Protect your business and your customers
Create an additional level of security by offering temporary, one-time passwords (OTP) for number validations, two-factor authentication, and verified purchases.

Verify numbers, personalize offers, and prevent attackslink to this section
Make it harder for unauthorized parties to gain access to secure passwords or purchasing information.
Prevent attacks
OTPs are only valid for a short amount of time, preventing extra usage or vulnerabilities.
Personalize offers
Make offers to specific customers with single-use passwords only they activate.
Number verification
OTPs are great for offering two-factor authentication when signing in to new devices.
Protect transactions
Using our phone verification services, you can protect payments, deposits, and log-ins with customer-specific one-time passwords.
We streamline verification logic for you
With our phone verification services, you can send a personalized OTP message to your end-user by calling the dedicated endpoint.
The user enters the unique code within your application or website.
Verify the code submitted by the end-user through a request to the verification endpoint.
8x8 SMS APIs case studieslink to this section
See how six companies are increasing CSAT and security using 8x8 SMS APIs.
“The 8x8 API was easily integrated into our platform, and we leveraged on the automated messages to help build the credibility and trust of our brand. It is a valuable investment into the future.”
Louie Alcantara, Co-Founder of Mangan.ph
Increase security with Two-Factor Authentication (2FA)
2FA increases security for websites and applications, making it harder to hack into user accounts.

Deliver OTPs in text or voice
We understand how important it is to quickly deliver OTPs. Our OTP API offers additional features like voice delivery, which is a simple way to make sure people get their OTPs right away — with added security.

Start verifying users, accounts and transactions
One solution
Create a one-time password, send it by SMS or voice message and begin authenticating users, accounts and transactions
Fully secured
Fully secured algorithm (RFC 6238)
Highly customizable
Customize sender ID and message content
Multi-language
Support for up to 100 language and voice profiles for voice messaging
Full code-parameters control
3-10 characters, flexible content type, control OTP validity duration and minimum resending interval
Monitor messages
Track messages’ sent, delivered, and conversion rates using our customer portal dashboards
Fall back
Fall back to Voice Message to ensure high conversion rate
Conversions analytics
Monitor, track and ensure high levels of conversion and deliverability with our robust reporting dashboard
Get the Integrate SMS API
Integrate single or bulk SMS API and start sending messages from your mobile or web app.
Create a free account
See it in action! Sign up with 8x8 Connect – an all-in-one business communication platform used by knowledge-driven businesses to manage omni-channel campaigns, send text or voice messages, and get real-time reports and analytics.
Explore other embeddable communications
SMS Overview
With our fully-supported SMS gateway you can send and receive messages in a matter of minutes.
SMS Notification
Keep customers in the loop on status of deliveriesor send important appointment reminders.
10DLC
Upgrade your A2P messaging experience in the US with 10 Digit Long Code, now supported by 8x8.
SMS Engage
An add-on feature that allows you to fully integrate web surveys into your SMS workflows. Something better than a 2-way SMS.