generated: '2026-08-06'
method: derived
source: >-
  mcp/arccos-golf-ucp-mcp-tools.json (live tools/list, 2026-08-06) bound against
  openapi/arccos-golf-on-course-data-api-openapi.yml
headline: >-
  Arccos Golf's two machine surfaces do not overlap at all. The MCP server is the Shopify UCP commerce endpoint
  on the storefront host; the OpenAPI is the On-Course Data API on the API host. Zero of the 13 MCP tools bind to
  any of the 12 REST operations, and none of the REST operations is exposed to agents through MCP. Recorded here
  because that divergence is the finding — an agent that discovers Arccos through /llms.txt can buy a sensor but
  cannot read a single round, club or course.
surfaces:
- kind: openapi
  name: Arccos On-Course Data API
  spec: openapi/arccos-golf-on-course-data-api-openapi.yml
  base_url: https://api.arccosgolf.com/
  operations: 12
  gated: >-
    partially — 9 of 12 operations require OAuth 2.0 (authorization code) or HTTP Basic; the 3 course-catalog
    reads were verified anonymously callable on 2026-08-06
- kind: mcp
  name: Arccos Golf Storefront UCP MCP Server
  url: https://www.arccosgolf.com/api/ucp/mcp
  tools: 13
  gated: false
  gated_note: tools/list returns full inputSchemas anonymously; completing a checkout requires buyer approval
- kind: graphql
  present: false
crosswalk: []
mcp_only:
- tool: search_catalog
  reason: Shopify storefront commerce; the On-Course Data API has no product/catalog resource.
- tool: lookup_catalog
  reason: Shopify storefront commerce; no REST equivalent.
- tool: get_product
  reason: Shopify storefront commerce; no REST equivalent.
- tool: create_cart
  reason: Shopify storefront commerce; no REST equivalent.
- tool: get_cart
  reason: Shopify storefront commerce; no REST equivalent.
- tool: update_cart
  reason: Shopify storefront commerce; no REST equivalent.
- tool: cancel_cart
  reason: Shopify storefront commerce; no REST equivalent.
- tool: create_checkout
  reason: Shopify storefront commerce; no REST equivalent.
- tool: get_checkout
  reason: Shopify storefront commerce; no REST equivalent.
- tool: update_checkout
  reason: Shopify storefront commerce; no REST equivalent.
- tool: complete_checkout
  reason: Shopify storefront commerce; no REST equivalent.
- tool: cancel_checkout
  reason: Shopify storefront commerce; no REST equivalent.
- tool: get_order
  reason: Shopify storefront commerce; no REST equivalent.
rest_only:
- operationId: handle_get_one_user.get./v5/users/{userId}
  summary: Get One User
  reason: No MCP tool exposes Arccos golfer data.
- operationId: handle_search_rounds.get./v5/users/{userId}/rounds
  summary: Get Rounds
  reason: No MCP tool exposes Arccos golfer data.
- operationId: handle_get_one_round.get./v5/users/{userId}/rounds/{roundId}
  summary: Get One Round
  reason: No MCP tool exposes Arccos golfer data.
- operationId: handle_get_round_stats.get./v5/users/{userId}/rounds/{roundId}/stats
  summary: Get Round Stats
  reason: No MCP tool exposes Arccos golfer data.
- operationId: handle_search_clubs.get./v5/users/{userId}/clubs
  summary: Search clubs
  reason: No MCP tool exposes Arccos golfer data.
- operationId: handle_get_one_club.get./v5/users/{userId}/clubs/{clubId}
  summary: Get One Club
  reason: No MCP tool exposes Arccos golfer data.
- operationId: handle_search_courses.get./v5/courses
  summary: Search Courses
  reason: >-
    Anonymously callable and the most obviously agent-ready operation in the estate, yet exposed through no MCP
    tool.
- operationId: handle_get_one_course.get./v5/courses/{courseId}
  summary: Get One Course
  reason: No MCP tool exposes the Arccos course catalog.
- operationId: handle_get_one_course_version.get./v5/courses/{courseId}/versions/{courseVersion}
  summary: Get One Course Version
  reason: No MCP tool exposes the Arccos course catalog.
- operationId: handle_get_webhooks.get./v5/webhooks
  summary: Get Webhooks
  reason: Client-administrative operation; not an agent surface.
- operationId: handle_create_webhook.post./v5/webhooks
  summary: Create Webhook
  reason: Client-administrative operation; not an agent surface.
- operationId: handle_delete_webhook.delete./v5/webhooks/{webhookId}
  summary: Delete Webhook
  reason: Client-administrative operation; not an agent surface.
coverage:
  mcp_tools: 13
  rest_operations: 12
  bound: 0
  mcp_only: 13
  rest_only: 12
  binding_rate: 0.0