FullContact 2.0 is a Java SDK for the FullContact Developer API. The FullContact Developer API is used to manage and enhance contact information. All successful responses are returned in JSON, XML, HTML or vCard, depending on the response format. There are different paid endpoints, such as the Person, Card Reader , and Disposable Email endpoints.
Google Contacts API gives client applications access to a user’s contacts list where the application can create new contacts, update or delete existing ones, or query for contacts that match particular criteria. This tutorial explains how to implement the API in C# and ASP.NET with OAuth 2.0.
FullContact's CEO, Bart Lorang, has just posted the company's 5 Laws of Privacy. Small wonder--they are in the business of upgrading your contacts by providing an address book in the cloud that fills in contact details. Any user would have a simple question: what happens to data I give to the company?