//-- Intent: add a new contact to a contact list with listcode of 123456 --// var jsonString = ' \ { \ "EntityName":"MyContact 0", \ "EntityGuid":"8454e278-4e63-4ea1-a801-2c1203faf26b", \ "Phones":[{ \ "Phone":"2012361344", \ "Extension":"", \ "AnsDetectionOverride":0, \ "OptInSMS":true, \ "PhoneType":0, \ "PhoneLabel":"Mobile" \ }], \ "Addresses":[{ \ "AddressGuid":"b414c9e2-4501-4ab8-9dd1-4fa11ba58761", \ "Label":"Office", \ "Address1":"14 Industrial Ave", \ "Address2":"", \ "City":"Mahwah", \ "State":"NJ", \ "PostalCode":"07430", \ "County":"", \ "Latitude":41.052698269486427, \ "Longitude":-74.121656566858292, \ "IsPrimary":true \ }], \ "Email":"info@swiftreach.com", \ "Fax":"", \ "SMSPhone":"", \ "SMSNetwork":0, \ "Pager":"", \ "PagerNetwork":0, \ "PinCode":"", \ "SpokenLanguage":"English", \ "Tag":"", \ "UserDefined":[] \ }'; $.ajax({ type: "POST", contentType: "application/json; charset=utf-8", headers: {"SwiftAPI-Key": "12345"}, url: "http://api.v4.swiftreach.com/api/ContactLists/Contacts/Create/123456", data: jsonString, dataType: "json" success: function(result) { // Do something with the result } }); <!-- example return value --> <string>22748f25-07b8-459c-bcef-ce2ba851a84c</string>