santerref

This plugin simplifies how you can add for you by giving you a configuration page to put the code.
Once installed, a new REST API route will be created to output the code: wp-json/mywebsiteisonline/v1/verify
Trusted by developers from all around the world.
<h4>My Website is Online features</h4>
Receive a notification as soon as a problem is detected on your website.
<ul>
<li>1-minute checks</li>
<li>Unlimited monitors</li>
<li>SMS alerts</li>
<li>Unlimited email alerts</li>
<li>HTTP headers and status</li>
<li>Response time monitoring (TTFB)</li>
<li>SSL certificate checks</li>
<li>Multi-factor authentication</li>
<li>12 months log retention</li>
<li>Multiple email recipients</li>
<li>Domain expiration monitoring</li>
<li>Google Web Risk</li>
<li>DNS records monitoring</li>
<li>Slack integration</li>
</ul>
To learn more about My Website is Online visit: <a href="https://mywebsiteisonline.com/" rel="nofollow ugc">https://mywebsiteisonline.com/</a>

Uptime Monitoring for WordPress – My Website is Online

Thanks for the plugin, help me linking my website to My Website is Online.

Simple and works perfectly

My Website is Online is a Web service that monitors your website every minute to check if it's down. Don’t let downtimes impact your business.

pianoweb

SentWatch monitors WordPress email delivery reliability with instant notifications when problems occur.
The plugin sends periodic “heartbeats” to our monitoring service. If these signals stop arriving, it means your site has stopped sending emails (SMTP issues, plugin conflicts, server problems), and we notify you immediately.
Key Features:
<ul>
<li>Hybrid Heartbeat System – Uses HTTP API with email fallback for maximum reliability</li>
<li>Automatic Time Sync – Plugin synchronizes with server time to prevent false alarms</li>
<li>Instant Notifications – Get alerts immediately when email delivery fails</li>
<li>Zero Configuration – Just enter your API key and you’re done</li>
<li>Lightweight – No performance impact on your site (runs in background)</li>
<li>Smart Scheduling – Heartbeats are automatically aligned with server expectations</li>
</ul>
How It Works:
<ol>
<li>Plugin sends a “heartbeat” signal at regular intervals</li>
<li>Our server tracks when heartbeats arrive</li>
<li>If a heartbeat is missed, we verify your site is reachable</li>
<li>If the issue persists, you receive an instant email notification</li>
</ol>
Subscription Plans:
<ul>
<li>Free – 1 site, 24-hour monitoring interval</li>
<li>Silver – 10 sites, 12-hour interval</li>
<li>Gold – 50 sites, 6-hour interval</li>
<li>Platinum – 200 sites, 3-hour interval</li>
</ul>
Note: This plugin requires a free account on <a href="https://panel.sentwatch.com/register.php" rel="nofollow ugc">SentWatch</a>.
<h3>External Services</h3>
This plugin connects to the SentWatch monitoring service to provide email delivery monitoring functionality.
Service Provider: SentWatch (operated by PianoWeb) 
Service URL: https://panel.sentwatch.com
What data is transmitted:
<ol>
<li>
During initial setup – When you connect the plugin with your API key:
<ul>
<li>Site URL</li>
<li>Site name</li>
<li>WordPress version</li>
<li>PHP version</li>
<li>Plugin version</li>
</ul>
</li>
<li>
During periodic heartbeats – Sent via email at intervals determined by your plan (every 3-24 hours):
<ul>
<li>Timestamp</li>
<li>Site URL</li>
<li>Plugin version</li>
</ul>
</li>
<li>
During status checks – When you view the plugin settings page or when the plugin syncs configuration:
<ul>
<li>Site UUID (unique identifier)</li>
<li>API Key (for authentication)</li>
</ul>
</li>
</ol>
When data is sent: 
– On initial plugin activation and setup 
– Periodically via scheduled email heartbeats (frequency depends on your subscription plan) 
– When you manually test email delivery 
– When the plugin checks for configuration updates (daily)
Why this data is sent: 
This data is necessary for the monitoring service to track whether your WordPress site is successfully sending emails. If heartbeat emails stop arriving, the service alerts you that your site’s email functionality may be broken.
Legal: 
– Terms of Service: https://panel.sentwatch.com/terms.php 
– Privacy Policy: https://panel.sentwatch.com/privacy.php
By using this plugin, you acknowledge that your site will communicate with the SentWatch service as described above.

SentWatch – Email Uptime Monitoring

Monitor WordPress email delivery with instant notifications when problems occur.

Uptime Monitoring for WordPress – My Website is Online vs SentWatch – Email Uptime Monitoring