curl --request POST \
  --url https://api.anysite.io/api/kleinanzeigen/sellers/listings \
  --header 'Content-Type: application/json' \
  --header 'access-token: <api-key>' \
  --data '
{
  "seller": "<string>",
  "count": 2,
  "timeout": 300
}
'

[
  {
    "id": "<string>",
    "url": "<string>",
    "@type": "@kleinanzeigen_ad_card",
    "title": "<string>",
    "price": 123,
    "currency": "EUR",
    "is_negotiable": false,
    "is_free": false,
    "description": "<string>",
    "postal_code": "<string>",
    "state": "<string>",
    "city": "<string>",
    "posted_at": "<string>",
    "shipping_available": false,
    "image": "<string>",
    "image_count": 123
  }
]