curl --request POST \
  --url https://api.example.com/chat/ \
  --header 'Content-Type: application/json' \
  --header 'x-user-id: <x-user-id>' \
  --data '
{
  "agent_id": "<string>",
  "session_id": "<string>",
  "input": {
    "name": "<string>",
    "content": [
      {
        "text": "<string>",
        "type": "text",
        "id": "<string>"
      }
    ],
    "id": "<string>",
    "metadata": {},
    "created_at": "<string>",
    "finished_at": "<string>",
    "usage": {
      "input_tokens": 123,
      "output_tokens": 123
    }
  }
}
'

{
  "detail": [
    {
      "loc": [
        "<string>"
      ],
      "msg": "<string>",
      "type": "<string>",
      "input": "<unknown>",
      "ctx": {}
    }
  ]
}