curl --request POST \
  --url https://api.valyu.network/contents \
  --header 'Content-Type: application/json' \
  --header 'x-api-key: <api-key>' \
  --data '{
  "urls": [
    "https://example.com/article1",
    "https://example.com/article2"
  ],
  "response_length": "medium",
  "summary": false
}'

{
  "success": true,
  "error": null,
  "tx_id": "tx_12345678-1234-1234-1234-123456789abc",
  "results": [
    {
      "title": "AI Breakthrough in Natural Language Processing",
      "url": "https://example.com/article1?utm_source=valyu",
      "content": "# AI Breakthrough in Natural Language Processing\n\nThis article discusses...",
      "description": "Latest AI developments",
      "source": "web",
      "price": 0.002,
      "length": 12840,
      "data_type": "unstructured",
      "source_type": "news_article",
      "publication_date": "2024-01-15",
      "id": "https://example.com/article1",
      "image_url": {}
    }
  ],
  "urls_requested": 2,
  "urls_processed": 2,
  "urls_failed": 0,
  "total_cost_dollars": 0.004,
  "total_characters": 25680
}