generated: '2026-07-17'
method: searched
status: published
source: https://99counties.com/llms.txt
server:
  name: 99-counties-ucp
  transport: http
  protocol: UCP (Universal Commerce Protocol)
  url: https://99counties.com/api/ucp/mcp
  content_type: application/json
  spec: https://ucp.dev/2026-04-08/specification/overview/
  schema: https://ucp.dev/2026-04-08/services/shopping/mcp.openrpc.json
  discovery: https://99counties.com/.well-known/ucp
  platform: Shopify
  supported_versions:
  - '2026-04-08'
  - '2026-01-23'
  notes: >-
    Real published MCP endpoint implementing the dev.ucp.shopping service. tools/list
    requires a UCP agent profile URI (returns error invalid_profile_url without one).
    Checkout requires contemporaneous human/buyer approval; endpoint is rate-limited per IP (429 backoff).
# Tools documented in the store's own /llms.txt agent flow (dev.ucp.shopping.*).
tools:
- name: search_catalog
  description: Find products matching the buyer's intent
  capability: dev.ucp.shopping.catalog.search
- name: create_cart
  description: Add desired items to a cart
  capability: dev.ucp.shopping.cart
- name: create_checkout
  description: Start the purchase flow
  capability: dev.ucp.shopping.checkout
- name: update_checkout
  description: Set shipping address and method
  capability: dev.ucp.shopping.fulfillment
- name: complete_checkout
  description: Finalize the purchase (buyer must approve payment)
  capability: dev.ucp.shopping.order