curl --request POST \
  --url https://api.iotools.cloud/v1/tool/universal-encoder \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --data '
{
  "inputText": "Hello, World!",
  "scheme": "base64"
}
'

{
  "tool": "universal-encoder",
  "tool_version": "1.0.2",
  "outputs": {
    "output": "SGVsbG8sIFdvcmxkIQ=="
  },
  "credits_used": 5,
  "credits_remaining": null
}