Use SendX with JavaScript

npm install sendx-javascript-sdk --save

import sendx from 'sendx-javascript-sdk';
let defaultClient = sendx.ApiClient.instance;
// Configure API key authorization: apiKeyAuth
let apiKeyAuth = defaultClient.authentications['apiKeyAuth'];
apiKeyAuth.apiKey = 'YOUR API KEY';


let apiInstance = new sendx.ContactApi(); // ContactApi |
let contactRequest = new sendx.ContactRequest(); // ContactRequest |

contactRequest.email = "jane@doe.com";
contactRequest.firstName = "Jane";
contactRequest.lastName = "Doe"; 
contactRequest.company = "Tech Solutions Inc.";
contactRequest.lastTrackedIp = "34.94.159.140";
contactRequest.customFields = { "1231nfenife213": "VIP", "1434bife23bfij32": "Special Offer Subscriber" };
contactRequest.lists = ["234b324bjed32", "234bij3e2eyv3v2i"];
contactRequest.tags = ["234bijn2ei2jbu4", "2342bijhb2ijneni"]; 

apiInstance.createContact(contactRequest).then((data) => {
    console.log('API called successfully. Contact created: ' + JSON.stringify(data, null, 2));
}, (error) => {
    console.error(error);
});