HubSpot Updates
HubSpot Retires Legacy APIs in 2027: What to Do Now
HubSpot will stop supporting API versions v1 to v3, legacy public apps and legacy private apps in September 2027, and v4 on March 30, 2027. If your company runs any custom HubSpot integration, list your legacy apps and their owners now and budget the migration for the first half of 2027.
September 20, 2026