https://skmtc.net/2c2p/apis/payment/docs/nonUI/post 2026-07-26 0.5 https://skmtc.net/2c2p/apis/payment/docs/prePaymentUI/post 2026-07-26 0.5 https://skmtc.net/2c2p/apis/payment/docs/TransactionStatus/get 2026-07-26 0.5 https://skmtc.net/2c2p/apis/payment/docs/TransactionList/post 2026-07-26 0.5 https://skmtc.net/2c2p/apis/payment/docs/void/post 2026-07-26 0.5 https://skmtc.net/2c2p/apis/payment/docs/refund/post 2026-07-26 0.5 https://skmtc.net/2c2p/apis/payment/docs/settlement/put 2026-07-26 0.5