generated: '2026-08-04'
method: searched
source: https://liveouter.com/llms.txt
also: https://liveouter.com/.well-known/ucp
note: >-
  Cross-cutting semantics for the agent-facing surface Outer's storefront serves. Captured
  from the provider's own /llms.txt, /agents.md and UCP merchant profile. There is no
  OpenAPI to derive from.
authentication:
  style: OAuth 2.0 / OpenID Connect for customer accounts; UCP agent profile URI for the MCP endpoint
  detail: authentication/outer-authentication.yml
idempotency:
  supported: unknown
  note: >-
    Outer publishes no idempotency-key contract, and the gated MCP tools/list could not be
    introspected to check for one. Recorded as unknown rather than false, and deliberately
    NOT wired as a type: Idempotency pointer.
pagination:
  style: unknown for the MCP surface
  storefront:
    endpoints:
    - GET /collections/{handle}/products.json
    - GET /search?q={query}&type=product
    note: Shopify storefront JSON endpoints paginate with ?page= and ?limit=; not documented by Outer itself.
versioning:
  scheme: dated protocol version
  current: '2026-04-08'
  supported: ['2026-04-08', '2026-01-23']
  negotiation: >-
    Version-specific profiles are published at
    https://live-outer.myshopify.com/.well-known/ucp/{version}
  detail: lifecycle/outer-lifecycle.yml
error_envelope:
  shape: JSON-RPC 2.0 error object
  fields: [jsonrpc, id, error.code, error.message, error.data]
  observed:
    code: -32001
    message: UCP discovery failed
    data: {code: invalid_profile_url, continue_url: 'https://live-outer.myshopify.com/'}
  http_status_observed: 422
  rfc9457: false
rate_limiting:
  documented: true
  scope: per IP on the MCP endpoint
  signal: HTTP 429
  guidance: 'Respect rate limits. The MCP endpoint is rate-limited per IP. Back off on 429 responses.'
  source: https://liveouter.com/llms.txt
buyer_context:
  documented: true
  params: [context.address_country, context.currency]
  guidance: Pass buyer context for accurate pricing and availability.
human_in_the_loop:
  required: true
  rule: >-
    "Checkout requires human approval. Agents must not complete payment without explicit buyer
    consent." Agents without contemporaneous buyer approval are directed to route the purchase
    through Shop Pay via https://shop.app/SKILL.md.
read_only_surface:
  auth_required: false
  endpoints:
  - GET /collections/all
  - GET /products/{handle}
  - GET /products/{handle}.json
  - GET /collections/{handle}
  - GET /collections/{handle}/products.json
  - GET /search?q={query}&type=product
  - GET /sitemap.xml
  verified:
  - url: https://liveouter.com/products.json
    http_status: 200
    content_type: application/json
  - url: https://liveouter.com/sitemap.xml
    http_status: 200
cross_links:
  authentication: authentication/outer-authentication.yml
  scopes: scopes/outer-scopes.yml
  lifecycle: lifecycle/outer-lifecycle.yml
  mcp: mcp/outer-mcp.yml
  conformance: conformance/outer-conformance.yml