generated: '2026-07-20'
method: searched
source: https://petstore.com/.well-known/ucp
standards:
  - id: ucp
    name: Universal Commerce Protocol
    conforms: true
    version: '2026-04-08'
    evidence: /.well-known/ucp advertises UCP merchant profile with shopping services and capabilities
  - id: mcp
    name: Model Context Protocol
    conforms: true
    evidence: UCP shopping service exposes an MCP transport at /api/ucp/mcp (JSON-RPC 2.0)
  - id: oidc
    name: OpenID Connect
    conforms: true
    evidence: /.well-known/openid-configuration (Shopify Customer Account), RS256 id_token, S256 PKCE
  - id: oauth2
    name: OAuth 2.0
    conforms: true
    evidence: authorization_code + refresh_token grants, client_secret_basic token auth
  - id: rfc9116-security-txt
    name: security.txt
    conforms: false
    evidence: /.well-known/security.txt returned 404
  - id: rfc9457-problem-details
    name: RFC 9457 Problem Details
    conforms: false
    evidence: errors use JSON-RPC 2.0 error objects, not application/problem+json