RSA Helper — manual
XAdES signing, KSeF certificates, invoice conversion and QR codes.
Downloads
Documentation available without signing in. Builds prepared for a specific deployment are in the client area.
Manuals
Documentation — readable before you commit to anything, no account required.
RSA Helper — Docker & Podman setup
Running the service in a container — step by step, for Docker and Podman.
JPK Certificate Service — manual
Installing and configuring the local signing service used by the browser version of JPK WysyłkaXML.
WhiteListChecker — manual
Verifying tax IDs and bank accounts against the Polish VAT taxpayer whitelist, with a daily MF flat-file refresh.
WhiteListChecker — Docker & Podman setup
Running the service in a container — step by step, for Docker and Podman.
NipService — manual
Checking Polish tax IDs against the MF whitelist and EU VAT numbers in VIES — a REST API for ERP integration.
NipService — Docker & Podman setup
Running the service in a container — step by step, for Docker and Podman, on Linux and Windows.
Tools
Publicly available installers.
JPK Certificate Service
Local service required for signing SAF-T (JPK) files when using the browser version of JPK WysyłkaXML.
RSA Helper Certificate Downloader
Application for downloading required certificates for offline mode of RSA Helper
Buttons marked PL or EN indicate the language of the document itself. The download endpoint is
shared between both versions of this site — there is one allow-list of public files, and it
lives in src/data/pliki.ts.