{
  "$schema": "https://json-schema.org/draft/2020-12/schema",
  "$id": "#/components/schemas/SendTransactionalSms",
  "title": "SendTransactionalSms",
  "type": "object",
  "required": [
    "sender",
    "recipient",
    "content"
  ],
  "properties": {
    "sender": {
      "type": "string",
      "description": "Name or number displayed as the SMS sender. Must be between 3 and 11 characters for alphanumeric senders.",
      "minLength": 3,
      "maxLength": 11
    },
    "recipient": {
      "type": "string",
      "description": "Recipient phone number in international format with country code prefix."
    },
    "content": {
      "type": "string",
      "description": "Text content of the SMS message.",
      "maxLength": 160
    },
    "type": {
      "type": "string",
      "description": "Type of SMS message to send.",
      "enum": [
        "transactional",
        "marketing"
      ],
      "default": "transactional"
    },
    "tag": {
      "type": "string",
      "description": "Tag for categorizing the SMS for reporting purposes."
    },
    "webUrl": {
      "type": "string",
      "format": "uri",
      "description": "Webhook URL to receive delivery status notifications."
    }
  }
}