curl --request POST \
  --url https://app.nex.ai/api/developers/v1/objects/{slug}/attributes \
  --header 'Authorization: <api-key>' \
  --header 'Content-Type: application/json' \
  --data '
{
  "name": "Status",
  "slug": "status",
  "type": "select",
  "description": "Current status",
  "options": {
    "is_required": true,
    "select_options": [
      {
        "name": "Open"
      },
      {
        "name": "In Progress"
      },
      {
        "name": "Done"
      }
    ]
  }
}
'

{
  "description": "<string>",
  "id": "<string>",
  "name": "<string>",
  "options": {
    "is_multi_value": true,
    "is_required": true,
    "is_unique": true,
    "is_whole_number": true,
    "select_options": [
      {
        "id": "<string>",
        "name": "<string>"
      }
    ],
    "use_raw_format": true
  },
  "slug": "<string>",
  "type": "<string>"
}