UCP Playground/Shared Session
Try it yourself
Storebellalusy.com
ModelGemini 3.6 Flash
OutcomeCart Created
DateSep 25, 2026, 11:26 AM
Tokens74,253 (73,059p / 1,194c)
Duration12.3s
Turns4
StepsSearch ProductsView DetailsAdd to CartCheckout URL
Connected withSnapshot at session start
Negotiationv2026-08-25 · 8/9 active · shopping
  1. DiscoverRead /.well-known/ucp (declares 2026-08-25)
  2. Select versionMerchant and platform both run 2026-08-25
  3. Intersect9 declared · 8 shared spec · 1 vendor · 0 excluded
  4. Resolve extensionsActive extension blocks: shopping.fulfillment, shopping.discount
  5. ActivateAgent runs the shopping prompt with 10 negotiated capabilities
8 shared · 1 vendor · 0 excludedprompt: shopping
  • dev.ucp.common.identity_linkingactive
    2026-08-25
    Shared spec capability at a version both sides run.
  • 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 contextCountryUSCurrencyUSDLanguageen

Conversation

Find a black leather belt in size 85. Call the tools one after another without stopping to tell me what you will do next. Pick the best match yourself without asking me, add one to the cart, then fetch the cart and read back the item name and the cart total. If nothing matches, say so and don't add anything. Do not check out.
Reasoning
**Finding Belt Details** I am now focused on identifying a black leather belt in size 85. My next steps involve calling the tools sequentially and selecting the optimal match without further consultation. Following that, I will add the chosen item to the cart.
create_cart845ms
Reasoning
**Selecting Best Match** I'm currently evaluating several promising matches and have narrowed them down. My focus is on selecting the optimal choice from "Black Leather Belt with Gold-Tone Buckle," "Black Leather Belt with Silver Buckle," and "Premium Black Leather Belt width 4.0cm." I've made a decision to go with the "Black Leather Belt with Gold-Tone Buckle."
get_cart201ms
Reasoning
**Confirming Cart Contents** I've successfully identified the black leather belt in size 85. The current cart total is $110.00. My next step is to address the tools.
I have selected the Black Leather Belt with Gold-Tone Buckle in size 85 and added it to your cart.

Cart Details:
- Item Name: Black Leather Belt with Gold-Tone Buckle - 85
- Cart Total: $110.00 USD