Use cases
OTP use cases for authentication, transactions and access
A one-time passcode is a possession signal. It shows that whoever is completing the step currently controls a phone number, WhatsApp account or mailbox already on file — nothing more.
What makes that signal useful is the policy around it: when a challenge is raised, which channel carries it, how long a code lives, how many attempts are allowed, and what your application does with the result. Those decisions stay yours. The pages below describe how each flow tends to break and what to measure.
For the service itself, see the OTP API overview; for evaluation criteria, see how to choose an OTP provider.
Six flows, one delivery layer
Login authentication
Secure logins with two-factor and multi-factor authentication.
Explore use caseTransaction verification
Confirm wire transfers and high-value actions in real time.
Explore use caseUser onboarding
Confirm access to a phone number, WhatsApp account or email during registration.
Explore use caseAccount recovery
Enable secure password resets with single-use passcodes.
Explore use caseE-commerce
Confirm high-value orders and protect stored payment details.
Explore use caseEnterprise access
Secure access for remote teams via internal SMPP binds.
Explore use case
The operating layer these flows share
The flows differ in what they protect and where they fail. The mechanics underneath them do not.
One integration
Authentication traffic arrives over the documented REST API or an SMPP v3.4 bind. The same integration serves every use case on this page, so a new flow is a new call rather than a new platform.
Configured channel and route policy
WhatsApp, SMS and email availability depends on the setup configured for your account. Routes can be Flow2FA-supplied, your existing vendors and binds, or a mix, with fallback rules defined per channel and market.
Attempt tracking
Codes are time-limited and single-use. Attempts, resends and delivery status are recorded against the otpId your application stores on its own record, so send activity and application outcomes can be reconciled.
Completed-verification measurement
Accepted API calls and delivery receipts are progress indicators. The outcome worth measuring is the share of challenges that end in a verified code and a recorded result in your application.
Tell us which flow is losing users
Share the flow, the markets and the channels you use today. We will map REST and SMPP options against the stack you already run.