ST-2026-185 · API endpoints & versions
Microsoft retires the Partner Center Check Inventory API on 25 September
Microsoft will retire the Partner Center /v1/extensions/product/checkinventory endpoint on 25 September 2026 and directs integrations to Check Inventory by Resource Type, which requires resourceType while retaining the documented inventory response model.
Previous state
Partner Center integrations could query inventory through /v1/extensions/product/checkinventory without the replacement endpoint's required resourceType parameter.
Current state
The legacy Check Inventory endpoint retires on 25 September 2026; integrations must use the Check Inventory by Resource Type API and provide resourceType.
Affected users
Who needs to care
Partner Center integrations that call the legacy Check Inventory endpoint for product inventory availability.
Required response
What to do
Move inventory calls to /v1/extensions/product/checkinventorybyresourcetype, provide the required resourceType parameter, and validate the replacement flow before 25 September.
Evidence boundary
What the source does not prove
Microsoft's dedicated legacy API documentation states the 25 September retirement and directs partners to the resource-type API. The replacement API documentation establishes the required resourceType query parameter. This record does not infer changes to unrelated Partner Center APIs.
Lifecycle history
Dated event sequence
- Legacy API documentation records retirement
Microsoft's Check Inventory API page states that the API will retire on 25 September 2026 and directs partners to Check Inventory by Resource Type.
- Replacement API documentation updated
Microsoft's replacement API documentation lists resourceType as a required query parameter.
- Legacy endpoint retirement
The legacy Check Inventory API reaches its documented retirement date.
Evidence ledger
First-party sources
- 01Microsoft Learn — Check the inventory of catalog items using Partner Center APIs
Official Partner Center legacy API documentation · 2026-06-24
Open official source ↗ - 02Microsoft Learn — Check inventory by resource type using Partner Center APIs
Official Partner Center replacement API documentation · 2026-07-22
Open official source ↗