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SMS API Build Scalable Messaging Solutions

SMS Gateway API. The Messaging API code empowers you to effortlessly incorporate robust messaging features into enterprise applications.

Send messaging

Trusted By 10000+ Developers

Integrate a Developer-Friendly free SMS API in minutes of time!

Send SMS API is designed to be effortlessly accessible for developers. Supporting all major programming languages, including PHP, .NET, C#, Java, Python, and Ruby, getting started with text message api is as simple as opening a webpage at a URL. Experience seamless integration and start sending text messages with ease.

Seamless Scaling: Global Solutions through SMS API integration

Seamless Scaling

Seamlessly Send Transactional SMS, Voice, Email, and WhatsApp Messages with One API.

  • Expand business reach across 200+ countries with confidence, thanks to localized senders, compliance tools, and adherence to global guidelines. Send one or millions of messages.
  • Effortlessly manage compliance, deliverability, replies, and more through Authkey's programmable software.
  • Stay informed with real-time analytics to monitor message delivery and engagement, allowing you to troubleshoot effectively.

Experience the business SMS API solution, all in one place. Get started with the Programmable Messaging API today.

Integration Ways to Send SMS API

Integrate our comprehensive SMS API options, including SMS SMPP, multichannel API, and one-time password or two factor authentication (2FA) solutions. Authkey’s API easily composes any business applications or software, empowering you with robust text messaging capabilities.

Few Lines of 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;
}

Need Help! Quick integrate with SMS API

Use the above provided code snippet to effortlessly incorporate our SMS API into your existing software, CRM application, or website, using the programming language you are already familiar with.

Why Authkey.io?

Achieve Global Reach

Board our intelligent routing gateway to deliver SMS messages to hundreds, thousands, or even millions of customers worldwide.

Quick Start APIs

Developer guides, pre-built integrations, and SDKs, you can move from concept to execution in a matter of minutes.

Real-Time Insights

SMS messages with API, network-level deliverability metrics, providing you with valuable and up-to-date information.

Globally Compliant

Ensure Data Privacy and Compliance: We prioritize protecting customer data privacy, such as GDPR, HIPAA, 10DLC, and CCPA.

Ready to Send SMS

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.