curl --request POST \
  --url https://api.iotools.cloud/v1/tool/crc-checksum-calculator \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --data '
{
  "inputText": "123456789",
  "algorithm": "crc32"
}
'

{
  "tool": "crc-checksum-calculator",
  "tool_version": "1.0.1",
  "outputs": {
    "checksum": "0xCBF43926"
  },
  "credits_used": 3,
  "credits_remaining": null
}