const options = {method: 'GET', headers: {'X-Browser-Use-API-Key': '<api-key>'}};

fetch('https://api.browser-use.com/api/v3/boxes/me/windows', options)
  .then(res => res.json())
  .then(res => console.log(res))
  .catch(err => console.error(err));

{
  "windows": [
    {
      "id": "<string>",
      "label": "",
      "attached": false,
      "created_at": 0
    }
  ]
}