curl --request POST \
  --url https://api.iotools.cloud/v1/tool/roman-numeral-converter \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --data '
{
  "mode": "to-roman",
  "number": "1234"
}
'

{
  "tool": "roman-numeral-converter",
  "tool_version": "1.0.1",
  "outputs": {
    "result": "MCCXXXIV",
    "breakdown": "M (1000) + CC (200) + XXX (30) + IV (4) = 1234"
  },
  "credits_used": 3,
  "credits_remaining": null
}