Get a Free WhatsApp Business Account – Includes Onboarding, API Access & Sandbox. Apply Now!

SMS API Service | Authkey.io

SMS SMS API Service

Programmable SMS API to automate your application to send critical messaging, OTPs and notifications.

Trusted By Brands

Acc
Apollo Hospitals
Atulaya Healthcare
Ayushman Hosptial
Union Bank
Vlcc
WH Warehouse
Indian Spinal Injury
Vypar
NeoDove
Upward
Physics Wallah
Acc
Apollo Hospitals
Atulaya Healthcare
Ayushman Hosptial
Union Bank
Vlcc
WH Warehouse
Indian Spinal Injury
Vypar
NeoDove
Upward
Physics Wallah
Acc
Apollo Hospitals
Atulaya Healthcare
Ayushman Hosptial
Union Bank
Vlcc
WH Warehouse
Indian Spinal Injury
Vypar
NeoDove
Upward
Physics Wallah

Send message with programmable SMS API

Enable SMS API service in your application. With the omnichannel experience that SMS gateway API provides, we ensure that your messages are delivered to your customers smoothly and reliably.

Use Authkey’s SMS API to Automate Your Texts

Messaging API is designed in a way that just goes beyond the simple campaign processing, message scheduling, organizing contacts, receiving inbound text, SMS OTPs etc. Below are a couple of reasons behind the businesses choosing to use one-way SMS

Talk to Expert

Two-Factor Authentication(2FA) Two-Factor Authentication(2FA)

Secure your App or Web Application with our simple & ready to configure 2FA APIs. Easily integrate 2FA into your application with an SMS API that utilizes voice and SMS messaging to ensure the security of your customers.

Send SMS OTP Send SMS OTP

Experience simplified SMS API platform, designed to deliver OTP instantly in no time, with enhanced security and speed. Send SMS OTP to verify and restrict Fraud Logins. An enhanced API for OTP failure solution with Fallback.

Alerts & Notifications Alerts & Notifications

Integrate sms API messaging to Reduce no-shows by sending automated alert SMSs. Update customers in real-time and provide them with reminders and alerts in a timely, secure, and reliable way that they can trust.

Transactional SMS Transactional SMS

Give messaging capabilities to your crm to Send SMS messaging. Use SMS API to trigger every transaction detail on billing to your customers timely and helpful payment reminders.

SMS to Email/Voice SMS to Email/Voice

Integrate SMS messaging API into email/voice service so users and agents can communicate seamlessly in the channel they prefer. You can use all channel parallely or simultaneously.

Custom-made Custom-made

Businesses follow different branches and requirement scenarios. We are all ears to listen to your requirements. We will offer you a simplified and flexible SMS API that fulfills your messaging needs. Like hotels.

Platform Built To Scale, Speed And Deliver

Scale Without Worry

Serverless SMS API that is never out of Resource. Just begin with the SMS API. Make expand to multi channel messaging ie. SMS, voice & email. Make few changes in API to avail additional services.

Fallback Ready

Nothing to worry about the SMS OTP failure. Trigger the same OTP information to your client through other channels voice/ emails in critical situations. know more

SMS

On-Time Delivery

No Queue System maintains the required TPS rate with multiple connections with direct operators and makes sure that there is no queue.

One API

Authkey allows you to configure your messaging stream with the omnichannel platform. Integrate SMS, emails, voice calls, and more into your system with one api integration. know more

SMS API developed to fit into your source program Developer-Friendly API code


 <?php

$curl = curl_init();

curl_setopt_array($curl, array(
  CURLOPT_URL => "https://api.authkey.io/request?authkey=AUTHKEY&mobile=RecepientMobile&
  country_code=CountryCode&sms=Hello%2C%20your%20OTP%20is%201234&sender=SENDERID",
  CURLOPT_RETURNTRANSFER => true,
  CURLOPT_ENCODING => "",
  CURLOPT_MAXREDIRS => 10,
  CURLOPT_TIMEOUT => 30,
  CURLOPT_HTTP_VERSION => CURL_HTTP_VERSION_1_1,
  CURLOPT_CUSTOMREQUEST => "GET",
));

$response = curl_exec($curl);
$err = curl_error($curl);

curl_close($curl);

if ($err) {
  echo "cURL Error #:" . $err;
} else {
  echo $response;
}

Use SMS messaging and expand to other channels

The messaging API code adds SMS capabilities to your backend system. An integrated SMS channel features expansion over Voice/Email is more advantageous than using a single medium of critical sending.

Automate Trigger transactional SMS globally with standy voice call setup.

Configurable SMS API with Multi channel Fallback Backup System i.e. dedicated solution to SMS OTP failure.

Systems based on the cloud maintain data securely with global availability and keep up with built in analytics.

Programmable SMS API

Why Do Businesses Love Authkey’s API gateway?

Trustworthy SMS Gateway Trustworthy SMS Gateway

Sending SMS messaging is a great way to make your customer engage for every event. Our Uptime SLA Guarantee and high TPS give you peace of mind while sending SMS OTP, transactional message, notifications, etc., If you are not sending using API integration, use our dedicated bulk SMS marketing portal.

Live Analytics offers combined and detailed insights into delivered, failed and latency metrics.

Seamless SMS API Integration Seamless SMS API Integration

Integrate easily with our SMS API. Built for developers to make the integration process smooth and easy. The API code is available in all programming languages.

We know how to get composited into source code with other platforms. API.

Sample code for PHP, Python, JAVA, C#, cURL, Powershell Node.js, Go, Javascript, Ruby and Swift.

Discover the cost effective pricing

Contact us for full integration support. Our Support Team cannot wait to get you started. Get additional discounts with committed usage. Contact Sales to learn more.

Frequently Asked Questions

Why Choose Authkey ?

We Scale with you

Regardless of one or million messages you send, our SMS infrastructure will ensure you that they deliver on time.

Pay as you Go

Utilization based pricing enables you to get discounted pricing from the beginning while only paying for what you use.

Enterprise-grade

We connect your messaging flow directly over 220+ carriers in 200+ countries for international delivery that is best in class.

Compliance & developers

We align you with the support and developer team. We ensure that your Authkey.io experience is smooth and successful.