| No | Field Name | Field Description | Condition (approval) | Condition(Cancel) |
| 1 | ver | “100” | M | M |
| 2 | merchantId | Merchant ID | M | M |
| 3 | merchantPwd | Merchant password | M | M |
| 4 | ref | Merchant transaction number (order number) | M | M |
| 5 | tradeGubun | Transaction Classification | M | M |
| 6 | cardNo | Card number | M | C |
| 7 | expireM | Expiration date | M | C |
| 8 | expireY | Expiration date | M | C |
| 9 | csc | Security code | O | O |
| 10 | currType | Transaction currency | M | M |
| 11 | price | Transaction amount | M | M |
| 12 | payName | English name of card holder | M | C |
| 13 | payId | BuyerID | O | O |
| 14 | payEmail | BuyerEmail | O | O |
| 15 | payTel | BuyerPhoneNumber | O | O |
| 16 | productName | Product Name | O | O |
| 17 | transNo | Transaction number(返金時の転送) | M | M |
| 18 | returnURL | Return URL | C | C |