curl --request POST \
  --url https://api.urltodata.ai/v1/image/describe \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --data '
{
  "url": "<string>"
}
'

{
  "subject": "<unknown>",
  "constraints": {
    "must_keep": [
      "<string>"
    ],
    "avoid": [
      "<string>"
    ]
  },
  "negative_prompt": "<string>"
}