generated: '2026-07-21'
method: searched
source: https://thebeardclub.com/.well-known/ucp
standards:
- id: ucp-shopping
  name: Universal Commerce Protocol — Shopping (2026-04-08)
  conforms: true
  evidence: /.well-known/ucp advertises dev.ucp.shopping services + capabilities (cart, checkout, fulfillment, discount, order, catalog) over an MCP transport
- id: mcp
  name: Model Context Protocol
  conforms: true
  evidence: UCP shopping service exposed as an MCP endpoint at /api/ucp/mcp (JSON-RPC 2.0)
- id: oidc
  name: OpenID Connect
  conforms: true
  evidence: /.well-known/openid-configuration (Shopify Customer Account API, RS256 id_token, code flow)
- id: oauth2
  name: OAuth 2.0 Authorization Server (RFC 8414)
  conforms: true
  evidence: /.well-known/oauth-authorization-server present; authorizationCode + refresh_token + PKCE (S256)
- id: pkce
  name: OAuth 2.0 PKCE (RFC 7636)
  conforms: true
  evidence: code_challenge_methods_supported includes S256
- id: google-pay-ucp
  name: Google Pay UCP payment handler
  conforms: true
  evidence: payment_handlers.com.google.pay configured for the merchant
- id: shop-pay
  name: Shopify Shop Pay UCP payment handler
  conforms: true
  evidence: payment_handlers.dev.shopify.shop_pay configured
- id: rfc9457-problem-details
  name: RFC 9457 Problem Details
  conforms: false