" jsaction=\"click:E6Tfl,GFf3ac,tMZCfe; contextmenu:Nqw7Te,QP7LD; mouseout:Nqw7Te; mouseover:E6Tfl,c2aHje\" jsname=\"W297wb\"><span>Choose the best way for you to integrate with KSeF.<\/span><\/span><\/span><\/span><\/p>\r\n\r\n\r\n\r\n\r\n\r\n<div style=\"height: 25px;\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\r\n<\/div>\r\n<\/div>\r\n\r\n<div class=\"wp-block-columns container\">\r\n<div class=\"wp-block-column col-md-5\">\r\n<p>The KSeF API provides the support you need to quickly and effortlessly integrate your system with the National e-Invoice System. Forget about complicated documentation, certificate issues, and costly delays. Gain time and confidence that your business is ready for digital invoices.<\/p>\r\n<h2 style=\"color:#000\"><span class=\"ez-toc-section\" id=\"Uprosc_integracje_KSeF_API_i_skup_sie_na_rozwoju_biznesu\"><\/span>Simplify KSeF API integration and focus on business growth<span class=\"ez-toc-section-end\"><\/span><\/h2>\r\n<p>KSeF API is a solution for companies that value their developers&#039; time and don&#039;t want to incur the high costs of implementing complex solutions themselves. <a href=\"https:\/\/ksefapi.pl\/en\/pobierz-ksef-php-java-net\/\">libraries in PHP, .NET or Java<\/a>, sample implementations, and a consistent REST interface, KSeF API integration becomes truly simple and predictable. Your team doesn&#039;t have to waste weeks analyzing unintuitive XML files, cryptography, or managing PKI.<\/p>\r\n<p>The KSeF API team consists of specialists who have been building and developing APIs for over two decades, providing a deep understanding of what developers and IT departments need. You don&#039;t have to worry about what to do if regulations change, as we handle maintenance, technical support, and all updates. This guarantees your company peace of mind and operational security, regardless of how KSeF API 2.0 evolves.<\/p>\r\n<p>Our service provides not only technology but also <a href=\"https:\/\/ksefapi.pl\/en\/jak-dziala-wsparcie-techniczne-w-ksefapi-pl\/\">professional support<\/a> at every stage, from testing to full maintenance and updates in line with dynamic changes in KSeF. We want you to focus on developing your business, not solving technical problems. That&#039;s why we have prepared a transparent <a href=\"https:\/\/ksefapi.pl\/en\/rest-ksef-api-dokumentacja\/\" target=\"_new\" rel=\"noopener\">KSeF API documentation<\/a> allows you to start working almost immediately.<\/p>\r\n<p>You can now use KSeF API 2.0 in <a href=\"https:\/\/ksefapi.pl\/en\/ksef-cennik-oferta\/\">licensing model<\/a> Tailored to your needs, flexible, and with no hidden costs. This is a viable alternative for any company that wants to be KSeF-ready and ensure everything is operating in compliance with regulations. Choose a proven partner and see for yourself that KSeF API integration can truly be fast, simple, and cost-effective. With us, you&#039;ll avoid mistakes that can cost more than a well-planned implementation.<\/p>\r\n<\/div><\/div>\r\n\t\r\n\r\n<\/div>\r\n<\/div>\r\n<div class=\"wp-block-columns container\">\r\n<div class=\"wp-block-column col-md-5\">\r\n<div style=\"height: 55px;\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\r\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Dowiedz_sie_wiecej_o_KSeF\"><\/span><a href=\"\/en\/blog\/\">Find out more about KSeF<\/a><span class=\"ez-toc-section-end\"><\/span><\/h2>\r\n<p><span>Need more details? Check out ours <\/span><a href=\"\/en\/blog\/\"><strong>blog<\/strong><\/a><span> and full documentation with detailed information on how to use KSeF using the KSeF API tools.<br \/><\/span><\/p>\r\n<p>&nbsp;<\/p>\r\n<\/div>\r\n<\/div>","protected":false},"excerpt":{"rendered":"","protected":false},"author":2,"featured_media":62,"parent":0,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"footnotes":""},"aioseo_notices":[],"_links":{"self":[{"href":"https:\/\/ksefapi.pl\/en\/wp-json\/wp\/v2\/pages\/14"}],"collection":[{"href":"https:\/\/ksefapi.pl\/en\/wp-json\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/ksefapi.pl\/en\/wp-json\/wp\/v2\/types\/page"}],"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=14"}],"version-history":[{"count":31,"href":"https:\/\/ksefapi.pl\/en\/wp-json\/wp\/v2\/pages\/14\/revisions"}],"predecessor-version":[{"id":988,"href":"https:\/\/ksefapi.pl\/en\/wp-json\/wp\/v2\/pages\/14\/revisions\/988"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/ksefapi.pl\/en\/wp-json\/wp\/v2\/media\/62"}],"wp:attachment":[{"href":"https:\/\/ksefapi.pl\/en\/wp-json\/wp\/v2\/media?parent=14"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}