The Open Fraud Detection Project (OFDEP) is a fraud-detection API that is designed to detect suspicious users early on, preventing activities like fraudulent purchases, invalid account creations, and comment spam. Security devices can query OFDEP to determine the odds that a given user or transaction is bad. The API is currently in beta and supports IP, email address, and username look-ups. It returns results in XML, but JSON will also be supported in the near future.
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