One click after checkout, at exactly the price you promised.

It runs on development stores until Shopify grants Offer Suite post-purchase access for live stores.

A placement puts one option of an ordinary offer on the store's post-purchase page, with a priority and rules. The page shows one offer: the first active placement, by priority, whose rules all hold for this purchase and that can be sold to this buyer. Up to three are tried.

• Your agent manages placements through the API and MCP: create_upsell_placement, list_upsell_placements, update_upsell_placement and archive_upsell_placement.
• A placement is active, paused or archived, never deleted. Archiving takes it off the page at once; its views and accepts keep naming it.

Traffic rules read what the buyer's own browser recorded. They route, they are not secret: never use one to gate a price you would not give anyone.

Offer Suite's discount function and cart transform never run on lines added after the purchase. So the API prices the option with the same margin engine as everything else and signs the change Shopify applies: each line at its catalog price with one explicit discount, titled with the option's name, that brings it to exactly the option's price. The signature follows Shopify's own post-purchase protocol.

• Checked twice before anyone sees it. When a placement is saved, and again before every page is shown, on the version served at that moment, the signed change must charge the option's promise to the cent.
• Checked against Shopify. The page asks Shopify to calculate the change and shows the offer only when Shopify charges exactly the offer's cents. Anything else, and the buyer goes straight to the thank-you page.
• One price per view. The page asks twice while it loads and gets the same view and the same cents both times; if the served version changed in between, it shows nothing rather than a second price.
• In the buyer's currency. Prices are in the checkout's currency; an offer whose market currency is another is not shown, never converted.

An accepted upsell reaches the order as a Shopify order edit. When that edit arrives, the added line is matched to the signed accept and booked to the upsell's offer, option and version, with the order's own offer kept beside it. A signed accept that Shopify then refused is never counted: only an applied accept is a sale.

Upsells another app sells are costed too: once paid, any line an order edit adds is a costed line of the order, counted toward the order's offer. The simulator adds what the page is expected to add to a first order, observed or as you assume it, kept apart from the per-order figures. Read it all on profit.

It runs on development stores until Shopify grants Offer Suite post-purchase access for live stores.

An offer on the post-purchase page can run an experiment like any other offer: each checkout is assigned an arm, and the report compares the arms on profit per view, the contribution of the accepts over every checkout shown that arm. An upsell that sells less often at a higher margin can earn more per buyer shown. See experiments.

The post-purchase extension ships inside the Offer Suite app. The merchant chooses Offer Suite under Settings, Checkout, Post-purchase page in the Shopify admin; Shopify gives that page to one app per store. Until a placement matches, the page shows nothing and the buyer goes straight to the thank-you page.

Shopify keeps post-purchase extensions in beta: they run without restriction on development stores, and a live store needs access that the app requests from Shopify. Offer Suite does not have that access yet, so today it runs on development stores only.

• Live stores wait on Shopify's post-purchase access; the upsell runs on development stores until it is granted. Partly available
• Shopify shows the post-purchase page only for some payments: cards and Shop Pay. Wallets such as Apple Pay, Google Pay and PayPal, buy-now-pay-later, gift cards and gateways that keep the card's security code skip it.
• One offer per page: no second offer after a decline yet.
• No thank-you page or order status page offers.
• Subscription lines, options that promise free shipping and discounted lines of more than one unit are not shown.
• Shipping on the added line follows the store's rates; an option cannot promise free shipping after the purchase.
• Placements and post-purchase figures are in the API and MCP only: the dashboard and App Home do not show them yet.