generated: '2026-07-28'
method: searched
source: >-
  https://developer.heathrow.com/api-changelog, https://developer.heathrow.com/apis,
  https://developer.heathrow.com/products, https://developer.heathrow.com/api-flights,
  https://developer.heathrow.com/sitemap.xml, and DNS/HTTP probes for a status
  page on 2026-07-28.
description: >-
  Heathrow publishes no lifecycle contract for its API programme. There is no
  versioning scheme, no deprecation or sunset policy, no SLA and no status page.
  A changelog page exists and is linked from the portal navigation, but it
  renders with the heading "API changelog" and zero entries. The only
  availability statement anywhere is unquantified marketing prose on the Flights
  API page: "We monitor our APIs constantly to offer the best performance and up
  time possibile to all developers."
versioning:
  scheme: null
  current: null
  mechanism: null
  docs: null
  notes: >-
    No version identifier appears in any public portal page, and the Azure APIM
    /apiVersionSets management endpoint returns {"value":[],"count":0}
    anonymously. Whether the gated APIs are versioned at all is not observable.
deprecation:
  policy_url: null
  sunset_header: false
  notes: >-
    No deprecation policy, no RFC 8594 Sunset/Deprecation header support
    documented, and no notice period committed to. The portal sitemap lists
    /documentation/requesting-a-client-certificate, which itself now returns 404
    - a documented process whose document has already rotted, which is the only
    lifecycle signal available.
sla:
  url: null
  uptime_target: null
  notes: >-
    No SLA and no numeric uptime target is published. The Flights API page
    carries only the sentence "We monitor our APIs constantly to offer the best
    performance and up time possibile to all developers." The developer portal's
    own Terms and Conditions page is boilerplate governing careers.heathrow.com,
    so there are no API service commitments of any kind in force publicly.
status_page: null
status_page_probes:
  - url: https://status.heathrow.com/
    status: 0
    note: Does not resolve.
  - url: https://developer.heathrow.com/status
    status: 404
changelog:
  url: https://developer.heathrow.com/api-changelog
  status: 200
  entries_published: 0
  note: Page renders the heading "API changelog" and nothing else.
  detail: changelog/heathrow-airport-changelog.yml
deprecated_operations: []
notes: >-
  No StatusPage or Deprecation pointer is emitted in apis.yml because neither
  artefact exists - emitting one would be fabrication. The Lifecycle pointer
  records the absence.