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Show cart-aware “You may also like” cross-sell suggestions on your WHMCS order form. Admins link products with simple rules, and customers add them through the normal, fully-validated cart flow — with no changes to WHMCS's order form.
Cart-aware cross-sells that customers add through WHMCS's own validated checkout — no hacks, no core order form edits.
Admins link cross-sell products with simple rules; the addon reads the live cart and shows the ones that match, right on the order form.
Create rules under Products/Services → Cross Sales. Each rule triggers on a specific product in the cart, any product from a chosen group, or any non-empty cart — then lists the cross-sell products to offer.
On the cart and configuration pages, the addon reads the current cart, matches your rules, and renders a clean suggestion widget with the linked products and their prices.
Per rule, offer the cross-sell as a suggestion the customer can add, or auto-include it as a forced bundle at checkout automatically.
The widget is injected through WHMCS's hook system — the same integration point WHMCS's own order form uses — so no core order form files are ever modified.
Each cross-sell's Add to order button links to WHMCS's standard configure step, so items are added through the normal, fully-validated cart flow — no CSRF or endpoint hacks.
A cross-sell only shows if it has pricing in the cart's active currency. Optional per-rule badge labels (e.g. “Save 20%”) highlight offers, while the price charged is always the product's normal pricing.
Under Products/Services → Cross Sales, staff create rules. Each rule has a trigger and a list of cross-sell products to offer when that trigger matches the customer's current cart.
Three: show the cross-sells when a specific product is in the cart, when any product from a chosen group is in the cart, or whenever the cart is simply non-empty.
Suggest (the default) shows the cross-sell as an option the customer can add. Auto-include automatically adds it to the order at checkout as a forced bundle — use it with care, since forced items bypass the order form's item validation.
No. The widget is injected through WHMCS's hook system — the same upgrade-safe integration point WHMCS's own order form uses — so no core order form files are touched. Updates stay clean.
Yes. A cross-sell is only shown if it has pricing in the cart's active currency, and it's added through WHMCS's standard configure step so the normal cart validation applies. Discounts are display-only badges — the price charged is always the product's normal pricing.
The order form must have the relevant product groups assigned, and a cross-sell product is only addable on a given order form if one of its product groups is assigned to that form (the addon skips suggestions it can't actually add). Built for current WHMCS versions.
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