Input Schema

{
    "type": "object",
    "required": [
        "checkout_id"
    ],
    "properties": {
        "checkout_id": {
            "type": "string",
            "description": "Checkout session ID to complete"
        },
        "payment_data": {
            "type": "object",
            "required": [
                "handler_id",
                "credential"
            ],
            "properties": {
                "brand": {
                    "type": "string",
                    "description": "Payment method brand (visa, mastercard, amex, etc.)"
                },
                "credential": {
                    "type": "string",
                    "description": "Tokenized payment credential (payment method ID or token)"
                },
                "handler_id": {
                    "type": "string",
                    "description": "Payment handler identifier (e.g., stripe, paypal)"
                },
                "last_digits": {
                    "type": "string",
                    "pattern": "^[0-9]{4}$",
                    "description": "Last 4 digits of payment method for display"
                }
            },
            "description": "Payment credentials object with handler_id, credential, last_digits, and brand fields"
        }
    }
}