curl --request POST \
  --url https://api.iotools.cloud/v1/tool/letter-to-number-converter \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --data '
{
  "text": "Hello World!",
  "codeType": "a1z26",
  "direction": "text_to_number",
  "separator": "space"
}
'

{
  "tool": "letter-to-number-converter",
  "tool_version": "1.0.1",
  "outputs": {
    "output": "8 5 12 12 15   23 15 18 12 4 !"
  },
  "credits_used": 3,
  "credits_remaining": null
}