Smstools

One Time Passwords

Use OTP authentication through SMS or Voice to secure your data, accounts, and user transactions through Two-Factor Authentication API.

What is an OTP (One Time Password)?

Just a password as security isn’t secure enough anymore. Protect your customers from unauthorized accesses with Two Factor Authentication (2FA) or a One Time Password (OTP).

A One Time Password is a series of characters or numbers that are automatically generated for a single login attempt. One Time Passwords can be sent through SMS or Voice to the user's phone and are used to protect web-based services, private information, and data.

An OTP adds an additional layer of security to your application. Users no longer have to log in solely with their password, but they also need to identify via an OTP through SMS or Voice.

One Time Passwords through SMS

With an open rate of 98% within 30 seconds, SMS is known for its high reliability. By sending one-time passwords via SMS, you are sure to reach your users no matter where they are. Even offline, when users do not have access to the internet, they can still use this OTP authentication solution.

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One Time Passwords
One Time Passwords

One Time Passwords through Voice

An alternative to SMS is Voice. With Voice, the spoken password is received as a phone call on the user's cell phone. You can also use Voice as a backup if your SMS message is not delivered.

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One Time Passwords

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<?php
	$ch = curl_init();
	$url = "https://api.smsgatewayapi.com/v1/message/send";
	$client_id = "XXX"; // Your API key
	$client_secret = "YYY"; // Your API secret
	$data = [
		'message' => "Hello World", //Message
		'to' => "", //Receiver
		'sender' => "YourName" //Sender
	];
	curl_setopt($ch, CURLOPT_URL, "$url");
	curl_setopt($ch, CURLOPT_POST, true);
	curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
	curl_setopt($ch, CURLOPT_VERBOSE, true);
	curl_setopt($ch, CURLOPT_HTTPHEADER, [
		"X-Client-Id: $client_id",
		"X-Client-Secret: $client_secret",
		"Content-Type: application/json",
	]);
	curl_setopt($ch, CURLOPT_POSTFIELDS, json_encode($data));
	$response = curl_exec($ch);
?>

Easy SMS API integration

With our SMS API you can extend your website or platform with an SMS integration. Integrating our SMS API is very easy so you can quickly connect your website or platform to our powerful SMS features.

API documentation

Other products

  • SMS SOFTWARE

    Send & receive SMS messages through our software

    Read more
  • VIRTUAL NUMBER

    Receive SMS messages through a virtual number

    Read more
  • SMS GATEWAY API

    Integration tool for developers

    Read more
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