curl --request POST \
  --url https://api.iotools.cloud/v1/tool/scientific-notation-converter \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --data '
{
  "inputNumber": "12345",
  "sigFigs": "auto"
}
'

{
  "tool": "scientific-notation-converter",
  "tool_version": "1.0.1",
  "outputs": {
    "standard": "12,345",
    "scientific": "1.2345 × 10⁴",
    "engineering": "12.345 × 10³",
    "eNotation": "1.2345e4"
  },
  "credits_used": 3,
  "credits_remaining": null
}