JUMP TOCards ConnectKey ManagementGet the current public key to verify message signatures.getAuthorizationCreate an authorization request.putGet an authorization record for a transaction.getCaptureCreate a capture request.putGet a capture request.getGet all capture records for a transaction.getRefundCreate a refund request.putGet a refund request.getGet all refund records for a transaction.getTransactionReturn a transaction.getVoidCreate a void request.putGet a void request.getGet all void records for a transaction.getIn-Store TransactionsIn-store Transactions OverviewTransactionNew transactionpostCancel transactionpostKey ManagementGet API keysgetCreate API keypostDelete API keydeleteSecurityHTTP HMACOverview of HeadersGenerating the Client Request Header and SignatureProcessing Response Header and SignaturePin Block EncryptionAES 256-bit BDK (Base Derivation Key)Exporting ZMK and BDK to PartnerAES DUKPT KSNAES 256-bit Initial Key (IKEY)AES 256-bit DUKPT Session Key for Counter 1AES 128-bit PIN Block or ISO Format 4A Sample of AS2805 0100 Purchase RequestConverting 3DES DUKPT KSN to AES DUKPT KSNCreate an authorization request.put https://example.com/api/v1/transactions/{transactionId}/authorizationThis endpoint is used to create a new authorization request.