curl --request GET \
  --url https://agenticadvertising.org/api/properties/validate

{
  "valid": true,
  "domain": "<string>",
  "url": "<string>",
  "errors": [
    "<string>"
  ],
  "warnings": [
    "<string>"
  ],
  "status_code": 123,
  "raw_data": {}
}