A velocity check measures how quickly and how often operations occur, considering factors such as IP address, geolocation, device fingerprint, account, and resources. It helps identify brute-force attempts, payment fraud, resource exhaustion, and suspicious data access. section 5.1.2
Login and payment scenarios
A login endpoint can count attempts by IP and account, block an IP after a threshold, and lock an account after repeated failures. For payments, repeated attempts using one card can be evaluated alongside IP, location, and device data before treating them as fraudulent. section 5.1.2
