generated: '2026-08-22' method: searched source: probed live on 2026-08-22 against every Holmusk / NeuroBlu host found via certificate transparency (api.certspotter.com) and the corporate + product sites note: >- One real document was served: https://app.neuroblu.ai/.well-known/security.txt (HTTP 200, content-type text/plain, 73 bytes, nginx last-modified 2026-08-12). It is genuine, not the catch-all — every OTHER path on app.neuroblu.ai answers 200 with the same 827-byte React SPA shell (content-type text/html), which is recorded below as status 200 with soft_404: true and file: null so it is never credited as a document. The corporate site (www.holmusk.com) and the product marketing site (www.neuroblu.ai) are Webflow and return a real 404 for every /.well-known/ path. The security.txt Expires field (2025-12-31) is in the past, so the document is served but STALE under RFC 9116. hit_count: 1 soft_404_control: host: https://app.neuroblu.ai path: /.well-known/this-path-does-not-exist-ae-probe status: 200 bytes: 827 content_type: text/html note: SPA catch-all; any 200 of this exact size/type on this host is not a document. hosts: - host: https://app.neuroblu.ai documents: - path: /.well-known/security.txt status: 200 content_type: text/plain bytes: 73 file: holmusk-security.txt - path: /.well-known/openid-configuration status: 200 soft_404: true file: null - path: /.well-known/oauth-authorization-server status: 200 soft_404: true file: null - path: /.well-known/oauth-protected-resource status: 200 soft_404: true file: null - path: /.well-known/api-catalog status: 200 soft_404: true file: null - path: /.well-known/ai-plugin.json status: 200 soft_404: true file: null - path: /.well-known/agent-card.json status: 200 soft_404: true file: null - path: /.well-known/agent.json status: 200 soft_404: true file: null - host: https://www.holmusk.com documents: - path: /.well-known/security.txt status: 404 file: null - path: /.well-known/openid-configuration status: 404 file: null - path: /.well-known/oauth-authorization-server status: 404 file: null - path: /.well-known/api-catalog status: 404 file: null - path: /.well-known/ai-plugin.json status: 404 file: null - host: https://www.neuroblu.ai documents: - path: /.well-known/security.txt status: 404 file: null - path: /.well-known/openid-configuration status: 404 file: null - path: /.well-known/oauth-authorization-server status: 404 file: null - path: /.well-known/api-catalog status: 404 file: null - path: /.well-known/ai-plugin.json status: 404 file: null - host: https://insights.neuroblu.ai documents: - path: /.well-known/security.txt status: 404 file: null - path: /.well-known/api-catalog status: 404 file: null - host: https://policy.holmusk.com documents: - path: /.well-known/security.txt status: 404 file: null - path: /.well-known/api-catalog status: 404 file: null - host: https://info.holmusk.com documents: - path: /.well-known/security.txt status: 404 file: null - path: /.well-known/api-catalog status: 404 file: null