utterance

utterance

An audio message heard (or to be heard) by the User

Data Schema

type: object

Properties

Name	Type	Required	Description
id	string	yes	UUID
transcript	string	yes	Plain text content of the utterance
language	string	yes	BCP47 language tag
timestamp	string	yes	ISO 8601 UTC Date string
isHeard	boolean	yes	Whether utterance has already been heard by the user
interruptedAt	number	no	Playout progress (0.0-1.0) at which playout was interrupted

Example

{
  "kind": "utterance",
  "data": {
    "id": "c10fed62-9074-41e8-ad3b-a2da249714a2",
    "transcript": "Turn left at the lights.",
    "language": "en-US",
    "timestamp": "2026-01-28T09:00:00.000Z",
    "isHeard": true,
    "interruptedAt": 0.749
  }
}