1. Finding the addon

The Yandex Pay and Split addon is listed under Add-ons → Downloaded add-ons. Use the search box and type “yandex” to filter the list. The addon is by developer make shop; after installation its status is “On” (enabled).

2. Installation

Install the addon via Add-ons → Manage add-ons (upload package or update from repository). After installation, enable the addon and open its settings (gear icon next to the addon name or click the name).

3. Addon settings

3.1. General (tab “General”)

In the addon settings, open the General → General tab:

• Seller ID (Merchant ID) — enter your Merchant ID from the Yandex Pay dashboard (e.g. 5d69c8fa-894c-44c5-b9fa-...).
• Order status mapping — set which order status to use for successful payment (“Successful:” — e.g. “Completed”) and for failed payment (“Unsuccessful:” — e.g. “Cancelled”).

Click Save when done.

3.2. Widget (tab “Settings” → “Widget”)

On Settings → Widget you configure how the payment widget is shown:

• Widget display on product card: extended view, compact view, or “Do not display”.
• Display payment method widget: choose “Yandex Pay and Yandex Split” or the option you need.
• Widget configuration — JSON with widget options (theme, border radius, size, etc.). You can build the config in Yandex’s interactive demo and paste it here (link to the demo is below the field).

Click Save after changes.

3.3. Badge

Under Settings → Badge you set how the “Yandex Pay” badge appears on the storefront (position, visibility). Save after editing.

4. Adding a payment method

To let customers pay with Yandex Pay or Split, add a payment method:

1. Go to Add-ons → Payment methods (or Administration → Payment methods, depending on your CS-Cart version).
2. Click + Add payment method.
3. Select processor MS: Yandex Pay (or the Yandex Pay / Split option shown in your list).
4. Fill in the name, description; optionally limit storefronts and shipping methods.
5. In the payment method parameters, enter the data provided by Yandex if required.
6. Enable the payment method and save.

The list will show e.g. “MS: Yandex Pay” with an On/Off switch.

5. Verification

1. Open a product page on the storefront — the Yandex Pay/Split widget should appear if enabled.
2. Add a product to cart and go to checkout — select Yandex Pay as payment method and confirm the widget appears and payment works (use test mode first if available).

6. Maintenance

• Updating: via Add-ons → Manage add-ons (when an update is available) or by installing a new version from the repository.
• Uninstall: in the addon list, disable and remove the addon. Before that, disable or remove related payment methods under Payment methods so orders are not left without a payment option.