generated: '2026-09-19'
method: searched
hosts:
- host: https://upsun.com
  documents:
  - path: /.well-known/security.txt
    status: 200
    file: upsun-security.txt
  - path: /.well-known/openid-configuration
    status: 404
  - path: /.well-known/ai-plugin.json
    status: 404
- host: https://auth.upsun.com
  documents:
  - path: /.well-known/openid-configuration
    status: 200
    file: upsun-openid-configuration.json
  - path: /.well-known/oauth-authorization-server
    status: 200
    file: upsun-auth-oauth-authorization-server.json
    bytes: 751
  path_echo_control: passed
- host: https://api.upsun.com
  documents:
  - path: /.well-known/security.txt
    status: 404
  - path: /.well-known/openid-configuration
    status: 404
  - path: /.well-known/api-catalog
    status: 404
- host: https://mcp.upsun.com
  documents:
  - path: /.well-known/oauth-protected-resource
    status: 200
    file: upsun-mcp-oauth-protected-resource.json
    bytes: 215
  path_echo_control: passed
notes: security.txt (RFC 9116) is published on the website root with contact, policy (responsible disclosure)
  and a hall of fame. OpenID Connect discovery is published on auth.upsun.com (authorization_code + client_credentials
  grants, PKCE S256, ES256 id tokens, RFC 8707 resource indicators supported).
x-mcp-probe:
  probed: '2026-09-19'
  issue: roadmap#321, roadmap#337
  documents:
  - host: https://mcp.upsun.com
    path: /.well-known/oauth-protected-resource
    file: upsun-mcp-oauth-protected-resource.json
  - host: https://auth.upsun.com
    path: /.well-known/oauth-authorization-server
    file: upsun-auth-oauth-authorization-server.json
  validated_on: resource (RFC 9728) / issuer (RFC 8414, OIDC)
  negative_control: one per host; a 2xx JSON object at an impossible path discards the host
note: 'MCP-host OAuth discovery added 2026-09-19 (roadmap#321/#337): the harvest visits a provider''s
  primary hosts, and RFC 9728 protected-resource metadata lives on the MCP host, so these documents existed
  and were invisible to the scorer. Fetched live and validated on `resource`/`issuer`; one negative control
  per host.'