June 30, 2026 release

API	Change Type	Release Date	Description
Inventory	Optional	06/26/2026	Added optional response property `payload/inventory/items/inventoryData/reservedUnits` in: `GET /v3/wfs/inventory` (200)
Advertising	Added	06/29/2026	Added NEW endpoints: `POST /v3/advertising/sem/campaigns/recommendations/search` `GET /v3/advertising/sem/item-issues/issue-types` `POST /v3/advertising/sem/item-issues/search`
Notifications	Changed	06/26/2026	Updated notification schemas and examples across: `GET /v3/webhooks/subscriptions` `POST /v3/webhooks/subscriptions` `PATCH /v3/webhooks/subscriptions/{subscriptionId}` `POST /v3/webhooks/test` Changes include: - Replaced rigid `Headers` properties with `additionalProperties: { "type": "string" }` - Updated description to use optional custom headers for notification delivery - Replaced example header values with custom header examples - Restored headers to `POST /v3/webhooks/test` - Updated related component schemas, including `components/schemas/Headers` and `TestNotificationRequest`