⚡ OTP API Platform

One OTP API.
Four channels.
Zero telecom drama.

Stop juggling SMS vendors, WhatsApp APIs, email providers, and voice gateways. Authyo gives you one clean API—with intelligent fallback, real-time delivery receipts, and zero KYC headaches.

No DLT paperwork
No vendor registration maze
One API for 4 channels
Plug-and-play with fast setup

SMS WhatsApp Email Voice

Get your free API key → Read docs

Single API call

const myHeaders = new Headers();
myHeaders.append("clientId", "YOUR_CLIENT_ID");
myHeaders.append("clientSecret", "YOUR_SECRET");
myHeaders.append("origin", "YOUR_ORIGIN");const requestOptions = {
method: "GET",
headers: myHeaders,
redirect: "follow"
};fetch(
"https://app.authyo.io/api/v1/auth/sendotp?to=&expiry=&otpLength&authWay&otp",
requestOptions
)
.then((res) => res.text())
.then((result) => console.log(result));

📱 Authyo

Your OTP is 847291. Valid for 10 mins. Do not share.

now

99.9% Uptime

4-channel Delivered

Go live in minutes

180+ Countries

No credit card required Free plan available

Used by 500+ developers, SaaS teams, and D2C brands

180+ Countries

99.9% Platform uptime

4-channel Smart fallback

Go live in minutes

Code-first, fast to ship

Send your first OTP
in one API call

Authenticate users with a simple API. No telecom setup. No DLT headaches. Built-in fallback keeps your OTPs delivered and your users happy.

View docs See pricing

const myHeaders = new Headers();
myHeaders.append("clientId", "");
myHeaders.append("clientSecret", "");
myHeaders.append("origin", "");const requestOptions = {
method: "GET",
headers: myHeaders,
redirect: "follow"
};fetch("https://app.authyo.io/api/v1/auth/sendotp?to=&expiry=&otpLength&authWay&otp", requestOptions)
.then((response) => response.text())
.then((result) => console.log(result))
.catch((error) => console.error(error));

var options = new RestClientOptions("https://app.authyo.io")
{
MaxTimeout = -1,
};
var client = new RestClient(options);
var request = new RestRequest(
"/api/v1/auth/sendotp?to=&expiry=&otpLength&authWay&otp",
Method.Get
);
request.AddHeader("clientId", "");
request.AddHeader("clientSecret", "");
request.AddHeader("origin", "");
RestResponse response = await client.ExecuteAsync(request);
Console.WriteLine(response.Content);

<?php$curl = curl_init();curl_setopt_array($curl, array(
CURLOPT_URL            => 'https://app.authyo.io/api/v1/auth/sendotp?to=&expiry=&otpLength=undefined&authWay=undefined&otp=undefined',
CURLOPT_RETURNTRANSFER => true,
CURLOPT_ENCODING       => '',
CURLOPT_MAXREDIRS      => 10,
CURLOPT_TIMEOUT        => 0,
CURLOPT_FOLLOWLOCATION => true,
CURLOPT_HTTP_VERSION   => CURL_HTTP_VERSION_1_1,
CURLOPT_CUSTOMREQUEST  => 'GET',
CURLOPT_HTTPHEADER     => array(
'clientId: ',
'clientSecret: ',
'origin: '
),
));$response = curl_exec($curl);
curl_close($curl);
echo $response;

import http.clientconn = http.client.HTTPSConnection("app.authyo.io")
payload = ''
headers = {
'clientId':     '',
'clientSecret': '',
'origin':       ''
}
conn.request(
"GET",
"/api/v1/auth/sendotp?to=&expiry=&otpLength=null&authWay=null&otp=null",
payload,
headers
)
res = conn.getresponse()
data = res.read()
print(data.decode("utf-8"))

Everything you need. Nothing you don't.

Authyo is built for developers who want to ship fast without wrestling with telecom infrastructure.

True plug-and-play

No telecom setup, no lengthy onboarding. One API key and you're live in minutes.

No DLT paperwork
No vendor onboarding
No registrations or approvals
Hosted, reliable and scalable

One API, four fallback channels

Send OTP via SMS, Email, Voice as your primary channel and let our intelligent fallback ensure delivery every time.

WhatsApp, SMS, Email & Voice
Delivery status & logs
Reduced drop-offs
Smart auto-retry fallback

No DLT, no registration, transparent pricing

Remove DLT friction and start sending OTPs immediately. Pay only for what you use.

Reduced DLT friction
Easy onboarding
Clear, usage-based pricing

Why teams move to Authyo

See how Authyo compares to a typical OTP setup across every dimension.

What teams usually deal with	Typical setup	With Authyo
OTP delivery stack	Multiple vendors and manual setup	One API across channels
Registration & onboarding	Requires extra coordination & slow approval	Intelligent routing and seamless onboarding
Fallback logic	Separate registrations and slow setup	Built-in smart fallback
Plugins & integrations	Custom build or multiple tools	Ready plugins for popular platforms
Routing	Setup files in unclear codebases	Pre-configured routing
Developer experience	Complex docs, hard to iterate	Clean docs, SDKs

Works everywhere your users are

Use Authyo with direct API, plugins, and CRM / workflow automation.

WooCommerce

Plugin available

Install now →

WordPress

Plugin available

Install now →

Shopify

Plugin available

Install now →

Magento

Plugin available

Install now →

Flutter

SDK available

View docs →

& Many More

& more integrations

View all →

Built for teams across industries

Whether you're a fintech startup or an enterprise SaaS — Authyo scales with your OTP needs.

💻

SaaS & Apps

Login authentication
Signup OTP
2FA verification
2FA / MFA flows

🛒

Ecommerce & Checkout

Order confirmation OTP
Payment verification
Guest checkout auth
Delivery confirmation
Return / refund OTP

📋

CRM / Leads & Automation

Lead verification
Secure forms
Automation qualified
Contact enrichment
Re-engagement flows

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Frequently asked questions

Everything you need to know about Authyo's OTP API. Can't find the answer? Talk to us →

OTPs sent via SMS and WhatsApp will display Authyo branding. Email OTPs can be customized with your company logo. For voice call OTPs, users only receive the verification code, and no company or Authyo name is announced.

Authyo is an OTP-as-a-service platform that lets developers send one-time passwords via SMS, WhatsApp, Email, and Voice through a single REST API. You get one API key, one endpoint, and intelligent fallback—Authyo handles all the telecom routing behind the scenes.

No. Authyo is fully managed. We handle all DLT registrations, telecom agreements, and compliance requirements so you don't have to. Just sign up, get your API key, and start sending.

Authyo sends OTPs according to your application's configured setup. You can also define a fallback channel sequence, allowing Authyo to automatically retry delivery on the next configured channel if the primary channel (such as SMS) fails within the specified timeout window—no additional code required.

Most teams go live within a few hours. Sign up, grab your API key, make a test API call, and you're live. There's no lengthy onboarding, no approval process, and no waiting for telecom configurations.

We’re giving you a free $1 wallet balance to get started. Use it to test our services and explore different channels based on your requirements. No credit card is required.

Start building secure OTP flows today

No DLT hassle. No registration maze.
One API, four channels, delivered fast.

Get API key in 2 minutes

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One OTP API.
Four channels.
Zero telecom drama.

Send your first OTP
in one API call

Everything you need. Nothing you don't.

True plug-and-play

One API, four fallback channels

No DLT, no registration, transparent pricing

Why teams move to Authyo

Works everywhere your users are

Built for teams across industries

SaaS & Apps

Ecommerce & Checkout

CRM / Leads & Automation

Frequently asked questions

Start building secure OTP flows today

Company

Quick Links

Legal

One OTP API.Four channels.Zero telecom drama.

Send your first OTPin one API call

Everything you need. Nothing you don't.

True plug-and-play

One API, four fallback channels

No DLT, no registration, transparent pricing

Why teams move to Authyo

Works everywhere your users are

Built for teams across industries

SaaS & Apps

Ecommerce & Checkout

CRM / Leads & Automation

Frequently asked questions

Start building secure OTP flows today

Company

Quick Links

Legal

One OTP API.
Four channels.
Zero telecom drama.

Send your first OTP
in one API call