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

fetch('https://blackbox.dasha.ai/api/v1/rag/kb/{kbId}/sources/{sourceId}', options)
  .then(res => res.json())
  .then(res => console.log(res))
  .catch(err => console.error(err));

curl --request DELETE \
  --url https://blackbox.dasha.ai/api/v1/rag/kb/{kbId}/sources/{sourceId} \
  --header 'Authorization: Bearer <token>'

import requests

url = "https://blackbox.dasha.ai/api/v1/rag/kb/{kbId}/sources/{sourceId}"

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

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

print(response.text)