curl --request POST \
  --url https://api.iotools.cloud/v1/tool/totp-hotp-generator \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --data '
{
  "otpType": "totp",
  "issuer": "iotools",
  "accountName": "user@example.com",
  "secret": "JBSWY3DPEHPK3PXP",
  "algorithm": "sha1",
  "digits": "6",
  "period": "30",
  "timestamp": "59",
  "counter": "0"
}
'

{
  "tool": "totp-hotp-generator",
  "tool_version": "1.0.1",
  "outputs": {
    "otpUri": "otpauth://totp/iotools:user%40example.com?secret=JBSWY3DPEHPK3PXP&issuer=iotools&algorithm=SHA1&digits=6&period=30",
    "currentCode": "996554",
    "counterUsed": "1",
    "secondsRemaining": "1"
  },
  "credits_used": 3,
  "credits_remaining": null
}