Security and fraud
How do you stop SMS pumping on an OTP endpoint?
Layer rate limits, CAPTCHA, country filtering and spend caps. No single control stops SMS pumping, but together they make it unprofitable.
Security and fraudWhat is SMS pumping (AIT) and how does it hit OTP endpoints?
SMS pumping is fraud where bots trigger paid OTP messages to inflated-traffic numbers. Here is how it works and what the bill looks like.