generated: '2026-08-23'
method: probed
source: https://checkout.johnnie-o.com/api/ucp/mcp
status: published
note: >-
  Johnnie-O's storefront serves a live, anonymously listable MCP endpoint implementing the
  Universal Commerce Protocol (UCP) shopping service. Discovered from the store's own
  /llms.txt and confirmed against /.well-known/ucp. The server is Shopify platform
  infrastructure running on the merchant's own primary domain (shop id 22750137) — Johnnie-O
  did not author the tool surface, but it is served from a host Johnnie-O controls and it
  transacts Johnnie-O's own catalog, carts, checkouts and orders. Recorded on that basis; the
  full verbatim tools/list response is saved alongside as johnnie-o-mcp-tools-list.json.
deployment:
  mode: remote
  endpoint: https://checkout.johnnie-o.com/api/ucp/mcp
  auth: none
  verified: probed
  note: >-
    tools/list is anonymous and returned HTTP 200 with 13 tools and full inputSchemas.
    tools/call is NOT anonymous: every invocation attempted returned JSON-RPC error -32001
    "UCP discovery failed" / data.code invalid_profile_url ("Unable to fetch agent profile:
    Missing profile uri"), so an agent must present a UCP agent profile URI before any tool
    executes. Schema discovery is open; execution is gated on agent identity.
server:
  name: johnnie-o-ucp-shopping
  transport: http
  protocol: mcp
  url: https://checkout.johnnie-o.com/api/ucp/mcp
  alternate_url: https://johnnie-oadmin.myshopify.com/api/ucp/mcp
  api_version_header: x-shopify-ucp-mcp-api-version
  api_version: '2026-04-08'
  platform: Shopify (UCP shopping service)
  spec: https://ucp.dev/2026-04-08/specification/overview/
  schema: https://ucp.dev/2026-04-08/services/shopping/mcp.openrpc.json
  supported_ucp_versions:
  - '2026-04-08'
  - '2026-01-23'
discovery:
- url: https://checkout.johnnie-o.com/llms.txt
  status: 200
- url: https://checkout.johnnie-o.com/agents.md
  status: 200
- url: https://checkout.johnnie-o.com/.well-known/ucp
  status: 200
x-evidence:
  fetched: '2026-08-23'
  url: https://checkout.johnnie-o.com/api/ucp/mcp
  method: POST
  body: '{"jsonrpc":"2.0","id":1,"method":"tools/list"}'
  http_status: 200
  content_type: application/json; charset=utf-8
  tool_count: 13
  raw: johnnie-o-mcp-tools-list.json
tools:
- name: get_checkout
  category: checkout
  description: Returns details about the checkout, including line items, totals, and any applicable
    discounts or taxes.
  required: [meta, id]
- name: create_checkout
  category: checkout
  description: Creates a checkout. Returns checkout details, including line items, totals, and
    any applicable discounts or taxes.
  required: [meta, checkout]
- name: update_checkout
  category: checkout
  description: Updates a checkout. Returns checkout details, including line items, totals, and
    any applicable discounts or taxes.
  required: [meta, checkout, id]
- name: complete_checkout
  category: checkout
  description: Completes a checkout and returns the checkout result, including order ID and Thank
    You Page URL, or any errors encountered.
  required: [meta, id, checkout]
- name: cancel_checkout
  category: checkout
  description: Cancels a checkout.
  required: [meta, id]
- name: get_cart
  category: cart
  description: Get the cart contents.
  required: [meta, id]
- name: create_cart
  category: cart
  description: Creates a new cart.
  required: [meta, cart]
- name: update_cart
  category: cart
  description: Perform updates to a cart.
  required: [meta, cart, id]
- name: cancel_cart
  category: cart
  description: Cancels a cart.
  required: [meta, id]
- name: get_order
  category: order
  description: Get the details of an order.
  required: [meta, id]
- name: search_catalog
  category: catalog
  description: Search for products from the online store, hosted on Shopify.
  required: [meta, catalog]
- name: lookup_catalog
  category: catalog
  description: Look up multiple products or variants by identifier.
  required: [meta, catalog]
- name: get_product
  category: catalog
  description: Retrieve complete product detail by identifier. Returns a singular product.
  required: [meta, catalog]
capabilities:
- dev.ucp.shopping.checkout
- dev.ucp.shopping.cart
- dev.ucp.shopping.fulfillment
- dev.ucp.shopping.discount
payment_handlers:
- dev.shopify.shop_pay
- dev.shopify.card
- google_pay
buyer_approval_required: true
buyer_approval_note: >-
  The store's own /llms.txt states "Checkout requires human approval. Agents must not complete
  payment without explicit buyer consent."