{
  "api_key": "<your_api_key>",
  "transaction_request": {
    "id": "checkout_demo_20260326_0001",
    "amount": "25.00",
    "currency": "TTD",
    "customer_reference": "cust_demo_0001",
    "description": "PayWise checkout example",
    "urls": {
      "success": "https://merchant.example.com/payments/success",
      "notify": "https://merchant.example.com/payments/notify",
      "error": "https://merchant.example.com/payments/error",
      "callback": "https://merchant.example.com/payments/callback"
    }
  },
  "payers": [
    {
      "mobile_number": "+1XXXXXXXXXX",
      "first_name": "<payer_first_name>",
      "last_name": "<payer_last_name>",
      "email": "payer@example.invalid",
      "payment_channel": "direct_pos",
      "payment_method": "wallet",
      "amount": "25.00"
    }
  ]
}