## Get activity

`GET /v1/activities/:id`

Returns an activity by ID with all fields.

## Parameters

| Parameter | Type | Required | Description |
|----------|-----|:-----:|---------|
| `id` (path) | number | yes | Activity ID |

## Examples

### curl — personal key

```bash
curl "https://vibecode.bitrix24.com/v1/activities/3894" \
  -H "X-Api-Key: YOUR_API_KEY"
```

### curl — OAuth application

```bash
curl "https://vibecode.bitrix24.com/v1/activities/3894" \
  -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/activities/3894', {
  headers: {
    'X-Api-Key': 'YOUR_API_KEY',
  },
})

const { success, data } = await res.json()
console.log('Activity:', data.subject, '— completed:', data.completed)
```

### JavaScript — OAuth application

```javascript
const res = await fetch('https://vibecode.bitrix24.com/v1/activities/3894', {
  headers: {
    'X-Api-Key': 'YOUR_APP_KEY',
    'Authorization': 'Bearer USER_SESSION_TOKEN',
  },
})

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

## Response fields

The activity object with all fields — see [Activity fields](/docs/entities/activities/fields).

## Response example

```json
{
  "success": true,
  "data": {
    "id": 3894,
    "typeId": 1,
    "ownerTypeId": 2,
    "ownerId": 741,
    "subject": "Project meeting",
    "description": "Discussing delivery terms",
    "responsibleId": 1,
    "priority": 2,
    "direction": 2,
    "completed": false,
    "startTime": "2026-04-16T10:00:00+00:00",
    "endTime": "2026-04-16T11:00:00+00:00",
    "deadline": "2026-04-16T11:00:00+00:00",
    "createdAt": "2026-04-15T14:30:00+00:00",
    "updatedAt": "2026-04-15T14:30:00+00:00"
  }
}
```

## Error response example

404 — activity not found:

```json
{
  "success": false,
  "error": {
    "code": "ENTITY_NOT_FOUND",
    "message": "Item not found"
  }
}
```

## Errors

| HTTP | Code | Description |
|------|-----|---------|
| 404 | `ENTITY_NOT_FOUND` | Activity with this ID not found |
| 403 | `ACCESS_DENIED` | No access to the activity |
| 403 | `SCOPE_DENIED` | The API key lacks the `crm` scope |
| 401 | `TOKEN_MISSING` | The API key has no configured tokens |

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

## See also

- [Update activity](/docs/entities/activities/update) — changing fields
- [List activities](/docs/entities/activities/list) — search with filters
- [Activity fields](/docs/entities/activities/fields) — description of all fields
- [Limits and optimization](/docs/optimization) — rate limits