> ## Documentation Index
> Fetch the complete documentation index at: https://docs.leadlex.com/llms.txt
> Use this file to discover all available pages before exploring further.

# Start Campaign

> Launch a campaign (sends to Lexi AI for approval)

## Request

### Path Parameters

<ParamField path="id" type="string" required>
  Campaign UUID
</ParamField>

### Headers

```
Authorization: Bearer wbk_your_api_key_here
Content-Type: application/json
```

## Response

<ResponseField name="data" type="object">
  <Expandable title="properties">
    <ResponseField name="campaign_id" type="string">
      Campaign UUID
    </ResponseField>

    <ResponseField name="status" type="string">
      New campaign status (`pending_approval` or `active`)
    </ResponseField>

    <ResponseField name="task_id" type="string">
      Lexi AI task UUID (if approval required)
    </ResponseField>
  </Expandable>
</ResponseField>

<CodeGroup>
  ```bash cURL theme={null}
  curl -X POST \
    https://data.leadlex.com/functions/v1/api-gateway/v1/campaigns/campaign-uuid/start \
    -H "Authorization: Bearer wbk_your_api_key_here" \
    -H "Content-Type: application/json"
  ```

  ```python Python theme={null}
  import requests

  API_KEY = "wbk_your_api_key_here"
  BASE_URL = "https://data.leadlex.com/functions/v1/api-gateway"
  CAMPAIGN_ID = "campaign-uuid"

  headers = {
      "Authorization": f"Bearer {API_KEY}",
      "Content-Type": "application/json"
  }

  response = requests.post(
      f"{BASE_URL}/v1/campaigns/{CAMPAIGN_ID}/start",
      headers=headers
  )

  result = response.json()["data"]
  if result["status"] == "pending_approval":
      print(f"Campaign sent to Lexi for approval: {result['task_id']}")
  else:
      print("Campaign started!")
  ```

  ```javascript JavaScript theme={null}
  const CAMPAIGN_ID = 'campaign-uuid';

  const response = await fetch(
    `https://data.leadlex.com/functions/v1/api-gateway/v1/campaigns/${CAMPAIGN_ID}/start`,
    {
      method: 'POST',
      headers: {
        'Authorization': 'Bearer wbk_your_api_key_here',
        'Content-Type': 'application/json'
      }
    }
  );

  const { data } = await response.json();
  if (data.status === 'pending_approval') {
    console.log(`Campaign sent to Lexi: ${data.task_id}`);
  } else {
    console.log('Campaign started!');
  }
  ```
</CodeGroup>

### Example Response (Approval Required)

```json theme={null}
{
  "data": {
    "campaign_id": "campaign-uuid",
    "status": "pending_approval",
    "task_id": "lexi-task-uuid"
  }
}
```

### Example Response (Auto-Started)

```json theme={null}
{
  "data": {
    "campaign_id": "campaign-uuid",
    "status": "active",
    "task_id": null
  }
}
```

## Approval Workflow

When a campaign requires approval:

1. **Start the campaign** → status becomes `pending_approval`
2. **Lexi reviews** the campaign (template, target list, timing)
3. **You approve or dismiss** via the [Lexi tasks endpoints](/api-reference/lexi/tasks)
4. **Campaign launches** after approval

### Check Approval Status

```python theme={null}
# Poll for task status
tasks_response = requests.get(
    f"{BASE_URL}/v1/lexi/tasks",
    headers=headers,
    params={"status": "pending"}
)
tasks = tasks_response.json()["data"]["tasks"]

for task in tasks:
    if task["type"] == "campaign_start":
        print(f"Campaign {task['metadata']['campaign_id']} awaiting approval")
```

### Approve the Campaign

```python theme={null}
# Approve the task to launch the campaign
task_id = "lexi-task-uuid"
requests.post(
    f"{BASE_URL}/v1/lexi/tasks/{task_id}/approve",
    headers=headers
)
print("Campaign approved and launching!")
```

## Auto-Start vs Manual Approval

<Note>
  Whether a campaign requires Lexi approval depends on your workspace settings. By default, campaigns with >100 recipients require approval.
</Note>

## Errors

| Status | Code                       | Description                          |
| ------ | -------------------------- | ------------------------------------ |
| 400    | `validation_error`         | Campaign is empty or already running |
| 401    | `invalid_key`              | Invalid API key                      |
| 403    | `insufficient_permissions` | Missing `write` permission           |
| 404    | `not_found`                | Campaign not found                   |
| 429    | `rate_limited`             | Rate limit exceeded                  |

### Example Error (Campaign Already Running)

```json theme={null}
{
  "error": {
    "code": "validation_error",
    "message": "Campaign is already active"
  }
}
```