generated: '2026-09-19' method: probed source: live GET of the named /.well-known/ path list on every host this record knows hit_count: 4 note: >- Eight hosts are in play. The two A2A hosts (publicdata-agent.songt50.us, news-agent.songt50.us) each serve ONE standard document — the A2A agent card — at both /.well-known/agent-card.json and the legacy /.well-known/agent.json (byte-identical, application/json, 2,284 and 2,007 bytes); every other path on them returns the host's real 404 (9-byte text/plain "Not Found"), so the hits are served documents and not a catch-all. The registrable domain songt50.us answers Cloudflare 522 (origin unreachable) on every path across three retries and www.songt50.us has no DNS record, so nothing can be said about the apex beyond "down". The four MCP resource-server hosts on onrender.com (the RFC 9728 place for oauth-protected-resource metadata) answer HTTP 503 "Service Suspended" (x-render-routing: suspend) on every path, so no OAuth/OIDC, security.txt, api-catalog, ai-plugin, ucp/acp, aauth or apis.json document is reachable there either; Cloudflare then rate-limited the remaining rows of our first burst with 429 challenge pages, which are OUR condition, not the provider's, and a slow re-probe six seconds apart confirmed 503 on the sampled paths. A WellKnown pointer is emitted on the strength of the four served agent-card documents; NO SecurityTxt pointer is emitted because no security.txt is served anywhere. No protected-resource or authorization-server metadata exists on any host, consistent with both the A2A agents and the MCP servers requiring no authentication. hosts: - host: https://publicdata-agent.songt50.us roles: [a2a-endpoint, a2a-card-host] path_echo_control: passed documents: - {path: /.well-known/agent-card.json, status: 200, content_type: application/json, file: ../a2a/songt50-us-agent-card.json} - {path: /.well-known/agent.json, status: 200, content_type: application/json, file: ../a2a/songt50-us-agent-card.json, note: legacy path; byte-identical} - {path: /.well-known/security.txt, status: 404} - {path: /.well-known/openid-configuration, status: 404} - {path: /.well-known/oauth-authorization-server, status: 404} - {path: /.well-known/oauth-protected-resource, status: 404} - {path: /.well-known/api-catalog, status: 404} - {path: /.well-known/api-catalog.json, status: 404} - {path: /.well-known/ai-plugin.json, status: 404} - {path: /.well-known/ucp.json, status: 404} - {path: /.well-known/acp.json, status: 404} - {path: /.well-known/aauth-resource.json, status: 404} - {path: /.well-known/apis.json, status: 404} - {path: /apis.json, status: 404} - {path: /apis.yml, status: 404} - {path: /.well-known/mcp.json, status: 404} - {path: /llms.txt, status: 404} - {path: /openapi.json, status: 404} - {path: /robots.txt, status: 200, content_type: text/plain, note: 'Cloudflare-managed "content signals" robots.txt (1,248 bytes), no Disallow lines; not a provider document, not saved'} - host: https://news-agent.songt50.us roles: [a2a-endpoint, a2a-card-host] path_echo_control: passed documents: - {path: /.well-known/agent-card.json, status: 200, content_type: application/json, file: ../a2a/songt50-us-news-agent-card.json} - {path: /.well-known/agent.json, status: 200, content_type: application/json, file: ../a2a/songt50-us-news-agent-card.json, note: legacy path; byte-identical} - {path: /.well-known/security.txt, status: 404} - {path: /.well-known/openid-configuration, status: 404} - {path: /.well-known/oauth-authorization-server, status: 404} - {path: /.well-known/oauth-protected-resource, status: 404} - {path: /.well-known/api-catalog, status: 404} - {path: /.well-known/api-catalog.json, status: 404} - {path: /.well-known/ai-plugin.json, status: 404} - {path: /.well-known/ucp.json, status: 404} - {path: /.well-known/acp.json, status: 404} - {path: /.well-known/aauth-resource.json, status: 404} - {path: /.well-known/apis.json, status: 404} - {path: /apis.json, status: 404} - {path: /apis.yml, status: 404} - {path: /.well-known/mcp.json, status: 404} - {path: /llms.txt, status: 404} - {path: /openapi.json, status: 404} - {path: /robots.txt, status: 200, content_type: text/plain, note: same Cloudflare-managed content-signals file; not saved} - host: https://songt50.us roles: [registrable-domain, website] documents: - {path: /, status: 522, note: 'Cloudflare 522 origin unreachable, three retries ~20 s each, 2026-09-19; DNS is two Cloudflare anycast A records, NS luciane/mario.ns.cloudflare.com'} - {path: /.well-known/security.txt, status: 522} - {path: /.well-known/openid-configuration, status: 522} - {path: /.well-known/oauth-authorization-server, status: 522} - {path: /.well-known/oauth-protected-resource, status: 522} - {path: /.well-known/api-catalog, status: 522} - {path: /.well-known/ai-plugin.json, status: 522} - {path: /.well-known/ucp.json, status: 522} - {path: /.well-known/acp.json, status: 522} - {path: /.well-known/aauth-resource.json, status: 522} - {path: /.well-known/apis.json, status: 522} - {path: /apis.json, status: 522} - {path: /apis.yml, status: 522} - {path: /.well-known/agent-card.json, status: 522} - {path: /.well-known/agent.json, status: 522} - {path: /openapi.json, status: 522} - {path: /llms.txt, status: 522} - host: https://www.songt50.us roles: [www] documents: - {path: /, status: 0, note: 'no DNS record (curl exit 6, could not resolve host); no path on this host can be probed'} - host: https://korean-public-data-mcp.onrender.com roles: [mcp-server, rfc9728-resource-server] documents: - {path: /mcp, status: 503, note: 'text/html "Service Suspended", x-render-routing: suspend — the Render service is suspended host-wide'} - {path: /.well-known/security.txt, status: 503} - {path: /.well-known/openid-configuration, status: 503} - {path: /.well-known/oauth-authorization-server, status: 503} - {path: /.well-known/oauth-protected-resource, status: 429, note: 'Cloudflare "Just a moment" challenge to our burst; host is suspended (503) on every path re-probed slowly'} - {path: /.well-known/api-catalog, status: 429, note: same} - {path: /.well-known/ai-plugin.json, status: 429, note: same} - {path: /.well-known/ucp.json, status: 429, note: same} - {path: /.well-known/acp.json, status: 429, note: same} - {path: /.well-known/aauth-resource.json, status: 429, note: same} - {path: /.well-known/apis.json, status: 429, note: same} - {path: /apis.json, status: 429, note: same} - {path: /apis.yml, status: 429, note: same} - {path: /.well-known/agent-card.json, status: 429, note: same} - {path: /.well-known/agent.json, status: 429, note: same} - host: https://korean-news-mcp.onrender.com roles: [mcp-server, rfc9728-resource-server] documents: - {path: /, status: 503, note: 'slow re-probe, 6 s apart: text/html "Service Suspended", x-render-routing: suspend'} - {path: /mcp, status: 503, note: slow re-probe} - {path: /.well-known/security.txt, status: 503, note: slow re-probe} - {path: /.well-known/oauth-protected-resource, status: 503, note: slow re-probe} - {path: /.well-known/openid-configuration, status: 503} - {path: /.well-known/oauth-authorization-server, status: 503} - {path: /.well-known/api-catalog, status: 429, note: Cloudflare challenge to our burst; host suspended} - {path: /.well-known/ai-plugin.json, status: 429, note: same} - {path: /.well-known/ucp.json, status: 429, note: same} - {path: /.well-known/acp.json, status: 429, note: same} - {path: /.well-known/aauth-resource.json, status: 429, note: same} - {path: /.well-known/apis.json, status: 429, note: same} - {path: /apis.json, status: 429, note: same} - {path: /apis.yml, status: 429, note: same} - {path: /.well-known/agent-card.json, status: 429, note: same} - {path: /.well-known/agent.json, status: 429, note: same} - host: https://korean-stock-mcp.onrender.com roles: [mcp-server, rfc9728-resource-server] documents: - {path: /mcp, status: 503, note: 'text/html "Service Suspended", x-render-routing: suspend'} - {path: /.well-known/security.txt, status: 503} - {path: /.well-known/openid-configuration, status: 503} - {path: /.well-known/oauth-authorization-server, status: 503} - {path: /.well-known/oauth-protected-resource, status: 429, note: Cloudflare challenge to our burst; host suspended} - {path: /.well-known/api-catalog, status: 429, note: same} - {path: /.well-known/ai-plugin.json, status: 429, note: same} - {path: /.well-known/ucp.json, status: 429, note: same} - {path: /.well-known/acp.json, status: 429, note: same} - {path: /.well-known/aauth-resource.json, status: 429, note: same} - {path: /.well-known/apis.json, status: 429, note: same} - {path: /apis.json, status: 429, note: same} - {path: /apis.yml, status: 429, note: same} - {path: /.well-known/agent-card.json, status: 429, note: same} - {path: /.well-known/agent.json, status: 429, note: same} - host: https://korean-agriculture-mcp.onrender.com roles: [mcp-server, rfc9728-resource-server] documents: - {path: /mcp, status: 503, note: 'text/html "Service Suspended", x-render-routing: suspend'} - {path: /.well-known/security.txt, status: 503} - {path: /.well-known/openid-configuration, status: 503} - {path: /.well-known/oauth-authorization-server, status: 503} - {path: /.well-known/oauth-protected-resource, status: 429, note: Cloudflare challenge to our burst; host suspended} - {path: /.well-known/api-catalog, status: 429, note: same} - {path: /.well-known/ai-plugin.json, status: 429, note: same} - {path: /.well-known/ucp.json, status: 429, note: same} - {path: /.well-known/acp.json, status: 429, note: same} - {path: /.well-known/aauth-resource.json, status: 429, note: same} - {path: /.well-known/apis.json, status: 429, note: same} - {path: /apis.json, status: 429, note: same} - {path: /apis.yml, status: 429, note: same} - {path: /.well-known/agent-card.json, status: 429, note: same} - {path: /.well-known/agent.json, status: 429, note: same}