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

fetch('https://api.supermemory.ai/v3/container-tags/{containerTag}', options)
  .then(res => res.json())
  .then(res => console.log(res))
  .catch(err => console.error(err));

{
  "success": true,
  "containerTag": "<string>",
  "deletedDocumentsCount": 123,
  "deletedMemoriesCount": 123
}