Starting with the /2026-09/ API version shipping on September 8, 2026, HubSpot will enforce admin-configured validation rules on all CRM API write paths. If your integration creates or updates CRM records, please make sure that it conforms to the below changes before updating your version of the API.
Summary extracted from the official source text. Verify details on the source page.
| Platform | HubSpot |
|---|---|
| Effective date | 2026-09-08 (passed) |
| Precision | day |
| Published | 2026-08-11 |
| Categories | Breaking / action required |
| Tags | — |
| Official source | HubSpot developer changelog ↗ |
| Fetched | 2026-10-17T03:44:00+00:00 |
| First seen | 2026-10-17T01:05:46+00:00 |
| Status | Listed by the source |
| Stable ID | hubspot-ca8e3356b8 · JSON |