SMS API Service

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

Trusted By Brands

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

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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

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

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

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

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

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

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.

Why Do Businesses Love Authkey’s API 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

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

What is an SMS API or messaging API or SMS gateway API?

An SMS API is a programmable code that enables your website, application, mobile app, CRM etc to easily send and receive text messages. It establishes the sending and receiving link between the SMS gateway and integrated application, whereas SMS gateway has a direct connectivity flow with the operator's end. SMS messaging APIs allow you to automate the process of sending SMS messages from your own platform.

You can compose with our API in PHP, C#, Javascript, Java, Python or just in any other language. By integrating API, a business can send alerts and notifications to customers even after business hours.

How does an SMS API work?

An SMS messaging API entrench the text messaging capabilities of an integrated source i.e website, app, software etc. by forming a bond with an SMS gateway. An HTTP SMS API triggers its functionality on occurrence of an internal code action hit. Through SMS APIs, telecommunications carriers can connect to the app resource without the need to rely on an interceder platform or software. Sending SMS messages manually becomes old fashioned after integrating an SMS API. SMS messages can be sent automatically using API protocols, saving you time and money.

What is SMS API integration?

An SMS API integration is connecting the SMS gateway interface code into the application infrastructure code to flow the automated sending and receiving of messages on occurrence of an event. The SMS API integration is done using a HTTP rest API or the SMPP connectivity. The API code should match the functional programming language like PHP, .net, Java, Python, ruby, Javascript, etc. Managing the SMS API integration requires the expertise of a software developer or programmer.

What are the benefits of SMS API integration?

Your current application or software can be enhanced with text messaging capabilities using an SMS API. Few more highlights to cover the benefits are:

Direct request connection to operator.

Direct request connection to operator.
Complete SMS Chanel Automation setup.
SMS API is secure.
Software or applications can send SMS irrespective of human resource.
Real time reporting as Delivery, failure and latency.

How can I start sending messages using SMS API?

Authkey will help you organize and manage your SMS API setup if you want to send messages worldwide. SMS gateways can be used in a variety of ways, including transactional alerts and OTP messages across the globe. We offer you a multichannel messaging API that supports SMS, Voice and Email on a single platform and fully assisted with detailed documentation and developer friendly code instructions. Choose precisely which channels you want to use as well you can use all channels on a single API integration.

Just Sign up to us! Rest our team will handle, to fulfill the best messaging service.

What is the cost of sending SMS through API?

Do you offer a free SMS API?

What is fallback enabled SMS API? Or what is the solution if SMS fails?

As fallback is a sending feature that uses the multi channels simultaneously i.e SMS, Voice & Email. Authkey’s API is fallback-enabled that drives the messaging information on the associated channels. Know more on fallback.

Fallback-enabled sending is highly recommended in case of SMS OTPs or urgent time based messaging. For instance, if the SMS OTP fails/delays, an automated voice call passes the same one time password digits utilizing builtin text to speech tool.

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.