generated: '2026-09-06'
method: probed
source: >-
  Direct HTTP probes on 2026-09-06 of every host this record knows — the registrable
  domain altusgroup.com and its www host, the ARGUS Cloud portal host
  cloud.altusplatform.com named by the Portal pointer, and service.altusgroup.com,
  the Altus Group customer service portal linked from the ARGUS Developer solution page.
provider: ARGUS Developer
providerId: argus-developer
description: >-
  Well-known discovery probe for ARGUS Developer (Altus Group). One real document was
  served: an OpenID Connect discovery document at service.altusgroup.com, the Salesforce
  Experience Cloud-backed Altus Group customer service and knowledge-base portal. It
  describes the identity surface customers authenticate against for support and portal
  access, NOT an ARGUS Developer product API — ARGUS Developer publishes no public API.
  Every other path on every host 404d or returned an SPA shell.
notes:
  - >-
    cloud.altusplatform.com is a single-page application with a catch-all route — it
    answers HTTP 200 with the same ~2KB "ARGUS Cloud" HTML shell for EVERY path,
    including a deliberately nonsensical control path
    (/nonexistent-path-check-12345, 200 text/html 2037 bytes). None of its 200s are
    documents and none are counted as hits.
  - >-
    www.altusgroup.com is a Next.js site that returns a real HTTP 404 with an
    __next_error__ body for unmatched paths, so its 404s are genuine.
  - >-
    service.altusgroup.com answers 401 for all other /.well-known/ paths, which is the
    Salesforce community default, not a suppressed document.
hosts:
  - host: www.altusgroup.com
    documents:
      - 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/api-catalog
        status: 404
      - path: /.well-known/ai-plugin.json
        status: 404
      - path: /.well-known/agent-card.json
        status: 404
      - path: /.well-known/agent.json
        status: 404
      - path: /llms.txt
        status: 404
  - host: altusgroup.com
    documents:
      - 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/api-catalog
        status: 404
      - path: /.well-known/ai-plugin.json
        status: 404
      - path: /.well-known/agent-card.json
        status: 404
      - path: /.well-known/agent.json
        status: 404
      - path: /llms.txt
        status: 404
  - host: cloud.altusplatform.com
    documents:
      - path: /.well-known/security.txt
        status: 200
        note: SPA catch-all HTML shell, not a document — treated as a miss
      - path: /.well-known/openid-configuration
        status: 200
        note: SPA catch-all HTML shell, not a document — treated as a miss
      - path: /.well-known/oauth-authorization-server
        status: 200
        note: SPA catch-all HTML shell, not a document — treated as a miss
      - path: /.well-known/api-catalog
        status: 200
        note: SPA catch-all HTML shell, not a document — treated as a miss
      - path: /.well-known/ai-plugin.json
        status: 200
        note: SPA catch-all HTML shell, not a document — treated as a miss
      - path: /.well-known/agent-card.json
        status: 200
        note: SPA catch-all HTML shell, not a document — treated as a miss
      - path: /.well-known/agent.json
        status: 200
        note: SPA catch-all HTML shell, not a document — treated as a miss
      - path: /llms.txt
        status: 200
        note: SPA catch-all HTML shell, not a document — treated as a miss
  - host: service.altusgroup.com
    documents:
      - path: /.well-known/openid-configuration
        status: 200
        content_type: application/json;charset=UTF-8
        file: argus-developer-openid-configuration.json
        note: >-
          Real OpenID Connect discovery document, issuer https://service.altusgroup.com.
          Salesforce Experience Cloud identity provider fronting the Altus Group customer
          service portal linked from the ARGUS Developer solution page.
      - path: /.well-known/security.txt
        status: 401
      - path: /.well-known/oauth-authorization-server
        status: 401
      - path: /.well-known/api-catalog
        status: 401
      - path: /.well-known/ai-plugin.json
        status: 401
      - path: /.well-known/agent-card.json
        status: 401
      - path: /.well-known/agent.json
        status: 401
      - path: /llms.txt
        status: 401
maintainers:
  - FN: Kin Lane
    email: kin@apievangelist.com