const options = {method: 'GET'};

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

{
  "sizes": [
    {
      "name": "small",
      "vcpu": 123,
      "ram_gb": 123,
      "disk_gb": 123,
      "daily_usd": 123,
      "min_balance_usd": 123
    }
  ],
  "default": "small"
}