UCP Playground/Shared Session
Try it yourself
Storereitmans.com
ModelGemini 3.5 Flash
OutcomeCart Created
DateSep 16, 2026, 5:00 PM
Tokens59,038 (57,176p / 1,862c)
Duration16.3s
Turns3
StepsSearch ProductsView DetailsAdd to CartCheckout URL
Connected withSnapshot at session start
Negotiationv2026-08-25 · 7/8 active · shopping
  1. DiscoverRead /.well-known/ucp (declares 2026-08-25)
  2. Select versionMerchant and platform both run 2026-08-25
  3. Intersect8 declared · 7 shared spec · 1 vendor · 0 excluded
  4. Resolve extensionsActive extension blocks: shopping.fulfillment, shopping.discount
  5. ActivateAgent runs the shopping prompt with 9 negotiated capabilities
7 shared · 1 vendor · 0 excludedprompt: shopping
  • dev.ucp.shopping.cartactive
    2026-08-25
    Shared spec capability at a version both sides run.
  • dev.ucp.shopping.catalog.lookupactive
    2026-08-25
    Shared spec capability at a version both sides run.
  • dev.ucp.shopping.catalog.searchactive
    2026-08-25
    Shared spec capability at a version both sides run.
  • dev.ucp.shopping.checkoutactive
    2026-08-25
    Shared spec capability at a version both sides run.
  • dev.ucp.shopping.discountactive
    2026-08-25
    Shared spec capability at a version both sides run.
  • dev.ucp.shopping.fulfillmentactive
    2026-08-25
    Shared spec capability at a version both sides run.
  • dev.ucp.shopping.orderactive
    2026-08-25
    Shared spec capability at a version both sides run.
  • dev.shopify.catalogvendor
    2026-08-25
    Vendor namespace, not protocol-governed; passed through as the merchant declares it.
Servicesdev.ucp.shoppingmcp · embedded

Profile-only: this reads what the merchant declares against what this platform (2026-08-25) implements. It does not call any tool.

Buyer contextCountryCACurrencyCADLanguageen

Conversation

Find a women's black blazer in a size medium, pick the best match yourself without asking me, and add one to the cart. Do not check out.
Reasoning
**Searching for Blazers** I'm currently focused on fulfilling the initial request: locating a women's black blazer in a medium size. My aim is to identify the optimal match independently and proceed to add it to the cart without further user interaction.
create_cart528ms
Reasoning
**Analyzing Product Sizes** I've begun reviewing the search results, and my current focus is on understanding the available size ranges for the retrieved products. I've identified the first item, a `Black Double-Breasted Blazer`, and I'm currently examining its listed sizes. **Confirming Size Availability** I've confirmed that a medium size is available for the "Collarless One-Button Blazer" and the "Fitted One-Button Knit Blazer." I'm now cross-referencing these with the numeric sizing information. **Selecting Best Blazer** I've narrowed down the blazer choices to two excellent options: the "Fitted One-Button Knit Blazer - The Modern Stretch (R)" and the "Collarless One-Button Blazer - The Portfolio." Considering fabric and classic appeal, I'm leaning towards the "Fitted One-Button Knit Blazer" and am preparing to add it to the cart.
Reasoning
**Confirming Cart Contents** I've successfully added the blazer to my cart and verified the item details and total. The `continue_url` has also been captured.
I have found the Fitted One-Button Knit Blazer - The Modern Stretch (R) in black, size Medium, and added it to your cart.

* Product: Fitted One-Button Knit Blazer - The Modern Stretch (R)
* Color: Black
* Size: Medium (M)
* Price: $79.92 CAD (originally $99.90 CAD)

Your cart has been created successfully. Since you requested not to check out, you can review your cart or complete the purchase whenever you are ready using the following link:

View Cart / Checkout