---
title: "Freeze the audience and mark the campaign running"
description: "Materializes the audience into the dispatch ledger, marking contacts with no\nphone or a Do Not Call status as permanently skipped, then sets the campaign\nrunning. Places no calls: the scheduled dispatcher applies pacing, capacity\nand the per-contact calling window, and is the only thing that dials.\n"
---

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

Path: Channel Automation API › Voice AI

`POST /api/voice-campaigns/{campaignId}/start`

Materializes the audience into the dispatch ledger, marking contacts with no
phone or a Do Not Call status as permanently skipped, then sets the campaign
running. Places no calls: the scheduled dispatcher applies pacing, capacity
and the per-contact calling window, and is the only thing that dials.

## Authentication

- `BearerAuth`, http, header `Authorization`, format `JWT`

## Code samples

### cURL

```bash
curl --request POST \
  --url https://api.channelautomation.com/api/voice-campaigns/%7BcampaignId%7D/start \
  --header 'Authorization: Bearer <token>'
```

### TypeScript

```typescript
const url = 'https://api.channelautomation.com/api/voice-campaigns/%7BcampaignId%7D/start';
const options = {method: 'POST', headers: {Authorization: 'Bearer <token>'}};

fetch(url, options)
  .then(res => res.json())
  .then(json => console.log(json))
  .catch(err => console.error(err));
```

### Python

```python
import requests

url = "https://api.channelautomation.com/api/voice-campaigns/%7BcampaignId%7D/start"

headers = {"Authorization": "Bearer <token>"}

response = requests.post(url, headers=headers)

print(response.text)
```

## Responses

### 200

Campaign running


Source: https://developer.channelautomations.com/api/post-api-voice-campaigns-campaign-id-start/index.md