curl --request POST \
  --url https://voice-api.onclarity.com/v1/projects/{projectId}/campaigns/{id}/start \
  --header 'Authorization: Bearer <token>'

import requests

url = "https://voice-api.onclarity.com/v1/projects/{projectId}/campaigns/{id}/start"

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

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

print(response.text)

const options = {method: 'POST', headers: {Authorization: 'Bearer <token>'}};

fetch('https://voice-api.onclarity.com/v1/projects/{projectId}/campaigns/{id}/start', options)
  .then(res => res.json())
  .then(res => console.log(res))
  .catch(err => console.error(err));

{
  "campaign": {
    "id": "3f1c2a8e-6b0d-4f6e-9a51-0d2b7c9e4a10",
    "project_id": "8d2e4b1a-1c3f-4e5a-9b7d-6f0a2c4e8b13",
    "name": "March renewals",
    "agent_id": "5b7e9c1d-2a4f-4c6e-8d0b-1f3a5c7e9b24",
    "from_number": "+14155550100",
    "start_time": "2026-03-02T14:00:00.000Z",
    "callback": false,
    "retries": 2,
    "retry_delay_seconds": 3600,
    "max_concurrency": 5,
    "calling_window": null,
    "status": "scheduled",
    "started_at": null,
    "canceled_at": null,
    "ended_at": null,
    "created_at": "2026-02-27T15:12:40.000Z",
    "updated_at": "2026-03-02T14:00:00.000Z"
  }
}

{
  "error": "Invalid or revoked token"
}

{
  "error": "<string>",
  "code": "<string>"
}

{
  "error": "<string>",
  "code": "<string>"
}

{
  "error": "Cannot start a running campaign"
}