generated: '2026-07-18'
method: searched
status: published
source: https://casper.com/llms.txt + https://casper.com/.well-known/ucp
notes: Casper's casper.com storefront runs on Shopify and exposes an agentic-commerce MCP server via the
  Universal Commerce Protocol (UCP, ucp.dev). The MCP endpoint requires a UCP discovery/agent-profile
  handshake before tools/list succeeds (a bare tools/list returns error -32001 invalid_profile_url). Tool
  set below is the UCP dev.ucp.shopping surface documented in llms.txt and the UCP shopping schema.
server:
  name: casper-ucp-shopping
  transport: http
  protocol: mcp
  url: https://casper.com/api/ucp/mcp
  discovery: https://casper.com/.well-known/ucp
  ucp_version: '2026-04-08'
  supported_versions:
  - '2026-04-08'
  - '2026-01-23'
  schema: https://ucp.dev/2026-04-08/services/shopping/mcp.openrpc.json
  platform: Shopify
tools:
- name: search_catalog
  description: Cross-store catalog search for products matching the buyer's intent.
- name: create_cart
  description: Create a cart and add desired items.
- name: create_checkout
  description: Start the purchase flow from a cart.
- name: update_checkout
  description: Set shipping address and shipping method on a checkout.
- name: complete_checkout
  description: Finalize the purchase; buyer must approve payment (human-in-the-loop required).
rules:
- Checkout requires contemporaneous human/buyer approval before payment is completed.
- MCP endpoint is rate-limited per IP; back off on HTTP 429.
- Pass buyer context (context.address_country, context.currency) for accurate pricing/availability.
deployment:
  mode: remote
  endpoint: https://casper.com/api/ucp/mcp
  verified: probed
  probe: live
  tools: 13
  checked: '2026-08-12'
  source: catalog MCP census