generated: '2026-08-13'
method: searched
source: https://docs.developers.optimizely.com/content-marketing-platform/changelog
description: >-
  Optimizely publishes a dated, per-product API changelog inside its ReadMe developer
  portal. There is no single network-wide changelog — each product area has its own, and
  they are maintained at very different cadences. Every changelog page is also served as
  markdown by appending .md, which makes the whole history machine-readable.
scheme: dated-entries
versioning: none-per-entry
note: >-
  Entries are dated and titled but carry no version number — Optimizely versions its APIs
  in the URI path (v2, flags/v1, ODP v3, CMP v3) and does not tag changelog entries to a
  release. Product release notes (feature-level, not API-level) are published separately in
  the support help center.
changelogs:
- product: Content Marketing Platform (CMP)
  url: https://docs.developers.optimizely.com/content-marketing-platform/changelog
  cadence: active
  latest_entry: '2026-07-22'
  note: The most actively maintained API changelog in the network — 7 pages of entries, 10 in the last 6 months.
- product: Feature Experimentation
  url: https://docs.developers.optimizely.com/feature-experimentation/changelog
  cadence: dormant
  latest_entry: '2025-05-29'
  note: >-
    STALENESS SIGNAL — the newest Feature Experimentation API changelog entry is from
    2025-05-29, more than 14 months before this probe, even though the Flags v1 spec is at
    0.3.7 and the SDKs shipped throughout 2026.
- product: Platform (Optimizely Graph)
  url: https://docs.developers.optimizely.com/platform-optimizely/changelog
  cadence: minimal
  latest_entry: null
  note: A single "Welcome to Platform" entry; no dated API change history yet.
- product: Feature Experimentation (product release notes)
  url: https://support.optimizely.com/hc/en-us/articles/7663600395021-2026-Optimizely-Feature-Experimentation-release-notes
  cadence: active
  kind: release-notes
- product: Web Experimentation (product release notes)
  url: https://support.optimizely.com/hc/en-us/articles/23949705057421-2026-Optimizely-Web-Experimentation-release-notes
  cadence: active
  kind: release-notes
entries:
- date: '2026-07-22'
  product: Content Marketing Platform
  title: API update
  breaking: false
  additions:
  - Added an `is_protected` boolean to the marketing work request form-field response (GET work request and GET template) marking read-only, admin-only fields.
  url: https://docs.developers.optimizely.com/content-marketing-platform/changelog/api-update-17
- date: '2026-07-19'
  product: Content Marketing Platform
  title: API update
  breaking: false
  additions:
  - Added a `status` query parameter to `GET /tasks` accepting an array of Archived, Completed, Overdue, Not Started, In Progress, On Hold.
  url: https://docs.developers.optimizely.com/content-marketing-platform/changelog/api-update-16
- date: '2026-07-15'
  product: Content Marketing Platform
  title: API update
  breaking: false
  additions:
  - Added `allow_se_indexing` to `PATCH /images/{id}`, `PATCH /videos/{id}` and `PATCH /raw-files/{id}` controlling search-engine indexing of Library assets.
  url: https://docs.developers.optimizely.com/content-marketing-platform/changelog/api-update-15
- {date: '2026-07-02', product: Content Marketing Platform, title: API update, breaking: false, url: 'https://docs.developers.optimizely.com/content-marketing-platform/changelog/api-update-14'}
- {date: '2026-07-01', product: Content Marketing Platform, title: API update, breaking: false, url: 'https://docs.developers.optimizely.com/content-marketing-platform/changelog/api-update-13'}
- {date: '2026-06-07', product: Content Marketing Platform, title: API update and bugfixes, breaking: false, url: 'https://docs.developers.optimizely.com/content-marketing-platform/changelog/api-update-12'}
- {date: '2026-05-24', product: Content Marketing Platform, title: New endpoint, breaking: false, url: 'https://docs.developers.optimizely.com/content-marketing-platform/changelog/new-endpoint-25'}
- {date: '2026-04-07', product: Content Marketing Platform, title: New endpoint, breaking: false, url: 'https://docs.developers.optimizely.com/content-marketing-platform/changelog/api-update-11'}
- {date: '2026-02-25', product: Content Marketing Platform, title: API update, breaking: false, url: 'https://docs.developers.optimizely.com/content-marketing-platform/changelog/api-update-10'}
- {date: '2026-02-09', product: Content Marketing Platform, title: API update, breaking: false, url: 'https://docs.developers.optimizely.com/content-marketing-platform/changelog/api-update-9'}
- date: '2025-05-29'
  product: Feature Experimentation
  title: Metrics API updates
  breaking: true
  removals:
  - Removed the `/metrics` endpoints from the Optimizely API; callers must move to the Metrics Hub Service API `/metrics` endpoints.
  url: https://docs.developers.optimizely.com/feature-experimentation/changelog/api-updates-2
- date: '2025-05-07'
  product: Feature Experimentation
  title: API updates
  breaking: false
  highlights:
  - '`list_change_history` now returns a 200 with an empty body for an out-of-range page number instead of a 404.'
  url: https://docs.developers.optimizely.com/feature-experimentation/changelog/api-updates
- date: '2025-03-18'
  product: Feature Experimentation
  title: New endpoints
  breaking: false
  additions:
  - Permission Service endpoints for granular roles and permissions — entity permissions for users and teams, plus team management (get/create/update/delete team).
  url: https://docs.developers.optimizely.com/feature-experimentation/changelog/new-endpoints
- {date: '2025-02-20', product: Feature Experimentation, title: API updates, breaking: false, url: 'https://docs.developers.optimizely.com/feature-experimentation/changelog/api-updates-1'}
summary:
  entry_count: 14
  window: 2025-02-20 to 2026-07-22
  breaking_changes: 1
  machine_readable: true