# Events

## Send event to instance

**post** `/accounts/{account_id}/workflows/{workflow_name}/instances/{instance_id}/events/{event_type}`

Sends an event to a running workflow instance to trigger state transitions.

### Path Parameters

- `account_id: string`

- `workflow_name: string`

- `instance_id: string`

  Instance identifier. User-created instances match `^[a-zA-Z0-9_][a-zA-Z0-9-_]*$` (max 100 characters); cron-triggered instances can use a longer, system-generated id derived from the cron expression.

- `event_type: string`

### Body Parameters

- `body: optional unknown`

### Returns

- `errors: array of object { code, message }`

  - `code: number`

  - `message: string`

- `messages: array of object { code, message }`

  - `code: number`

  - `message: string`

- `success: true`

  - `true`

- `result: optional unknown`

- `result_info: optional object { count, per_page, total_count, 3 more }`

  - `count: number`

  - `per_page: number`

  - `total_count: number`

  - `cursor: optional string`

  - `page: optional number`

  - `total_pages: optional number`

### Example

```http
curl https://api.cloudflare.com/client/v4/accounts/$ACCOUNT_ID/workflows/$WORKFLOW_NAME/instances/$INSTANCE_ID/events/$EVENT_TYPE \
    -X POST \
    -H "Authorization: Bearer $CLOUDFLARE_API_TOKEN"
```

#### Response

```json
{
  "errors": [
    {
      "code": 0,
      "message": "message"
    }
  ],
  "messages": [
    {
      "code": 0,
      "message": "message"
    }
  ],
  "success": true,
  "result": {},
  "result_info": {
    "count": 0,
    "per_page": 0,
    "total_count": 0,
    "cursor": "cursor",
    "page": 0,
    "total_pages": 0
  }
}
```

## Domain Types

### Event Create Response

- `EventCreateResponse = unknown`