name: Lightspeed Commerce API Changelog
generated: '2026-08-27'
method: searched
source: https://x-series-api.lightspeedhq.com/llms.txt (Changelog section) and https://api-docs.lsk.lightspeed.app/changes
scheme: date-based API versions (YYYY-MM); changelog entries are titled with the version they land in
current_version:
  x_series: '2026-07'
  k_series: 1.0.0 (continuously updated; last structural change 2026-08-20)
feeds:
- product: K-Series
  type: rss
  url: https://api-docs.lsk.lightspeed.app/changes
  note: Bump.sh publishes an RSS subscription and machine-generated structural diffs of the OpenAPI.
entries:
- version: '2026-07'
  title: Voiding of other parked returns
  url: https://x-series-api.lightspeedhq.com/changelog/2026-07-void-other-parked-returns
  product: X-Series
  breaking: unknown
- version: '2026-07'
  title: Prevent mixing of referenced and unreferenced returns
  url: https://x-series-api.lightspeedhq.com/changelog/2026-07-prevent-mixing-of-referenced-and-unreferenced-returns
  product: X-Series
  breaking: likely
  note: A new validation rule on an existing endpoint; previously-accepted payloads may now be rejected.
- version: '2026-07'
  title: Strict Postal Code Validation (40 Countries)
  url: https://x-series-api.lightspeedhq.com/changelog/2026-07-extended-postal-code-validation
  product: X-Series
  breaking: likely
  note: Tightened input validation across 40 countries; addresses that used to save may now 400.
- version: '2026-05'
  title: New Sales Search Filters and Sorting
  url: https://x-series-api.lightspeedhq.com/changelog/2026-05-new-sales-search-filters
  product: X-Series
  breaking: false
- version: '2026-04'
  title: Purchase Order Read API
  url: https://x-series-api.lightspeedhq.com/changelog/2026-04-purchase-order-read-api
  product: X-Series
  breaking: false
- version: '2026-04'
  title: Inventory Levels Reorder Method
  url: https://x-series-api.lightspeedhq.com/changelog/2026-05-inventory-levels-reorder-method
  product: X-Series
  breaking: false
- version: '2026-04'
  title: Deprecation of Sale Fulfillment Endpoints
  url: https://x-series-api.lightspeedhq.com/changelog/2026-05-deprecate-sale-fulfillment-endpoints
  product: X-Series
  breaking: true
  note: The only explicit endpoint deprecation announced in the recent window.
- version: '2026-04'
  title: Reorder Points Support
  url: https://x-series-api.lightspeedhq.com/changelog/2026-05-reorder-points-2026-04
  product: X-Series
  breaking: false
- version: '2026-01'
  title: Adjustment APIs
  url: https://x-series-api.lightspeedhq.com/changelog/2026-05-adjustment-apis-2026-01
  product: X-Series
  breaking: false
- version: '2026-01'
  title: Return Sale Endpoint Method Update
  url: https://x-series-api.lightspeedhq.com/changelog/2026-06-return-sale-post-date-versioned-apis
  product: X-Series
  breaking: true
  note: HTTP method change on the return-sale endpoint for date-versioned APIs.
- date: '2026-08-20'
  title: 'K-Series structural change #13f18639'
  product: K-Series
  url: https://api-docs.lsk.lightspeed.app/changes
  breaking: unknown
  note: >-
    Modified POST /o/op/1/order/local — application/json body, collectionCode and
    orderCollectionTimeAsIso8601 properties modified. Recorded as a machine-generated diff, not prose.
note: >-
  Recent window only. Titles and URLs are taken verbatim from the provider's own changelog index; the
  breaking/additions classification is our reading of the title and is marked `unknown` where the title
  does not say. Lightspeed does not itself label entries breaking or non-breaking.