Caliper enforces your purchase rules inside Shopify's checkout, server-side, where a shopper cannot skip them: quantity limits, order minimums, packs and multiples, and blocked combinations — scoped by product, variant, collection, customer tag, country or B2B. It also re-checks every completed order and reports the ones that broke your rules after arriving through Point of Sale, subscription renewals, draft orders or the API, where checkout validation cannot stop the order.

• Set quantity, value, pack and combination limits on any cart
• Enforce them at checkout so orders over the limit cannot be placed
• Scope any rule by product, collection, customer tag, country or B2B
• Warn shoppers on product and cart pages before they reach checkout
• See orders that broke a rule via point of sale, subscriptions or the API