WebInk Digital

This plugin is an add-on for the <a href="https://wordpress.org/plugins/booking/" rel="ugc">Booking Calendar</a> plugin and requires it to function (version 10.10.2 or newer).
It enhances booking security by introducing One-Time Password (OTP) verification via SMS or email. When a user attempts to confirm a booking, they are prompted to verify the action with an OTP, helping to ensure the authenticity of the request.
SMS verification is provided via the <a href="https://sms.to" rel="nofollow ugc">SMS.to</a> service. You must have an active SMS.to account and API key configured in the plugin settings to enable SMS delivery.
<h3>External Services</h3>
This plugin connects to an external service to send One-Time Passwords (OTP) via SMS as part of the booking verification process.
Service Used: <a href="https://sms.to" rel="nofollow ugc">SMS.to</a> 
What it’s used for: Sending OTPs (One-Time Passwords) via SMS during booking confirmations. 
What data is sent and when: 
– The recipient’s phone number 
– The OTP message content 
These are sent to the SMS.to API at the time a booking requires verification via SMS.
Terms of Service: https://sms.to/terms/ 
Privacy Policy: https://sms.to/privacy-policy/

OTP Add-on for Booking Calendar

Adds One-Time Password (OTP) verification via SMS or email to the Booking Calendar plugin for secure booking confirmations.

rijensky

OtpPal lets your WordPress site send and verify OTP (One-Time Password) messages via WhatsApp. This plugin enables secure phone number verification for your WordPress forms, helping prevent spam and ensuring legitimate user submissions.
Key Features:
<ul>
<li>WhatsApp OTP Delivery: Send one-time passwords directly to users via WhatsApp</li>
<li>Form Plugin Integrations: Seamless integration with various wordpress form plugins for phone verification</li>
<li>Flexible Phone Input: Support for both international and national phone number formats</li>
<li>Easy Configuration: Simple setup through WordPress admin panel</li>
<li>Secure Verification: Server-side validation ensures secure OTP verification</li>
<li>Rate Limiting: Built-in protection against abuse (OtpPal.com)</li>
<li>Customizable UI: Clean, responsive lightbox interface for OTP input</li>
</ul>
Use Cases:
<ul>
<li>Passwordless Logins</li>
<li>Verify phone numbers in contact forms</li>
<li>Prevent spam submissions with phone verification</li>
<li>Ensure legitimate user contact information</li>
</ul>
<h3>Configuration</h3>
<ol>
<li>Navigate to OtpPal > Settings in your WordPress admin panel</li>
<li>Enter your OtpPal API key</li>
<li>Choose your preferred Phone Format:
<ul>
<li>International: Users enter phone numbers with country code (e.g., +1234567890)</li>
<li>National: Users enter phone numbers without country code (e.g., 1234567890)</li>
</ul>
</li>
<li>If using National format, select a Default Country for phone number validation</li>
<li>Click Save Settings</li>
</ol>
<h3>Usage</h3>
Enable passwordless login by embedding the login button anywhere on your site with the [otppal_login] shortcode. 
Add an in-form verifiable phone input using the otppal_phone input, or add a verification modal using the otppal_verify input. 
You can customize the appearance of the login button and the verification modal in the plugin’s config.
OtpPal supports CF7, Elementor Pro, WPForms, Gravity Forms, Fluent Forms, Ninja Forms, Formidable Forms, SureForms 
If you need another integration, please to contact us.
OtpPal will automatically:
<ul>
<li>Initialize the embedded phone widget using your global OtpPal settings (phone format, default country).</li>
<li>Intercept the form submission, open the OTP modal, and only submit after successful verification.</li>
<li>
Write the verified phone number into a hidden field so your form plugin receives it like any other field.
</li>
<li>
Use either <code>otppal_phone</code> or <code>otppal_verify</code> in a single form – never use both.
</li>
</ul>
<h3>Support</h3>
For support, please visit the plugin’s support forum or contact the plugin author.

OtpPal

Client-side plugin for OtpPal – Send and verify OTPs via WhatsApp.

OTP Add-on for Booking Calendar vs OtpPal