You need to take the entire paymentToken received from onpaymentauthorized, get the paymentData, then base64 encode response will look like this `Payment Token: { "paymentData": { "version": "EC_v1", "data": "UwXPzQeEmi+IgZp9Tz6lEhLNmXmZrQ2FqdNYs671/sE/3rqOpcKrZOGPHu9JMGIHZZOFkbVPAQ919wmLfWLXKIvqxbpAzJoc1F9NjtZmWpiqJELCzPTbdi+OmQrggnBAw8fd7FwVY19bNDoqtN5g4lSeV2Gs1nTzRjvWb7W17+J5dlq/cOK0RCD/O8mjwYQ5axrZc6WrWXoAhdwsNf9dLqdTeCPEW2rkccikmr2670DFYhSMyF+JrG4aHmDBY7v8EHgvkdd2fjPB92Qh4j4UEa0i6/oOZ4VC7u3svNYEwGEBXbjMkpQr4UPfkuxGaxTvAJBg3ra+x6WGIEAwzHKkoenIf9NkBbFJmHdJ5ZD1GbzL7b8cBilnL/si3/sSmGMgI7m68noFIKetDZwlN9P2+5RnofcECN5FM/aR5vpzrA==", "signature": "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", "header": { "ephemeralPublicKey": "MFkwEwYHKoZIzj0CAQYIKoZIzj0DAQcDQgAEL7u/GO5+iFC5hK0516IgX6DKmPB0xTi3oQ1nWCdTc5DXQuAP4XMep40jGRb7UCoaEXgPx5vvRuxshadS7PP4+w==", "publicKeyHash": "ilecVF58bpB8qio67Y0Okg5Hl6eirw2Y1v1KUCsdVgQ=", "transactionId": "92fc14bc748dd361f563d0a0a24fddb5d96715ef9a491b546274ed5e05463c2b" } }, "paymentMethod": { "displayName": "Visa 0492", "network": "Visa", "type": "debit" }, "transactionIdentifier": "92FC14BC748DD361F563D0A0A24FDDB5D96715EF9A491B546274ED5E05463C2B" } JS send to backend as applepay_data '&applepay_data=' + encodeURIComponent(JSON.stringify(token.paymentData)); Java example to base64 encode String applePayToken = reqParms.getString("applepay_data",null); byte[] encodedBytes = Base64.encodeBase64(applePayToken.getBytes(StandardCharsets.UTF_8)); applePayToken = new String(encodedBytes,StandardCharsets.UTF_8); That is what you need to send to Cybersource, if you are just sending part of token.paymentData it won't work