curl --request POST \
  --url http://localhost:5300/api/v1/knowledge/bases/{kb_uuid}/retrieve \
  --header 'Content-Type: application/json' \
  --header 'X-API-Key: <api-key>' \
  --data '
{
  "query": "<string>",
  "retrieval_settings": {
    "top_k": 123
  }
}
'

{
  "code": 0,
  "data": {
    "results": [
      {}
    ]
  }
}