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This event is fired when a field is set on an account for the first time. Account fields are the new name for tenant fields: data from your CRM or your own systems stored on an account. externalFieldId identifies the field, and accountId is the account it belongs to. Only the value property that matches the field type is set: stringValue, numberValue, booleanValue, stringArrayValue, dateValue, or referenceValues. The rest are null. This event was added in webhook version 2026-10-06. Targets on earlier versions don’t receive it.

Schema

View JSON Schema → Example:

Using the Webhooks SDK

You can use the @team-plain/webhooks package to parse and verify this event with full type safety: