curl --request POST \
  --url https://api.example.com/knowledge_bases/{knowledge_base_id}/search \
  --header 'Content-Type: application/json' \
  --header 'x-user-id: <x-user-id>' \
  --data '
{
  "query": "<string>",
  "top_k": 5
}
'

{
  "results": [
    {
      "score": 123,
      "document_id": "<string>",
      "chunk": {
        "content": {
          "text": "<string>",
          "type": "text",
          "id": "<string>"
        },
        "source": "<string>",
        "chunk_index": 123,
        "total_chunks": 123,
        "metadata": {}
      }
    }
  ],
  "total": 123
}