Register Transaction

By registering order information to open the payment screen, you can receive the Payment Window URL in the response.

Request

Request URL

POST https://{API Domain}/api/ep9/trades/webpay
Content-type: application/json; charset=utf-8

Parameters

Field Name	Type	Length	Required	Description
mallId	String	8Byte	✅	Merchant ID assigned by KICC
shopOrderNo	String	40Byte	✅	Merchant Order No. Must be Unique.
amount	Number		✅	Payment Amount
payMethodTypeCode	String	2Byte	✅	Payment Method Code (See Payment Method Codes). Request "00" if not selecting a specific method.
currency	String	2Byte	✅	Currency Code (KRW: “00”)
returnUrl	String	256Byte	✅	URL to redirect to after authentication completes.
deviceTypeCode	String	20Byte	✅	Device Type PC: “pc”, Mobile: “mobile”
clientTypeCode	String	2Byte	✅	Window Type Code (Fixed at "00" for Integrated)
langFlag	String	3Byte		KOR: Korean, ENG: English, JPN: Japanese, CHN: Chinese
appScheme	String	256Byte		Merchant App Scheme (Required for iOS App-to-App return) See WebView Guide
orderInfo	Object		✅	Order Info See orderInfo below
payMethodInfo	Object			Payment Method Management Info See payMethodInfo below
taxInfo	Object			Complex Tax Info (Required if using Complex Tax) See taxInfo below
shopValueInfo	Object			Merchant Custom Fields (Returned in Approval/Notify response) See shopValueInfo below
depositInfoList	Array			Resource Circulation Deposit List See depositInfoList below
escrowInfo	Object			Escrow Info (Required if using Escrow) See escrowInfo below
basketInfoList	Array			Basket List (Required if using Split Settlement) See basketInfoList below

orderInfo (Order Information)

Field Name	Type	Length	Required	Description
goodsName	String	50Byte	✅	Product Name
customerInfo	Object			Customer Info See customerInfo below

orderInfo > customerInfo (Customer Information)

Field Name	Type	Length	Required	Description
customerId	String	20Byte		Customer ID
customerName	String	20Byte		Customer Name
customerMail	String	50Byte		Customer Email
customerContactNo	String	11Byte		Contact Number (Numbers only)
customerAddr	String	200Byte		Customer Address

payMethodInfo (Payment Method Management Info)

Field Name	Type	Length	Required	Description
cardMethodInfo	Object			Credit Card Config Info (Required only if customizing Card or Simple Pay display) See cardMethodInfo below
virtualAccountMethodInfo	Object			Virtual Account Config Info (Required only if customizing Bank display) See virtualAccountMethodInfo below

payMethodInfo > cardMethodInfo (Credit Card Config)

Field Name	Type	Length	Required	Description
paymentType	String	1Byte		Credit Card Payment Type Empty: General "0": Key-in Auth "1": Key-in Non-auth
installmentMonthList	Array			List of installment months to display Lump-sum only: [0] Up to 6 months: [0, 2, 3, 4, 5, 6]
setFreeInstallment	String	1Byte		Use Interest-free: Y/N (Follows ledger settings if empty)
setCardPoint	String	1Byte		Use Card Points: Y/N (Follows ledger settings if empty)
joinCd	String	4Byte		Affiliate Service Code (Contact sales to use)
displayArea	Array			Display Area List (Follows ledger settings if empty) "CARD": Credit Card only, "SPAY": Simple Pay only
usedSpayCode	Array			List of Simple Pay providers to display (See CP Codes) Example (KakaoPay only): ["KKO"]
cardInfoList	Array			List of Credit Card companies to display See cardInfoList below

payMethodInfo > cardMethodInfo > cardInfoList (Credit Card List)

Field Name	Type	Length	Required	Description
cardCd	String	3Byte	✅	Card Company Code to display (See Window Card Codes)
cardPoint	String	2Byte		Card Point Value. Use "60" if setCardPoint is "Y".
freeInstallmentMonthList	Array			Interest-free Month List. Applied if setFreeInstallment is "Y". Example (2~6 months): [2,3,4,5,6]

payMethodInfo > virtualAccountMethodInfo (Virtual Account Config)

Field Name	Type	Length	Required	Description
bankList	Array			List of Banks to display (See Bank Codes)
expiryDate	String	8Byte		Expiration Date (yyyyMMdd)
expiryTime	String	6Byte		Expiration Time (hhmmss)

taxInfo (Complex Tax Info)

Field Name	Type	Length	Required	Description
taxAmount	Number		✅	Taxable Amount
freeAmount	Number		✅	Tax-free Amount
vatAmount	Number		✅	VAT Amount

shopValueInfo (Merchant Custom Fields)

Field Name	Type	Length	Required	Description
value1	String	64Byte		Field 1
value2	String	64Byte		Field 2
value3	String	32Byte		Field 3
value4	String	32Byte		Field 4
value5	String	64Byte		Field 5
value6	String	64Byte		Field 6
value7	String	64Byte		Field 7

depositInfoList (Resource Circulation Deposit List)

Field Name	Type	Length	Required	Description
dpsType	String	1Byte	✅	Deposit Type (Cup Deposit: “C”)
dpsAmount	Number		✅	Deposit Amount (Total amount per type)

Request Example

{  
    "mallId": "{Merchant ID}", 
    "shopOrderNo": "{Merchant Order No}", 
    "amount": 1000, 
    "payMethodTypeCode": "00", 
    "currency": "00",
    "clientTypeCode": "00", 
    "returnUrl": "{Merchant Return URL}", 
    "deviceTypeCode": "mobile",     
    "orderInfo": { 
        "goodsName": "Sample Product Name" 
    }
}

Escrow

To use the Escrow Service, please add the following information to your request.

escrowInfo (Escrow Information)

Field Name	Type	Length	Required	Description
escrowTypeCode	String	1Byte	✅	Escrow Type. Fixed at "K".
deliveryCode	String	4Byte	✅	Delivery Type ("DE01": Self, "DE02": Courier)
goodsInfoList	Array		✅	Basket List (Max 20 items)
recvInfo	Object		✅	Recipient Info

escrowInfo > goodsInfoList (Basket List)

Field Name	Type	Length	Required	Description
productNo	String	40Byte	✅	Unique Product No. Must be unique within the basket.
productName	String	50Byte	✅	Product Name
productAmount	Number		✅	Product Amount

escrowInfo > recvInfo (Recipient Info)

Field Name	Type	Length	Required	Description
recvName	String	20Byte	✅	Recipient Name
recvMobileNo	String	11Byte	✅	Recipient Contact No. (Numbers only)
recvMail	String	50Byte		Recipient Email
recvZipCode	String	6Byte		Recipient Zip Code
recvAddr1	String	100Byte		Address Line 1
recvAddr2	String	100Byte		Address Line 2

Request Example

{  
    "mallId": "{Merchant ID}", 
    "shopOrderNo": "{Merchant Order No}", 
    "amount": 1000, 
    "payMethodTypeCode": "00", 
    "currency": "00",
    "clientTypeCode": "00", 
    "returnUrl": "{Merchant Return URL}", 
    "deviceTypeCode": "mobile",     
    "orderInfo": { 
        "goodsName": "Sample Product Name" 
    },
    "escrowInfo": {
        "escrowType": "K",
        "deliveryCode": "DE01",
        "goodsInfoList": [
            {
                "productNo": "{Unique Product No}",
                "productName": "{Product Name}",
                "productAmount": 1000
            }
        ],
        "recvInfo": {
            "recvName": "Recipient Name",
            "recvMobileNo": "01012345678",
            "recvMail": "test@email.com",
            "recvAddr": "Seoul, Korea",
            "recvZipCode": "00000",
            "recvAddr1": "Address Line 1",
            "recvAddr2": "Address Line 2"
        }
    }
}

Split Settlement

To use the Split Settlement Service, please add the following information to your request.

Note

• You must obtain a dedicated Split Settlement Merchant ID to use this service.

basketInfoList (Basket List)

Field Name	Type	Length	Required	Description
productNo	String	40Byte	✅	Unique Product No. Must be unique within the basket.
productName	String	50Byte	✅	Product Name
productAmount	Number		✅	Product Amount
sellerId	String	50Byte	✅	Seller ID
feeUsed	Boolean		✅	Use Seller Fee (true/false)
feeTypeCode	String	1Byte		Fee Type Code (Required if feeUsed is true) Fixed Amount: "A", Rate: "P"
feeCharge	Number			Seller Fee Amount (Required if feeUsed is true) For Rate("P"): Fee % * 1000 (e.g., 2.12% -> 2120)

Request Example

{  
    "mallId": "{Merchant ID}", 
    "shopOrderNo": "{Merchant Order No}", 
    "amount": 1000, 
    "payMethodTypeCode": "00", 
    "currency": "00",
    "clientTypeCode": "00", 
    "returnUrl": "{Merchant Return URL}", 
    "deviceTypeCode": "mobile",     
    "orderInfo": { 
        "goodsName": "Sample Product Name" 
    },
    "basketInfoList": [
        {
            "productNo": "{Unique Product No}",
            "productName": "{Product Name}",
            "productAmount": 1000,
            "sellerId": "{Seller ID}",
            "feeUsed": true,
            "feeTypeCode": "P",
            "feeCharge": 2120
        }
    ]
}

Response

Parameters

Field Name	Type	Length	Required	Description
resCd	String	4Byte	✅	Response Code (Success: “0000”)
resMsg	String	1000Byte	✅	Response Message
authPageUrl	String	256Byte		Payment Window URL

Response Example

{
   "resCd": "0000",
   "resMsg": "Success",
   "authPageUrl": "{Payment Window URL}"
}