generated: '2026-07-28'
method: searched
source: https://developer.heathrow.com/api-changelog
description: >-
  Heathrow's developer portal ships a dedicated changelog page and links it from
  the portal sitemap, but it publishes no entries. Fetched anonymously on
  2026-07-28 the page returns HTTP 200 and renders the heading "API changelog"
  followed by the site footer - no dates, no versions, no additions, no breaking
  changes. This is recorded as an empty-but-present changelog rather than a
  missing one, because the surface exists and could be populated.
url: https://developer.heathrow.com/api-changelog
status: 200
scheme: null
current_version: null
entries: []
entry_count: 0
observations:
  - date: '2026-07-28'
    note: Page renders with the heading "API changelog" and zero entries to an anonymous visitor.
  - date: '2026-07-28'
    note: >-
      The Azure API Management management endpoint behind the portal returns
      {"value":[],"count":0} for /apis, /products, /tags and /apiVersionSets
      anonymously, and HTTP 401 for /contentTypes/* - so no versioned change
      history is exposed through the management plane either.