MaxMind's minFraud is a transaction risk API that has been in production for over two decades. It scores inbound orders against IP geolocation and proxy/VPN intelligence, device data, email reputation, card BIN metadata, and shipping address risk, returning a composite fraud score and per-factor breakdown. The Score tier is low-cost and pay-per-query, making it accessible to smaller operations that cannot justify an enterprise fraud platform contract. The Factors tier adds per-dimension scoring for merchants that want to build their own decision logic on top.

minFraud does not cover chargeback alerts or representment - it is purely a pre-authorization scoring tool. For adult operators who need a lightweight, affordable fraud filter and handle their own dispute workflows manually, it fills that gap economically.