generated: '2026-09-05'
method: searched
source: >-
  https://documentation.ubuntu.com/lxd/latest/api-extensions/,
  https://snapcraft.io/docs/reference/release-notes/,
  https://documentation.ubuntu.com/landscape/reference/release-notes/,
  https://ubuntu.com/about/release-cycle
provider: Canonical
providerId: canonical
description: >-
  Canonical publishes change history per product, not per company and not per API. There is no single
  Canonical API changelog. The most useful one for an API consumer is the LXD api-extensions list,
  which is genuinely an API change log: every entry is a named, appended capability that a client can
  test for at runtime on GET /1.0.
scheme:
  style: per-product release notes plus, for LXD, a runtime capability list
  dated: partial
  note: >-
    HONEST GAP: the LXD api-extensions page names each capability but does not date the entries, so a
    consumer cannot tell from the page when an extension shipped — only that it exists in a given
    build. The Ubuntu release cycle page is the one fully dated surface in the portfolio.
sources:
  - product: LXD
    api: canonical:lxd-rest-api
    url: https://documentation.ubuntu.com/lxd/latest/api-extensions/
    kind: api-capability-list
    machine_readable: true
    machine_readable_note: >-
      The same list is served as the api_extensions[] array on GET /1.0 of any LXD server, which
      makes it the only Canonical change history an agent can read at runtime rather than scrape.
    recent_entries_note: >-
      Entries are appended, never removed, and the array on a live server IS the changelog for that
      build. No dates are published against entries.
  - product: snapd / Snapcraft
    api: canonical:snapd-rest-api
    url: https://snapcraft.io/docs/reference/release-notes/
    kind: release-notes
    dated: true
  - product: Landscape
    api: canonical:landscape-api
    url: https://documentation.ubuntu.com/landscape/reference/release-notes/
    kind: release-notes
    dated: true
    note: >-
      Landscape versions track the Ubuntu LTS scheme — 24.04 LTS, 26.04 LTS — and the release notes
      page carries per-release upgrade guidance.
  - product: Ubuntu
    url: https://ubuntu.com/about/release-cycle
    kind: release-calendar
    dated: true
    note: >-
      The authoritative dated surface. Every Ubuntu release, its release date, its end of standard
      support and its end of ESM are published on one page.
  - product: Canonical (company-wide announcements)
    url: https://canonical.com/blog
    feed: https://canonical.com/blog/feed/
    kind: blog
    dated: true
gaps:
  - No per-API changelog for the Snap Store Device API, the Charmhub API, or the Launchpad Web Services API.
  - No RSS/Atom feed dedicated to API changes on any product.
  - LXD api-extensions entries carry no dates.