curl --request POST \
  --url https://api.example.com/sessions/{session_id}/ask \
  --header 'Content-Type: application/json' \
  --data '
{
  "question": "<string>"
}
'

{
  "session_id": "<string>",
  "answer": "<string>",
  "citations": [
    {
      "source_url": "<string>",
      "chunk_index": 123,
      "similarity": 0.5,
      "provenance": {
        "provider_name": "tavily",
        "provider_kind": "free",
        "payment": {
          "intent_id": "<string>",
          "tx_signature": "<string>",
          "facilitator_id": "<string>",
          "network": "<string>",
          "error": "<string>"
        }
      },
      "creator_handle": "<string>",
      "creator_payout_usd": 123,
      "creator_wallet": "<string>"
    }
  ]
}