generated: '2026-06-20'
method: searched
source: community.workday.com/api changelog links + Adaptive Planning API changelog
scheme: Per-service changelogs tied to Workday feature releases (R1 March, R2 September) and, for SOAP,
  WWS version numbers.
current:
  wws: v45.x (2025R2)
  rest: v1 / v3 (Prism)
changelog_urls:
- service: REST + SOAP API directory
  url: https://community.workday.com/sites/default/files/file-hosting/restapi/index.html
- service: Adaptive Planning REST API
  url: https://doc.workday.com/adaptive-planning/en-us/workday-adaptive-planning-documentation/integration/managing-data-integration/api-documentation/understanding-the-adaptive-planning-rest-api/vmo1623708512342.html
- service: Strategic Sourcing API
  url: https://apidocs.workdayspend.com/
entries:
- release: 2025R2
  date: 2025-09
  type: feature-release
  highlights: Second 2025 major release; new WWS version, REST API additions, and Extend/Prism enhancements.
- release: 2025R1
  date: 2025-03
  type: feature-release
  highlights: First 2025 major release; new WWS version and REST additions.
note: Workday does not publish a single dated public changelog feed; changes are delivered on the twice-yearly
  release train and documented per-service. Recent-window entries above reflect the release cadence, not
  fabricated per-endpoint diffs.