curl --request POST \
  --url https://api.trycomp.ai/v1/questionnaire/answer-single \
  --header 'Content-Type: application/json' \
  --header 'X-API-Key: <api-key>' \
  --data '{}'

{
  "success": true,
  "data": {
    "questionIndex": 123,
    "question": "<string>",
    "answer": "<string>",
    "sources": [
      {}
    ],
    "error": "<string>"
  }
}