HubSpot Developer Changelog

At Fall Spotlight on September 15, HubSpot is announcing the end of support for v1-v3 APIs, legacy public apps, and legacy private apps, all with a September 2027 enforcement date. If your integration or ...

This changelog rounds up the developer and builder updates in HubSpot's Fall Spotlight 2026 release: what's now generally available on Developer Platform version 2026.09, the new and

HubSpot is permanently removing the ability to create new legacy, non-Project based, private apps through the account UI. Users needing similar functionality should use Service Keys, available via Developer Platform Projects version 2026.09 ...

HubSpot will sunset the Pipelines API V1 on December 4, 2026. After this date, the API will no longer be supported. If your integration relies on V1 endpoints, you'll need to migrate to the 2026-03 or ...

Node 18.x and 20.x are being deprecated as supported runtimes for Chatflows custom code snippets. If you have bot code ...

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 ...

This month's updates include a raised owner property limit, larger Webhooks Journal batch sizes, and a new historical API usage chart — plus public betas for Contract Imports and the Payment Links API. Read on for the details.

7/23/2026 Edit - The post has been updated to include the Deal object specific ...