<< Back to Modular HomeSequence diagrams - guest card paymentBasic card authorizationAPI onlyUsing Checkout SDKCard payment using Card Payments API only.Using:Card Payments APIBrowserMerchant_FrontendMerchant_BackendCard_Payments_APIClick PayPaycustomerInitiatedTransactions requestcustomerInitiatedTransactions responseSettlement requestSettlement responseBrowserMerchant_FrontendMerchant_BackendCard_Payments_APIBasic card authorization with 3DSCard payment with 3DS authentication enabled.API onlyUsing Checkout SDK (web)Using Checkout SDK (iOS/Android)Using:3DS APICard Payments APIBrowserMerchant_FrontendMerchant_Backend3DS_APICard_Payments_APIIssuersUpdate or close challenge window on websiteApply authentication details in payment E.g. eci, authenticationValue etcClick PayPaydeviceDataInitialization requestdeviceDataInitialization responseDeviceData - BIN/JWT/URL3DS Device Data formForm POSTPostMessage: dfReferenceIdAuthentication requestAuthentication responseChallenge JWT/URL3DS challenge formForm POST`returnUrl` specified in authentication requestVerification requestVerification responsecustomerInitiatedTransactions requestcustomerInitiatedTransactions responseSettlement requestSettlement responseBrowserMerchant_FrontendMerchant_Backend3DS_APICard_Payments_APIIssuersBasic card authorization with 3DS and FraudSightCard payment with a FraudSight risk assessment and 3DS authentication enabled.API onlyUsing Checkout SDK (web)Using:FraudSight API3DS APICard Payments APIBrowserMerchant_FrontendMerchant_Backend3DS_APICard_Payments_APIFraudSight_APIIssuersUpdate or close challenge window on websiteApply authentication details in payment E.g. eci, authenticationValue etcClick PayPayAssessment requestAssessment responsedeviceDataInitialization requestdeviceDataInitialization responseDeviceData - BIN/JWT/URL3DS Device Data formForm POSTPostMessage: dfReferenceIdAuthentication requestAuthentication responseChallenge JWT/URL3DS challenge formForm POST`returnUrl` specified in authentication requestVerification requestVerification responsecustomerInitiatedTransactions requestcustomerInitiatedTransactions responseSettlement requestSettlement responseBrowserMerchant_FrontendMerchant_Backend3DS_APICard_Payments_APIFraudSight_APIIssuers