generated: '2026-07-19'
method: searched
source: live probes of /.well-known/* on Horizon3.ai hosts
notes: >-
  The MCP OAuth 2.1 authorization server (oauth-proxy.horizon3ai.com, surfaced via
  mcp.horizon3ai.com) publishes real RFC 8414 / RFC 9728 / OIDC discovery documents.
  The portal.horizon3ai.com SPA returns HTTP 200 with a text/html app shell for any
  /.well-known/* path (not real discovery docs) so those are recorded as not-present.
hosts:
- host: https://mcp.horizon3ai.com
  documents:
  - path: /.well-known/oauth-authorization-server
    status: 200
    content_type: application/json
    file: horizon3ai-mcp-oauth-authorization-server.json
  - path: /.well-known/oauth-protected-resource
    status: 200
    content_type: application/json
    file: horizon3ai-mcp-oauth-protected-resource.json
  - path: /.well-known/openid-configuration
    status: 200
    content_type: application/json
    file: horizon3ai-mcp-openid-configuration.json
- host: https://api.gateway.horizon3ai.com
  documents:
  - path: /.well-known/security.txt
    status: 404
  - path: /.well-known/openid-configuration
    status: 404
  - path: /.well-known/oauth-authorization-server
    status: 404
- host: https://horizon3.ai
  documents:
  - path: /.well-known/security.txt
    status: 404
- host: https://portal.horizon3ai.com
  documents:
  - path: /.well-known/security.txt
    status: 200
    content_type: text/html
    note: SPA app-shell HTML, not a real RFC 9116 security.txt
  - path: /.well-known/oauth-authorization-server
    status: 200
    content_type: text/html
    note: SPA app-shell HTML, not real discovery metadata
  - path: /.well-known/openid-configuration
    status: 200
    content_type: text/html
    note: SPA app-shell HTML, not real discovery metadata