curl --request GET \
  --url 'http://localhost:8000/conversations/{conversation_id}' \
  --header 'Authorization: Bearer YOUR_API_KEY'

{
  "conversation_id": "string",
  "agent_id": "string",
  "messages": [
    {}
  ],
  "created_at": "2026-07-24T12:00:00Z",
  "last_message_at": "2026-07-24T12:00:00Z",
  "total_tokens": 1,
  "metadata": {}
}