Internet Storm Center provides a free analysis and warning service to internet users and organizations. Internet Storm Center gathers intrusion detection logs from users and affiliated organizations to track and prevent the spread of malware. The Internet Storm Center DShield API allows users to remotely interact with the Storm Center service. Users can return backscatter data, return handler of the day, return current infocon levels, check IP address info, and many other calls. The API uses REST calls and can return data in XML,JSON,TXT and PHP.