curl --request POST \
  --url https://api.iotools.cloud/v1/tool/youtube-thumbnail-downloader \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --data '
{
  "videoUrl": "https://www.youtube.com/watch?v=erLk59H86ww"
}
'

{
  "tool": "youtube-thumbnail-downloader",
  "tool_version": "1.0.1",
  "outputs": {
    "videoId": "erLk59H86ww",
    "thumbnails": [
      {
        "quality": "Max resolution (maxresdefault)",
        "resolution": "1280×720",
        "image-url": "https://img.youtube.com/vi/erLk59H86ww/maxresdefault.jpg"
      },
      {
        "quality": "Standard definition (sddefault)",
        "resolution": "640×480",
        "image-url": "https://img.youtube.com/vi/erLk59H86ww/sddefault.jpg"
      },
      {
        "quality": "High quality (hqdefault)",
        "resolution": "480×360",
        "image-url": "https://img.youtube.com/vi/erLk59H86ww/hqdefault.jpg"
      },
      {
        "quality": "Medium quality (mqdefault)",
        "resolution": "320×180",
        "image-url": "https://img.youtube.com/vi/erLk59H86ww/mqdefault.jpg"
      },
      {
        "quality": "Small thumbnail (default)",
        "resolution": "120×90",
        "image-url": "https://img.youtube.com/vi/erLk59H86ww/default.jpg"
      }
    ]
  },
  "credits_used": 3,
  "credits_remaining": null
}