SMS OTP
Verification Service for Safer User Access
Add an SMS OTP verification service to the wider okID workflow
and confirm access to a submitted mobile number through a
six-digit one-time code.
- E.164 number format
- Six-digit verification codes
- Verified status & API result
SMS OTP Verification Service Built on Proven Scale
Add SMS OTP verification through okID’s broader verification platform, backed by Bluem’s transaction infrastructure and operational experience.
Close Critical SMS OTP verification Gaps
Collecting a phone number does not confirm that the user can access the associated mobile device. SMS OTP verification adds that access check before approval or onboarding continues.
Number Submitted, Access Unconfirmed
A phone number can be entered without proving that the user can receive messages on the associated device. An SMS code adds a direct access check.
- Number submitted
- Access unconfirmed
- OTP missing
One Factor Leaves a Gap
A password checks something the user knows but does not confirm access to the registered mobile device. SMS OTP adds a possession factor.
- Password-only access
- No device check
- Missing second factor
High-Risk Actions Need Reverification
Customer access and transaction approvals may need a fresh verification code instead of relying only on an earlier login or identity check.
- Customer access
- Identity checks
- Transaction approvals
SMS OTP Verification in Three Steps
Confirm access to a submitted mobile number through a simple SMS OTP verification flow. The user receives a six-digit code, enters it in the verification screen, and validates it.
Step 01
Step 02
Step 03Step 01Get a Code
The user starts SMS OTP Verification and sees a message confirming that a six-digit SMS code has been sent to the submitted mobile number.
Step 02Enter the Code
The user opens the SMS message, copies the code, and enters it in the provided boxes within the verification flow.
Step 03Validate
The user clicks Validate to confirm access to the mobile number
and complete the SMS OTP verification step.
Core SMS OTP verification Service Features
Add SMS OTP verification to the wider okID workflow and confirm access to a submitted mobile number through a six-digit one-time code.
SMS OTP Verification
Send a six-digit one-time code to confirm access to the submitted phone number.
E.164 Number Format
Collect mobile numbers in a standardized international format for consistent processing.
Rate-Limited Requests
Apply module-level rate limiting to repeated SMS OTP Verification requests.
Hosted Verification Flow
Guide users through SMS OTP Verification in the mobile-responsive okID portal.
Modular Verification Setup
Enable SMS OTP Verification alongside the other modules required by your workflow.
API and Webhook Results
Retrieve verification data through the API or receive completed results through a webhook.
Build the Verification
Flow You Need
Bring the right checks together in one flexible flow, tailored to how
your business verifies customers.
Stops invalid, disposable, and unreachable email addresses before they enter registration, onboarding, or identity verification workflows.
Collects business-specific information through configurable forms that work alongside the required Document Verification step.
Captures and evaluates passports, ID cards, driving licences, and residence permits through layered document checks.
Control Your SMS OTP Verification workflow
Configure where SMS OTP Verification runs, how it connects, and how completed results return to your systems.
Configure SMS OTP Verification around each customer journey.
Verification order
Required modules
Return flow- Mobile journey
Add the access check where your workflow needs it.
SMS OTP
E.164 input- Six-digit code
Rate limits
Keep the user step focused and consistent.
API response
Webhooks
Verification status
Custom metadata
Match each result to the correct internal record.
Server-side keys
Test and live endpoints
Return URLs
API access
Keep credentials on the server and integrations connected.
Protect SMS OTP Verification Data
Keep credentials, verification requests, and returned results protected through documented platform security and data controls.
Where SMS OTP
Verification Adds Trust
Add SMS OTP verification to customer journeys where access to a submitted phone number must be confirmed before the next decision.
Add a possession check before loan approvals, payout changes, or high-value payment confirmations.
Require a fresh code before withdrawals, payout address changes, and API key updates.
Verify driver and rider numbers so trip, delivery, and vehicle handover messages reach the right phone.
Confirm a patient’s number before portal access, appointment changes, or reminder messages go out.
Where SMS OTP Verification Adds Trust
Add SMS OTP verification to customer journeys where access to a submitted phone number must be confirmed before the next decision.
Add a possession check before loan approvals, payout changes, or high-value payment confirmations.
Require a fresh code before withdrawals, payout address changes, and API key updates.
Verify driver and rider numbers so trip, delivery, and vehicle handover messages reach the right phone.
Confirm a patient’s number before portal access, appointment changes, or reminder messages go out.
SMS OTP Verification in Practice
Questions Before
You Integrate
Find answers to the most common questions about SMS OTP Verification before you integrate.
Still have a question? Ask a Question
OTP SMS verification sends a one-time code to the submitted mobile number. The user enters the code to confirm access to the
associated device.
Your server can retrieve verification data through the API. Completed results can also be delivered to the webhook configured for the API key.
API keys stay on the server and are sent through the X-SDK-Key header. Each key can retrieve only the verifications it created.
An SMS OTP verification API connects your application to the verification flow so it can create requests, retrieve results, or receive completed outcomes through a webhook.
SMS OTP verification adds a possession-based security check by confirming access to a submitted mobile number. However, it should not be treated as full identity proof or used as the only control for every high-risk action.
No. SMS OTP verification confirms access to a phone number at the time of the check, but it does not independently verify the user’s legal identity.
okID’s public documentation does not provide a confirmed list of supported countries for SMS OTP verification. Confirm market availability and carrier coverage with the Sales team before implementation.
Yes. SMS OTP verification can be added to existing onboarding, authentication, identity verification, or approval workflows as an optional module.
Confirm Phone Access Before Approval
Add SMS OTP verification to customer journeys where mobile access must be confirmed before onboarding, authentication, or approval continues.
Built by Bluem, with ISAE 3402 Type II assurance.