generated: '2026-08-13'
method: probed
source: >-
  live HTTP redirect chain from atriumhq.com plus the acquirer's product page at
  https://www.fullcast.com/product/fullcast-performance/
scope: product-and-brand-lifecycle
note: >-
  Atrium has no API versioning, deprecation or SLA policy to record because it never
  published a developer API. What this file records instead is the lifecycle event that
  now governs everything on this domain: Atrium was acquired by Fullcast (2025) and the
  product ships as Fullcast Performance. Every marketing path on atriumhq.com answers a
  blanket HTTP 301 to the acquirer's product page; only the customer application login at
  app.atriumhq.com still serves from the Atrium domain.
status: absorbed-by-acquirer
successor:
  company: Fullcast
  product: Fullcast Performance
  url: https://www.fullcast.com/product/fullcast-performance/
  support: https://support.fullcast.com/performance
  catalog_entry: all/fullcast
  note: >-
    The API surface (Fullcast Assistant API, Fullcast MCP Server) is published by Fullcast
    on fullcast.com and is profiled under the fullcast entry. It is deliberately NOT
    mirrored here — it is the acquirer's contract, not Atrium's.
surviving_hosts:
- host: app.atriumhq.com
  role: customer application login
  public_api: false
retired_hosts:
- www.atriumhq.com   # 301 to acquirer
- support.atriumhq.com  # 301 to support.fullcast.com/performance
versioning: null
deprecation: null
sla: null
status_page: null
deprecated_operations: []
evidence:
- url: https://atriumhq.com/
  status: 301
  location: https://www.atriumhq.com/
- url: https://www.atriumhq.com/
  status: 301
  location: https://www.fullcast.com/product/fullcast-performance/
- url: https://support.atriumhq.com/
  status: 200
  final_url: https://support.fullcast.com/performance
- url: https://app.atriumhq.com/
  status: 302
  location: https://app.atriumhq.com/auth/login