Built forCS-CartAdd-ons for CS-Cart & Multi-Vendor, from an independent developer

Przelewy24 Payments (BLIK, Pay-by-link, cards)

by Kavio Labs · for CS-Cart & Multi-Vendor

Take BLIK, pay-by-link bank transfers and cards through Przelewy24, with signed notifications confirmed by transaction verify and refunds from the order page.

Tested on 2 builds Updated Nov 6, 2026 Version 1.0.0 CS-Cart, Multi-Vendor 4.17.2 – 4.21.x No core file edits
Built forCS-Cart

What it does

Przelewy24 for Polish and Central European stores on CS-Cart and Multi-Vendor. Customers pay on the Przelewy24 hosted page with the methods of your account: BLIK, bank transfers, cards and more. Card and bank data never reach your server. Currencies PLN, EUR, GBP and CZK.

Built on the public Przelewy24 REST API. You need a Przelewy24 merchant account; Przelewy24 charges its own fees. This add-on is made by Kavio Labs and is not affiliated with or endorsed by Przelewy24; Przelewy24 and BLIK are trademarks of their owners.

What it changes for your store

  • Every notification is signature checked and confirmed with the mandatory verify call, so unconfirmed payments are never settled by accident.
  • An order counts as paid only when amount and currency match.
  • Repeated notifications change an order one time.
  • A lost notification is recovered when the customer returns or by the recurring check.
  • Refunds from the order page, full or partial, with the result reported by Przelewy24.
  • Failed calls retry by themselves and are listed in the log.

How it works

Admin

Enter the POS ID, API key and CRC key of your test account, run Test connection, then add a payment method with the Przelewy24 processor. Choose all methods, BLIK only, cards only or pay-by-link only per payment method. Refund from the order's Przelewy24 tab.

Shopper

Picks Przelewy24 at checkout, pays on the Przelewy24 page and returns to the order.

Marketplace

The owner receives the payments on one Przelewy24 account; vendor payouts stay with Multi-Vendor.

Features

  • Przelewy24 hosted payment page, no card or bank data on your server
  • BLIK, pay-by-link, cards and the other methods enabled on your account
  • One payment method per choice: all methods, BLIK only, cards only or pay-by-link only
  • Signed register request and signed notification (SHA-384 with your CRC key)
  • Mandatory transaction verify after every notification
  • Amount and currency check before an order counts as paid
  • Idempotent notifications and lost-notification recovery
  • Full and partial refunds with refund results from Przelewy24
  • Currencies PLN, EUR, GBP, CZK, other store currencies converted to PLN
  • Order status for paid, failed and canceled payments, never moved backwards
  • Test (sandbox) and live keys stored encrypted, Test connection lists your methods
  • Job queue with retries, log with CSV export
  • Multi-Vendor: payments on the marketplace account, vendor payouts by Multi-Vendor

What you get

Packagekv_przelewy24-1.0.0.zip, installed through Add-ons → Manage add-ons
Updates & support12 months included. Download new versions from your account and install them in Add-ons → Manage add-ons or the Upgrade Center.
License1 production installation. Staging, dev and localhost are free and unlimited. The add-on keeps working after the update period ends. How licensing works
Version
1.0.0
Updated
Nov 6, 2026
CS-Cart
4.17.2 – 4.21.x
Tested on
CS-Cart 4.17.2, Multi-Vendor 4.17.2, a local mock that follows the Przelewy24 REST API documentation
PHP
7.4 – 8.3
Core edits
None
Add-on ID
kv_przelewy24
Developer
Kavio Labs Software Limited

Support

Policy
Bug reports
1 business day
How-to questions
2 business days
Channel
Tickets in your account

Frequently bought together

Add a released add-on to this order and save 15% on it. It uses the same edition and store domain.

Przelewy24 Payments (BLIK, Pay-by-link, cards)This add-on
One Step CheckoutOne page checkout in 1, 2 or 3 columns with a sticky summary, one screen for every field and a safe fallback to the standard checkout.
$69
EU VAT Number Validation & Reverse ChargeChecks EU VAT numbers live in VIES and applies the 0% reverse charge to valid business buyers in other EU countries.
$59
Invoices & Credit NotesSequential invoice numbers, editable invoice and credit note documents, credit notes on refunds, PDF and bulk print.
$59

Buy with confidence

What stands behind your license

  • Tested builds

    This product was tested on these builds. Builds we did not test are not listed.

    • CS-Cart4.17.2
    • Multi-Vendor4.17.2
  • 12 months of updates

    Updates and support are included in the price. The product keeps working afterwards; renewing is optional.

    How licensing works
  • 30-day refund

    If it is not what you expected, tell us within 30 days and we refund the order.

    Refund policy
  • Secure checkout

    Pay by card, Apple Pay or Google Pay on Stripe's secure page. Your card number never reaches our server.

    Ask a pre-sales question

Sold by Kavio Labs Software Limited, registered in England and Wales No. 17532441. About us

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