We use org.json api to parse json on server side and GWT JsonParser to parse JSON on client side. Is there a api that we can use that can be used on both the client side and server side?
You are looking for GWT AutoBean: http://code.google.com/p/google-web-toolkit/wiki/AutoBean
With AutoBeans you juset define the structure of your JSON and the GWT Compiler handles the rest.