UCP Playground/Shared Session
Try it yourself
Storeforever21.com
ModelGemini 3.6 Flash
OutcomeCart Created
DateSep 17, 2026, 9:50 PM
Tokens77,756 (77,046p / 710c)
Duration10.8s
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 contextCountryUSCurrencyUSDLanguageen

Conversation

Find a women's black dress in size medium. Pick the best match yourself without asking me, add one to the cart, then read back the item name and the cart total. Do not check out.
Reasoning
**Finding the Black Dress** Okay, I've got it. My primary goal now is to zero in on a great black dress in medium. I'm focusing on finding the ideal item without asking any questions, then adding it to the cart. I'm getting ready to report back with the name of the dress and the new total.
create_cart911ms
Reasoning
**Analyzing Product Availability** I've got the initial product data now. Currently, I am focused on availability details for two items. Product 1, the "Satin Lace Cutout Mini Dress," in black and medium, and Product 2, the "Ribbed Knit Mock Neck Midi Dress" are both present with price and ID information, ready for analysis.
Reasoning
**Verifying Cart Creation** Okay, the cart creation looks successful, with the "Ribbed Knit Mock Neck Midi Dress - BLACK / M" added. Quantity one, at $11.99, bringing the cart total to $11.99. I will continue checking the user instructions.
I've added the following item to your cart:

* Item Name: Ribbed Knit Mock Neck Midi Dress (BLACK / M)
* Cart Total: $11.99 USD