# Participant object

Fields returned by the REST API for participant object.

## Fields

| Field | Type | Meaning |
| --- | --- | --- |
| `id` | string | Resource identifier. |
| `roomId` | string | Owning room. |
| `externalId` | string or null | External identity, or null. |
| `name` | string | Display name. |
| `metadata` | object | Application-defined JSON object. |
| `role` | string | Participant role. |
| `joinedAt` | string | Join timestamp. |
| `leftAt` | string or null | Leave timestamp, or null. |

## Example

```json
{
  "id": "participant_example",
  "roomId": "room_example",
  "externalId": null,
  "name": "Alice",
  "metadata": {},
  "role": "participant",
  "joinedAt": "2026-01-01T12:00:00.000Z",
  "leftAt": null
}
```