Simplify user identity verification with SMS short codes
The effective cross-channel two-factor authentication technology of the Vonage Verify API helps you to protect your users and business against fraud and spam. Build trust and increase conversion across channels by sending a short code (PIN) to your user's telephone, verifying user identity. No telecom or security experience is required with this all-in-one, economical user verification API.
Nexmo is now called Vonage, but there are still references to Nexmo in our URLs, code snippets and message templates.
This API helps you to...
Provide convenience via SMS
Ensure convenient access to your apps by replacing static passwords with safe, time-limited, single-use, SMS short codes.
Verify user identity with SMS short codes
Easily add a layer of protection by two-factor authenticating new and existing customers with SMS PIN codes.
Protect from fraud and spam
Detect possible fraud and spam using up-to-date telephone number intelligence and trigger extra authentication when needed.
How it works
Vonage's Verify API verifies the identity of your user. When a user logs into his account on your app, Verify sends a one-time verification code to the phone number associated with the username and password, via an SMS, voice message or push notification. The user enters the verification code into the input box presented by your app. This confirms that the person attempting to access the account has the phone linked to that account. Your app then gives full access to the user.
You only pay for successful verifications.
What our customers say
Automatically resends codes to customers with a single API request. No additional code needed.
Ensures optimum delivery by proactively re-routing messages around congestion.
Pay per verification
Pay only for successful verifications, regardless of where users are based.