generated: '2026-07-20'
method: searched
status: published
source: https://pendulumlife.com/llms.txt
note: Pendulum's Shopify store publishes a hosted Universal Commerce Protocol (UCP, ucp.dev) agent-commerce
  surface. The MCP endpoint is provided by the Shopify platform (dev.ucp.shopping service), not a bespoke
  Pendulum developer server. Checkout requires contemporaneous human/buyer approval; the endpoint is rate-limited
  per IP (429 backoff). Tool list is documented in llms.txt and the UCP shopping OpenRPC schema; a raw
  tools/list call requires an agent profile URI (422 invalid_profile_url without one).
server:
  name: pendulum-ucp-shopping
  protocol: Universal Commerce Protocol
  ucp_version: '2026-04-08'
  transport: http
  url: https://pendulumlife.com/api/ucp/mcp
  canonical_url: https://pendulum-therapeutics.myshopify.com/api/ucp/mcp
  discovery: https://pendulumlife.com/.well-known/ucp
  schema: https://ucp.dev/2026-04-08/services/shopping/mcp.openrpc.json
tools:
- name: search_catalog
  description: Search the store catalog for products matching a buyer's intent.
  source: https://pendulumlife.com/llms.txt
- name: create_cart
  description: Create a cart and add desired items.
  source: https://pendulumlife.com/llms.txt
- name: create_checkout
  description: Start the purchase/checkout flow.
  source: https://pendulumlife.com/llms.txt
- name: update_checkout
  description: Set shipping address and shipping method on a checkout.
  source: https://pendulumlife.com/llms.txt
- name: complete_checkout
  description: Finalize the purchase (buyer must approve payment).
  source: https://pendulumlife.com/llms.txt
deployment:
  mode: remote
  endpoint: https://pendulumlife.com/api/ucp/mcp
  verified: probed
  probe: live
  tools: 13
  checked: '2026-08-12'
  source: catalog MCP census