generated: '2026-08-13'
method: searched
source: https://developer.goacoustic.com/acoustic-connect/changelog
note: >-
  Acoustic runs exactly one dated developer changelog, and it belongs to Acoustic
  Connect. /acoustic-campaign/changelog and /acoustic-content/changelog both 404,
  and Acoustic Content's "What's new" doc page returns 403 to an anonymous client, so
  the two oldest API estates have no reachable public release history. Acoustic
  Personalization publishes a "What's new" doc page and a library version-history
  page instead of a changelog feed.
changelogs:
- api: Acoustic Connect API
  url: https://developer.goacoustic.com/acoustic-connect/changelog
  scheme: dated-entries
  format: ReadMe changelog
  current_version: null
  version_scheme_note: >-
    The Connect GraphQL API is unversioned in its URL — a single endpoint per region,
    with change communicated through release notes.
  entries:
  - title: Connect API release notes
    date: '2025-09-02'
    breaking: unknown
  - title: Connect Web SDK release notes
    date: '2025-02-17'
    breaking: unknown
  - title: Release notes for mobile Connect SDKs
    date: '2024-11-22'
    breaking: unknown
  - title: Announcing Connect API and SDKs
    date: '2024-11-18'
    breaking: false
    highlights: [Initial public announcement of the Connect API and its SDKs]
  latest_entry: '2025-09-02'
- api: Acoustic Personalization
  url: https://developer.goacoustic.com/acoustic-personalization/docs/whats-new
  scheme: whats-new-page
  entries: []
  note: >-
    A narrative "What's new" page plus a library version-history page
    (personalization-library-all-versions-history); neither carries dated release
    entries in a form that can be structured without guessing.
- api: Acoustic Content API
  url: null
  scheme: none
  entries: []
  note: >-
    /acoustic-content/changelog returns 404 and /acoustic-content/docs/whats-new
    returns 403 anonymously. The only public version signal is info.version in the
    contract itself — 1.0.142, unchanged between the Swagger 2.0 copy on GitHub
    (copyright 2023) and the OpenAPI 3.0.0 copy on the developer portal.
- api: Acoustic Campaign REST API / XML API
  url: null
  scheme: none
  entries: []
  note: /acoustic-campaign/changelog returns 404. No public dated release history.
x-evidence:
- url: https://developer.goacoustic.com/acoustic-connect/changelog
  http_status: 200
- url: https://developer.goacoustic.com/acoustic-campaign/changelog
  http_status: 404
- url: https://developer.goacoustic.com/acoustic-content/changelog
  http_status: 404
- url: https://developer.goacoustic.com/acoustic-content/docs/whats-new
  http_status: 403