## List participants

`GET /v1/bots/:botId/chats/:dialogId/users`

Returns the list of chat participants. The bot must be a participant of the chat.

## Parameters

| Parameter | Type | Req. | Default | Description |
|----------|-----|:-----:|-----------|---------|
| `botId` (path) | number | yes | — | Bot ID |
| `dialogId` (path) | string | yes | — | Dialog ID (`chatXXX`) |
| `limit` (query) | number | no | `50` | Number of records (1-200) |

## Examples

### curl — personal key

```bash
curl "https://vibecode.bitrix24.com/v1/bots/42/chats/chat456/users?limit=100" \
  -H "X-Api-Key: YOUR_API_KEY"
```

### curl — OAuth application

```bash
curl "https://vibecode.bitrix24.com/v1/bots/42/chats/chat456/users?limit=100" \
  -H "X-Api-Key: YOUR_APP_KEY" \
  -H "Authorization: Bearer USER_SESSION_TOKEN"
```

### JavaScript — personal key

```javascript
const res = await fetch('https://vibecode.bitrix24.com/v1/bots/42/chats/chat456/users?limit=100', {
  headers: {
    'X-Api-Key': 'YOUR_API_KEY',
  },
})

const { success, data } = await res.json()
console.log('Participants:', data.length)
```

### JavaScript — OAuth application

```javascript
const res = await fetch('https://vibecode.bitrix24.com/v1/bots/42/chats/chat456/users?limit=100', {
  headers: {
    'X-Api-Key': 'YOUR_APP_KEY',
    'Authorization': 'Bearer USER_SESSION_TOKEN',
  },
})

const { success, data } = await res.json()
```

## Response fields

| Field | Type | Description |
|------|-----|---------|
| `data` | array | Array of participants |
| `data[].id` | number | User ID |
| `data[].name` | string | Full name |
| `data[].firstName` | string | First name |
| `data[].lastName` | string | Last name |
| `data[].workPosition` | string | Position |
| `data[].color` | string | Avatar color |
| `data[].avatar` | string | Avatar URL |
| `data[].gender` | string | Gender |
| `data[].active` | boolean | Whether the account is active |
| `data[].bot` | boolean | Whether it is a bot |
| `data[].status` | string | User status |

## Response example

```json
{
  "success": true,
  "data": [
    {
      "id": 1,
      "name": "John Smith",
      "firstName": "John",
      "lastName": "Smith",
      "workPosition": "Manager",
      "color": "AZURE",
      "avatar": "",
      "gender": "M",
      "active": true,
      "bot": false,
      "status": "online"
    },
    {
      "id": 42,
      "name": "Support",
      "firstName": "Support",
      "lastName": "",
      "workPosition": "Assistant",
      "color": "AZURE",
      "avatar": "",
      "gender": "",
      "active": true,
      "bot": true,
      "status": "online"
    }
  ]
}
```

## Error response example

502 — the bot is not a participant of the chat:

```json
{
  "success": false,
  "error": {
    "code": "BITRIX_ERROR",
    "message": "Access denied"
  }
}
```

## Errors

| HTTP | Code | Description |
|------|-----|---------|
| 400 | `INVALID_BOT_ID` | `botId` is not a number |
| 404 | `BOT_NOT_FOUND` | No bot found with this ID |
| 403 | `BOT_ACCESS_DENIED` | The bot belongs to another API key |
| 502 | `BITRIX_ERROR` | Bitrix24 error (error text in `message`) |
| 403 | `SCOPE_DENIED` | The API key does not have the `imbot` scope |
| 401 | `TOKEN_MISSING` | The API key has no configured tokens |

Full list of common API errors — [Errors](/docs/errors).

## See also

- [Add participants](/docs/bots/chats/user-add)
- [Remove a participant](/docs/bots/chats/user-delete)
- [Add managers](/docs/bots/chats/manager-add)
- [Bot platform](/docs/bots)
- [Limits and optimization](/docs/optimization)