curl --request POST \
  --url https://app.thinnest.ai/api/v1/campaigns/{id}/cancel \
  --header 'Authorization: Bearer <token>'

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

fetch('https://app.thinnest.ai/api/v1/campaigns/{id}/cancel', options)
  .then(res => res.json())
  .then(res => console.log(res))
  .catch(err => console.error(err));

import requests

url = "https://app.thinnest.ai/api/v1/campaigns/{id}/cancel"

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

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

print(response.text)

{
  "id": "cmp_1f2e3d4c-5b6a-4798-8a7b-6c5d4e3f2a1b",
  "agent": "ag_8d7c6b5a-4e3f-4a2b-9c1d-0e9f8a7b6c5d",
  "name": "Six-month check-up reminders",
  "kind": "voice",
  "status": "cancelled",
  "template": null,
  "purpose": "Hello, this is Asha calling from Sunrise Dental Clinic.",
  "counts": {
    "recipients": 180,
    "sent": 0,
    "delivered": 0,
    "read": 0,
    "replied": 0,
    "failed": 0,
    "skipped": 0
  },
  "scheduledAt": "2026-10-07T04:30:00.000Z",
  "startedAt": null,
  "finishedAt": "2026-10-06T10:20:05.118Z",
  "createdAt": "2026-10-06T10:00:01.874Z",
  "lastError": null
}

{
  "error": "Send a valid API key as `Authorization: Bearer <key>`."
}

{
  "error": "This API key is read-only: it can read everything but change nothing."
}

{
  "error": "That campaign was not found."
}

{
  "error": "Only a draft, sending or paused campaign can be cancelled. This one is sent."
}

{
  "error": "Over 240 requests a minute. Slow down and retry."
}