generated: '2026-09-19' method: searched source: live probes of /.well-known/ paths across all known hosts note: 'security.txt (RFC 9116) is served identically on entergram.com, www.entergram.com and api.entergram.com. The MCP host mcp.entergram.com serves RFC 8414 OAuth authorization-server metadata and RFC 9728 protected-resource metadata (the auth server itself is app.entergram.com). No api-catalog, apis.json, ai-plugin.json, openid-configuration or agent card was found on any host. 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.' hosts: - host: https://entergram.com documents: - path: /.well-known/security.txt status: 200 file: entergram-security.txt - 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/ai-plugin.json status: 404 - path: /apis.json status: 404 - path: /.well-known/apis.json status: 404 - path: /.well-known/agent-card.json status: 404 - path: /.well-known/agent.json status: 404 - host: https://www.entergram.com documents: - path: /.well-known/security.txt status: 200 file: entergram-security.txt - host: https://api.entergram.com documents: - path: /.well-known/security.txt status: 200 file: entergram-security.txt - path: /.well-known/openid-configuration status: 404 - path: /openapi.json status: 200 note: OpenAPI 3.1.0 contract (saved to openapi/entergram-openapi.json) - host: https://mcp.entergram.com documents: - path: /.well-known/oauth-authorization-server status: 200 file: entergram-oauth-authorization-server.json - path: /.well-known/oauth-protected-resource status: 200 file: entergram-oauth-protected-resource.json - path: /.well-known/openid-configuration status: 404 - path: /.well-known/agent-card.json status: 404 - path: /.well-known/agent.json status: 404 - host: https://app.entergram.com documents: - path: /.well-known/oauth-authorization-server status: 200 file: entergram-app-oauth-authorization-server.json bytes: 1530 path_echo_control: passed x-mcp-probe: probed: '2026-09-19' issue: roadmap#321, roadmap#337 documents: - host: https://app.entergram.com path: /.well-known/oauth-authorization-server file: entergram-app-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