Pay-in collection

Thailand region pay-in API (THB). See Payment methods.

Request

POST/v2.0/transaction/pay-in

Request Path:

sandbox: https://sandbox-gateway.smilepayz.com/v2.0/transaction/pay-in
production: https://gateway.smilepayz.com/v2.0/transaction/pay-in

Header Parameters

Field	Required	Type	Description
Content-Type	M	String	application/json request body.
X-TIMESTAMP	M	String	Format: yyyy-MM-ddTHH:mm:ss±HH:mm
X-SIGNATURE	M	String	Signature of JSON body (see product Signature doc).
X-PARTNER-ID	M	String	Your merchantID

Body Parameters

Field	Required	Type	Description
orderNo	M	String(32)	Merchant-unique id
purpose	M	String(64)	Memo to payer
merchant	M	Object	Wraps merchantId and optional sub-merchant fields.
merchantId	M	String	Smilepayz merchantId for this call.
merchantName	O	String	Merchant display name.
subMerchantId	O	String	Sub-merchant ID.
subMerchantName	O	String	Name for subMerchantId.
money	M	Object	Currency plus amount for this transaction.
currency	M	String	Fixed to THB.
amount	M	Number	Amount (up to 2 decimal places). See Money
payer	M	Object	Payer object per region rules (see Payer model).
name	M	String	Beneficiary full name (UTF-8).
bankName	M	String	Bank code (e.g. KBANK, BBL, SCB); see Payment methods doc.
accountNo	M	String	Settlement accountNo if gateway returns it.
paymentMethod	M	String	See Payment methods doc.
expiryPeriod	O	Number	ExpiryPeriod, default 3600.
redirectUrl	O	String(256)	HTTPS post-pay return URL, max 256 chars.
callbackUrl	O	String(256)	HTTPS async status URL, max 256 chars.

---

Example Body – Transaction Request:

Content-type: application/json
X-TIMESTAMP: 2020-12-17T10:55:00+07:00
X-SIGNATURE: 7MHd9v5/m9JeqmDZVwWBZUZ5J5...7120QnFEny7Qm7uQR1G0TWCh10fsU6nVxiRoeoQ==
X-PARTNER-ID: 20001

{
    "orderNo": "20011b5baff0ed8ac4f0c873920e",
    "purpose": "Bill payment — Bangkok",
    "merchant": {
        "merchantId": "20011"
    },
    "money": {
        "currency": "THB",
        "amount": 50000
    },
    "payer": {
        "name": "Somchai Saetan",
        "bankName": "KBANK",
        "accountNo": "1234567890"
    },
    "paymentMethod": "BANK",
    "redirectUrl": "https://docs.smilepayz.com/en/"
}

Responses

HTTP Request

Field	Required	Type	Description
Content-Type	M	String	application/json request body.
X-TIMESTAMP	M	String	Format: yyyy-MM-ddTHH:mm:ss±HH:mm

Body Parameters

Field	Required	Type	Description
code	M	String	00 success, other values error.
message	M	String	UTF-8 human-readable result line.
orderNo	M	String	Merchant-unique id
tradeNo	O	String	Smilepayz tradeNo for this order.
merchant	M	Object	Wraps merchantId and optional sub-merchant fields.
merchantId	M	String	Smilepayz merchantId for this call.
merchantName	O	String	Merchant display name.
subMerchantId	O	String	Sub-merchant ID.
subMerchantName	O	String	Name for subMerchantId.
money	M	Object	Currency plus amount for this transaction.
currency	M	String	Fixed to THB.
amount	M	Number	Amount (up to 2 decimal places). See Money
payAmount	O	Number	Settled amount after fees (decimal THB).
transactionTime	M	String	yyyy-MM-ddTHH:mm:ss±HH:mm
channel	M	Object	Channel payload (paymentUrl, qrString, …).
paymentMethod	O	String	See Payment methods doc.
paymentUrl	M	String	Cashier URL to open for the payer.
qrString	O	String	PIX or channel copy-paste string if returned.
receiverBankName	O	String	Bank code when channel is bank transfer.
vaNumber	O	String	VA / reference when returned.
uploadReceipt	O	Integer	1 if this order requires payer to upload a payment slip; 0 otherwise. When 1, call the Upload Receipt API after the payer completes the bank transfer.
status	O	String	Order or payment status enum value.

Content-type: application/json
X-TIMESTAMP: 2020-12-17T10:55:00+07:00

{
    "code": "00",
    "message": "Successful",
    "orderNo": "878d95fe75ef4c49b11d266afa8dd849",
    "tradeNo": "111200012411191251468673",
    "merchant": {
        "merchantId": "20001",
        "merchantName": "Smilepayz Demo Store",
        "accountNo": "11120001202406101410"
    },
    "money": {
        "currency": "THB",
        "amount": 300,
        "payAmount": 299.98
    },
    "transactionTime": "2024-11-19T12:51:47+07:00",
    "channel": {
        "paymentMethod": "QRPAY",
        "paymentUrl": "https://gateway.smilepayz.com/cashier/#/loading?tradeNo=111200012411191251468673",
        "qrString": "00020101021229370016A0000006770101110113006680870163353037645406299.985802TH63048436"
    },
    "status": "PROCESSING"
}

{
    "code": "00",
    "message": "Successful",
    "orderNo": "20011b5baff0ed8ac4f0c873920e",
    "tradeNo": "1112001125042408363186433",
    "merchant": {
        "merchantId": "20011",
        "merchantName": "Smilepayz Demo Store",
        "accountNo": "11120011202402290943"
    },
    "money": {
        "currency": "THB",
        "amount": 50000,
        "payAmount": 49999.99
    },
    "transactionTime": "2025-04-24T08:36:32+07:00",
    "channel": {
        "paymentMethod": "BANK",
        "paymentUrl": "https://gateway.smilepayz.com/cashier/#/loading?tradeNo=1112001125042408363186433",
        "receiverBankName": "KBANK",
        "vaNumber": "2053617290",
        "uploadReceipt": 1
    },
    "status": "PROCESSING"
}

Notification/Callback

Callback signature ≠ request signature

Do not verify callback X-SIGNATURE with the request-signing formula. See Callback Signature.

HTTP Request

Field	Required	Type	Description
Content-Type	M	String	application/json request body.
X-TIMESTAMP	M	String	Format: yyyy-MM-ddTHH:mm:ss±HH:mm
X-SIGNATURE	M	String	See Callback Signature

Body Parameters

Field	Required	Type	Description
orderNo	M	String	Merchant-unique id
tradeNo	M	String	Smilepayz tradeNo for this order.
merchantId	M	String	Smilepayz merchantId for this call.
merchantName	M	String	Merchant display name.
subMerchantId	O	String	Sub-merchant ID.
subMerchantName	O	String	Name for subMerchantId.
paymentMethod	M	String	See Payment methods doc.
transactionTime	M	String	Format: yyyy-MM-ddTHH:mm:ss
status	M	String	Order or payment status enum value.
money	M	Object	Currency plus amount for this transaction.
currency	M	String	Fixed to THB.
amount	M	Number	Amount (up to 2 decimal places). See Money
payAmount	O	Number	Net amount when returned.
payer	O	Object	Payer object per region rules (see Payer model).

Return

Important

Respond with the string SUCCESS only.

{
    "orderNo": "20011b5baff0ed8ac4f0c873920e",
    "tradeNo": "1112001125042408363186433",
    "merchantId": "20011",
    "merchantName": "Smilepayz Demo Store",
    "subMerchantId": "",
    "subMerchantName": "",
    "paymentMethod": "BANK",
    "transactionTime": "2025-04-24T08:36:32+07:00",
    "status": "SUCCESS",
    "money": {
        "currency": "THB",
        "amount": 50000
    },
    "payer": {
        "name": "Somchai Saetan",
        "accountNo": "*****67890"
    }
}

SUCCESS