generated: '2026-07-18'
method: searched
source: >-
  https://becausemarket.com/.well-known/ucp,
  https://becausemarket.com/.well-known/openid-configuration
standards:
- id: ucp-shopping
  name: Universal Commerce Protocol (UCP) dev.ucp.shopping
  conforms: true
  version: '2026-04-08'
  evidence: /.well-known/ucp advertises dev.ucp.shopping over mcp + embedded transports
- id: oidc
  name: OpenID Connect Discovery 1.0
  conforms: true
  evidence: /.well-known/openid-configuration served (Shopify Customer Accounts)
- id: oauth2
  name: OAuth 2.0 (RFC 6749) authorization_code
  conforms: true
  evidence: authorization_code + refresh_token grants with PKCE (S256) in OIDC metadata
- id: pkce
  name: PKCE (RFC 7636)
  conforms: true
  evidence: code_challenge_methods_supported includes S256
- id: llms-txt
  name: llms.txt agent-instructions convention
  conforms: true
  evidence: /llms.txt and /agents.md published (200)
- id: rfc9116-security-txt
  name: security.txt (RFC 9116)
  conforms: false
  evidence: /.well-known/security.txt returned 404