generated: '2026-09-05'
method: searched
source: https://support.75f.io/hc/en-us/articles/5459129016595-75F-External-API-s-Overview
versioning:
  scheme: uri-path
  current: 'Haystack surface: unversioned (/ph); Special Schedules: v2'
  policy: >-
    75F states it "aims to be backward compatible with previous versions of the API and to protect
    implementations from breaking when new features or changes are implemented." That is a stated intent
    rather than a dated support policy; no version-support matrix or end-of-life calendar is published.
  docs: https://support.75f.io/hc/en-us/articles/5459129016595-75F-External-API-s-Overview
deprecation:
  policy_url: null
  sunset_header: false
  deprecation_header: false
  note: >-
    No deprecation policy, no RFC 8594 Sunset/Deprecation header support and no advance-notice window
    are published. No Deprecation pointer is emitted in apis.yml, because 75F publishes no such policy.
sla:
  url: null
  uptime_target: null
  note: >-
    No public SLA or uptime commitment. Availability is reported after the fact on the status page,
    which is subscribable but publishes no target.
status_page:
  url: https://75f.statuspage.io/
  provider: Atlassian Statuspage
  machine_readable: https://75f.statuspage.io/api/v2/summary.json
  probed: '2026-09-05'
  http_status: 200
  indicator_at_probe: none — All Systems Operational
  note: >-
    Unusually granular for this sector: the page decomposes the platform into 21 named services and
    several are API surfaces in their own right, which is the clearest public statement 75F makes about
    how its API estate is partitioned.
  components:
  - {name: Haystack API, description: Digital twin and historian API}
  - {name: External API}
  - {name: Scheduling API}
  - {name: Messaging API}
  - {name: Summary Table API}
  - {name: Point Summary API}
  - {name: Notes API}
  - {name: External Service API, description: subscription-management app service}
  - {name: Gatekeeper Service}
  - {name: Caretaker Service, description: authorization service for users and sites}
  - {name: User Management}
  - {name: Site Manager}
  - {name: Domain Modeler}
  - {name: Portfolio Analytics}
  - {name: Alerts Service}
  - {name: Alert Builder Service}
  - {name: Chiller Plant Service}
  - {name: Sequence Runner Service}
  - {name: Version Management Service}
  - {name: Weather Data Service}
  - {name: Remote Access}
release_cadence:
  cadence: monthly
  detail: Dated monthly release notes published in the help center since 2022.
  artifact: changelog/75f-changelog.yml
deprecated_operations: []
corporate:
  acquisition:
    acquirer: Carrier Global Corporation
    announced: '2026-07-23'
    business_unit: Carrier Software & Controls Solutions
    source: https://www.75f.io/news/carrier-acquisition-of-75f/
    note: >-
      Recorded because it is the most likely near-term source of change to this API's lifecycle. As of
      this probe the 75F developer surface, gateway host and documentation are unchanged and Carrier
      states there are no immediate changes for customers or partners.