curl --request GET \
  --url https://api.cal.com/v2/organizations/{orgId}/attributes/{attributeId}/options \
  --header 'Authorization: <authorization>'

{
  "status": "success",
  "data": [
    {
      "id": "attr_option_id",
      "attributeId": "attr_id",
      "value": "option_value",
      "slug": "option-slug"
    }
  ]
}