AWS End User Messaging Protect

Activate SMS Protect with one click in the console or a single API request to protect all messages you send to a given country. Message validation happens automatically in your messaging flow with no code changes required. SMS Protect prevents fraudulent message requests, reducing fraud, cutting costs, and improving delivery rates by blocking invalid numbers, disconnected lines, and high-risk destinations before you waste resources.

Protect your business from SMS pumping, fake accounts, and fraudulent verification attempts with fraud detection. SMS Protect analyzes every message request to every phone number and either recommends blocking or allows the message through. You can enable automatic blocking to stop suspicious numbers before they cost you money—or review recommendations and make the final decision yourself.

SMS Protect runs automatically on every Notify OTP message—no additional configuration required. Every verification code delivery includes built-in fraud protection, ensuring you only send to legitimate phone numbers. Fraudulent verification attempts are blocked before they cost you money, making Notify the safest way to implement two-factor authentication.

Get detailed phone number intelligence with the Carrier Lookup API—the same technology SMS Protect uses under the hood, but available as a standalone tool. Identify mobile vs landline vs VoIP, determine the carrier, and assess reachability across different message types. Use this intelligence to route messages based on line type, validate phone numbers before storing them in your database, or build custom fraud detection logic tailored to your business needs.