generated: '2026-08-04'
method: searched
status: published
source: https://account.hubblecontacts.com/agents.md
server:
  name: hubble-contacts-ucp
  transport: http
  protocol: MCP / JSON-RPC 2.0
  url: https://account.hubblecontacts.com/api/ucp/mcp
  alternate_url: https://hubble-prod.myshopify.com/api/ucp/mcp
  discovery: https://account.hubblecontacts.com/.well-known/ucp
  platform: Shopify (UCP native)
  first_party: false
  first_party_note: >-
    The endpoint is served from Hubble Contacts' own host and advertised by Hubble's
    own /agents.md and /llms.txt, but the UCP/MCP implementation is provided by the
    Shopify platform rather than authored by Hubble.
protocol:
  name: Universal Commerce Protocol
  spec: https://ucp.dev/2026-04-08/specification/overview/
  version: '2026-04-08'
  supported_versions:
  - '2026-04-08'
  - '2026-01-23'
  schema: https://ucp.dev/2026-04-08/services/shopping/mcp.openrpc.json
capabilities:
- dev.ucp.shopping.catalog.search
- dev.ucp.shopping.catalog.lookup
- dev.ucp.shopping.cart
- dev.ucp.shopping.checkout
- dev.ucp.shopping.fulfillment
- dev.ucp.shopping.discount
- dev.ucp.shopping.order
- dev.shopify.catalog
payment_handlers:
- com.google.pay
- dev.shopify.card
introspection:
  tools_list: gated
  observed_response:
    http_status: 422
    jsonrpc_error_code: -32001
    message: UCP discovery failed
    data_code: invalid_profile_url
  note: >-
    POST {"jsonrpc":"2.0","id":1,"method":"tools/list"} returns HTTP 422 with
    invalid_profile_url ("Missing profile uri"). Live tool input schemas require a
    registered UCP agent profile, so the tool list below is taken from the two
    published, unauthenticated sources instead: Hubble's own /agents.md flow and the
    canonical UCP Shopping OpenRPC document the store's /.well-known/ucp points at.
    Names and summaries are real; per-tool input schemas were NOT observed and are
    not asserted here.
tools:
- name: search_catalog
  description: Search for products in the catalog
  params: [meta, catalog]
  source: https://ucp.dev/2026-04-08/services/shopping/mcp.openrpc.json
  named_in_provider_docs: true
- name: lookup_catalog
  description: Batch lookup products or variants by identifier
  params: [meta, catalog]
  source: https://ucp.dev/2026-04-08/services/shopping/mcp.openrpc.json
  named_in_provider_docs: false
- name: get_product
  description: Get product details
  params: [meta, catalog]
  source: https://ucp.dev/2026-04-08/services/shopping/mcp.openrpc.json
  named_in_provider_docs: false
- name: create_cart
  description: Create a cart
  params: [meta, cart]
  source: https://ucp.dev/2026-04-08/services/shopping/mcp.openrpc.json
  named_in_provider_docs: true
- name: get_cart
  description: Get cart
  params: [meta, id]
  source: https://ucp.dev/2026-04-08/services/shopping/mcp.openrpc.json
  named_in_provider_docs: false
- name: update_cart
  description: Update cart
  params: [meta, id, cart]
  source: https://ucp.dev/2026-04-08/services/shopping/mcp.openrpc.json
  named_in_provider_docs: false
- name: cancel_cart
  description: Cancel cart
  params: [meta, id]
  source: https://ucp.dev/2026-04-08/services/shopping/mcp.openrpc.json
  named_in_provider_docs: false
- name: create_checkout
  description: Create a checkout
  params: [meta, checkout]
  source: https://ucp.dev/2026-04-08/services/shopping/mcp.openrpc.json
  named_in_provider_docs: true
- name: get_checkout
  description: Get checkout
  params: [meta, id]
  source: https://ucp.dev/2026-04-08/services/shopping/mcp.openrpc.json
  named_in_provider_docs: false
- name: update_checkout
  description: Update checkout
  params: [meta, id, checkout]
  source: https://ucp.dev/2026-04-08/services/shopping/mcp.openrpc.json
  named_in_provider_docs: true
- name: complete_checkout
  description: Complete checkout and place order
  params: [meta, id, checkout]
  source: https://ucp.dev/2026-04-08/services/shopping/mcp.openrpc.json
  named_in_provider_docs: true
- name: cancel_checkout
  description: Cancel checkout
  params: [meta, id]
  source: https://ucp.dev/2026-04-08/services/shopping/mcp.openrpc.json
  named_in_provider_docs: false
- name: get_order
  description: Get order
  params: [meta, id]
  source: https://ucp.dev/2026-04-08/services/shopping/mcp.openrpc.json
  named_in_provider_docs: false
rules:
  human_approval_required: true
  human_approval_note: >-
    Hubble's /agents.md states agents must not complete payment without explicit
    contemporaneous buyer consent, and directs agents that cannot obtain it to route
    the purchase through the Shop skill (https://shop.app/SKILL.md) and Shop Pay.
  rate_limited: true
  rate_limit_note: Rate limited per IP; agents are told to back off on HTTP 429.
  buyer_context: [context.address_country, context.currency]
x-evidence:
  fetched: '2026-08-04'
  probes:
  - url: https://account.hubblecontacts.com/.well-known/ucp
    http_status: 200
    content_type: application/json
  - url: https://account.hubblecontacts.com/agents.md
    http_status: 200
    content_type: text/markdown
  - url: https://account.hubblecontacts.com/api/ucp/mcp
    method: POST
    body: '{"jsonrpc":"2.0","id":1,"method":"tools/list"}'
    http_status: 422
  - url: https://ucp.dev/2026-04-08/services/shopping/mcp.openrpc.json
    http_status: 200