const response = await fetch(
  "https://api.socialfetch.dev/v1/tiktok/videos/download?url=https://www.tiktok.com/@mrbeast/video/7596844935442189598",
  {
    headers: {
      "x-api-key": "YOUR_API_KEY"
    }
  }
);

const data = await response.json();
console.log(data);