Skip to content

A custom event occurrence on a custom-object record is sent with `POST /events/v3/send` and `{ eventName: "pe<hubId>_<name>", objectId, occurredAt, properties }`.

Measured

Checked

Checked October 16, 2026 on a HubSpot developer test account

Area

Tags

events, custom-events, send, occurrence

More facts from this area

Custom behavioral events need an Enterprise subscription.Source pending
Dated (2026-09) custom event definition reads carry labels.singular and labels.plural, and no label.Source pending
A flow or list filter's eventTypeId equals the custom event definition's objectTypeId (6-<definition id>); HubSpot's own events appear as 4-<n>.Measured
A custom event's fully qualified name, used to send and read it, is pe<hubId>_<name>, so it differs per portal; its definition also gets an event type ID 6-<n>. Key definitions on name or objectTypeId.Documented and measured
Custom event property enumeration options are stored with their value exactly as sent.Source pending

Spriggit uses these facts when it plans changes. See something out of date? Email [email protected]