OTP infrastructure for modern products

One API for every OTP journey.

Generate, route and verify one-time passwords through SMS, RCS and WhatsApp using one developer-friendly integration.

See how it works
Developer-friendly API
Multiple delivery channels
Real-time delivery status
Interactive demo

Send an OTP

API online
+91
Verification code Sent by SMS
00:30
4 8 2 9 1 6
Delivery status Delivered successfully
200 OK

This is an interface demonstration. No real OTP will be sent.

One integration for SMS OTP RCS Messaging WhatsApp OTP/API
01 Communication channels

One platform for your essential messages.

Deliver secure OTPs through SMS and WhatsApp, while engaging customers with rich and interactive RCS business messaging.

01 OTP channel
Verification

SMS OTP

Deliver time-sensitive verification codes directly to your customers’ mobile numbers through a simple API.

  • One-time password delivery
  • Delivery-status tracking
  • Custom OTP expiry time
Explore SMS OTP
02 Rich messaging
Customer engagement

RCS Messaging

Create branded and interactive business conversations with rich media, suggested actions and engaging message experiences.

  • Rich cards and media
  • Suggested replies and actions
  • Branded business messaging
Explore RCS
03 Business API
Verification and messaging

WhatsApp OTP/API

Send authentication codes and approved business messages using the WhatsApp Business API through one integration.

  • WhatsApp OTP delivery
  • Template-based messaging
  • Message-status callbacks
Explore WhatsApp API
02 How it works

From API request to successful delivery.

Connect your application to OTPPilot, choose the required communication channel and monitor every message through a simple, structured delivery flow.

SMS OTP flow

Generate and deliver a secure one-time password through SMS.

View API integration
Live message journey SMS OTP delivery
Processing
01
API request Application sends request POST /v1/otp/send
Accepted
02
Routing SMS channel selected Message prepared for delivery
Routed
03
Delivery OTP sent through SMS Message sent to the recipient
Sent
04
Callback Delivery status returned Webhook updates your application
Delivered
03 Solutions

Communication built around real customer journeys.

Use OTPPilot to support secure authentication, transactional communication and customer engagement across SMS, RCS and WhatsApp.

01
Authentication

Login verification

Add a one-time password step to login and sign-up journeys through SMS or WhatsApp.

02
Transactional

Transaction confirmation

Add OTP verification to sensitive transactions before the requested action is completed.

Recommended channels
SMS OTP WhatsApp OTP
03
Account access

Account recovery

Help users recover access using a temporary verification code delivered to their registered number.

Recommended channels
SMS OTP WhatsApp OTP
04
Customer engagement

Rich RCS campaigns

Build interactive customer messages using branded content, rich cards, media and suggested actions.

05
Notifications

Customer alerts

Send important service updates, reminders and transactional alerts through available channels.

Available channels
SMS RCS WhatsApp
06
Automation

Delivery callbacks

Update your application using webhook events when a message is accepted, sent, delivered or failed.

webhook.status delivered
04 Developer API

Start sending with a simple API.

Connect your application to SMS OTP, RCS Messaging and WhatsApp OTP/API using structured API requests and delivery-status callbacks.

Clear API structure

Consistent request and response formats.

Webhook events

Receive message and delivery-status updates.

Familiar tools

Integrate using your preferred language.

Read API documentation
send-otp Test environment
Example response 200 OK 
{
  "success": true,
  "request_id": "otp_demo_482916",
  "channel": "sms",
  "status": "accepted"
}
The endpoint and API key shown here are interface examples only. Replace them with your production API details when the service is connected.
Available integrations

Use the relevant endpoint for each communication channel.

POST /v1/otp/send Send SMS OTP
POST /v1/rcs/send Send RCS message
POST /v1/whatsapp/send Send WhatsApp message
GET /v1/messages/{request_id} Check message status
05 Security controls

Protection designed for every message journey.

Configure authentication controls, request restrictions and delivery monitoring around your SMS OTP, RCS and WhatsApp workflows.

Authentication policy

OTP security configuration

Policy active
OTP expiration Limit how long a generated code remains valid.
5 minutes
Verification attempts Restrict repeated incorrect-code attempts.
3 attempts
Request rate limit Control repeated OTP requests from one user.
Mask sensitive values Avoid displaying complete recipient details.
Settings shown are an interface demonstration.
01

Protected API credentials

Keep production credentials outside frontend JavaScript and send requests through a protected server environment.

02

Webhook verification

Verify callback requests before using delivery-status data inside your application.

03

Delivery monitoring

Track accepted, sent, delivered and failed message states through status callbacks.

04

Configurable OTP policies

Set expiration times, verification limits and request restrictions for OTP flows.

OTPPilot’s frontend demonstration does not store credentials or send real messages. Production security controls require a protected API and server-side setup.

Frequently asked questions

Everything you need to know

Learn how OTPPilot helps businesses deliver SMS OTP, use WhatsApp for authentication and connect with customers through RCS messaging.

OTPPilot provides SMS OTP, WhatsApp OTP/API and RCS business messaging solutions. We do not currently provide email OTP services.

No. OTPPilot offers RCS as a rich business messaging service. It can support branded messages, images, buttons and interactive customer communication where RCS is available.

The public website is built with HTML, CSS and JavaScript, so its demonstrations do not send real messages. Real delivery requires a secure server-side API integration.

Contact our sales team with your selected service, destination countries and estimated monthly messaging volume. We will provide pricing based on your requirements.

Yes. Your website, mobile application or business system can connect to the future OTPPilot backend through secure API endpoints. Integration details will depend on your technical setup.

WhatsApp business messages generally use approved message templates and must follow WhatsApp platform policies. Our team can help explain the setup required for your use case.
Ready when you are

Turn every authentication request into a connected journey.

Talk to our team about SMS OTP, RCS Messaging, WhatsApp OTP/API and the right integration for your business.

Explore the API
SMS OTP
RCS Messaging
WhatsApp OTP/API
otppilot.com