Francisco Moreno

<p><strong>LMN Site Monitor</strong> is a lightweight WordPress monitoring plugin that keeps track of your websites and alerts you when something goes wrong. Monitor uptime, SSL certificate expiration, and response time directly from your WordPress dashboard — no external SaaS required.</p>
<p><strong>Main Key features</strong></p>
<ul>
<li>Uptime monitoring (HTTP/HTTPS) with configurable intervals.</li>
<li>SSL certificate expiration checks with full SNI support.</li>
<li>Domain expiry notifications.</li>
<li><strong>Malware scanning</strong> powered by Google Safe Browsing API and URLhaus (abuse.ch); per-site scheduled scans (never / daily / weekly); downloadable PDF security report.</li>
<li>Response latency tracking with full history stored in a dedicated database table.</li>
<li>Performance charts (bar, line, donut) powered by self-hosted Chart.js — no external CDN.</li>
<li>Statistics modal with per-site avg / min / max response time and uptime %; CSV and PDF export.</li>
<li>Automatic retry after downtime to avoid false positives.</li>
<li>Instant HTML email alerts (with automatic dark mode support).</li>
<li>Dashboard widget with customizable monitor limits.</li>
<li>CSV export/import of monitored sites.</li>
<li>Fully translatable (16 languages) and optimized for modern PHP environments.</li>
</ul>
<p>LMN Site Monitor is designed to be fast, accessible, and WordPress-native — giving you essential monitoring tools without unnecessary complexity. Learn more at LMN Site Monitor official page: <a href="https://lumina.fmkr.net/site-monitor/" rel="nofollow ugc">https://lumina.fmkr.net/site-monitor/</a></p>
<h3>Localization</h3>
<p>This plugin is fully translatable and currently includes base translations for:</p>
<ul>
<li>English (en_US)</li>
<li>Spanish (es_ES)</li>
<li>Catalan (ca)</li>
<li>French (fr_FR)</li>
<li>Arabic (ar)</li>
<li>German (DE)</li>
<li>Basque (eu)</li>
<li>Italian (it_IT)</li>
<li>Japanese (ja)</li>
<li>Korean (ko_KR)</li>
<li>Dutch (nl_NL)</li>
<li>Portuguese (pt_PT)</li>
<li>Turkish (tr_TR)</li>
<li>Ukrainian (uk)</li>
<li>Simplified Chinese (zh_CN)</li>
</ul>
<p>If you would like to contribute a new translation, you can do so via WordPress.org’s translation platform.</p>
<h3></h3>
<p>Version: 2026-04-02 — v0.9.2</p>
<ul>
<li>FIX: URLhaus (abuse.ch) integration now requires an API key (Auth-Key header); added URLhaus API Key field in Settings <span aria-hidden="true" class="wp-exclude-emoji">→</span> Security scanning. Without a key the URLhaus check is skipped gracefully.</li>
<li>FIX: Scan modal failed to open with “i18n is not defined” JS error — resolved by declaring i18n from cfg.i18n inside initScanModal().</li>
<li>FIX: PDF security report printed blank — modal is now temporarily moved to document.body before window.print() and restored afterwards so @media print selectors work correctly.</li>
<li>FIX: “Scanning…” text rendered as garbled bytes (double-encoded UTF-8) — replaced with an animated indeterminate progress bar.</li>
<li>IMPROVE: Scan badge button removed from card header; scan result (shield icon + date + status label) now appears as an inline row inside the card metadata block, consistent with the rest of the card layout.</li>
<li>FIX: “Scan” button font-size reduced to match the rest of the card action buttons (11 px).</li>
<li>IMPROVE: Status labels renamed to “No incidents” / “Incidents detected” (es_ES: “Sin incidencias” / “Incidencias detectadas”), color-coded green and red respectively; all 16 .po/.mo files updated.</li>
<li>NEW: Help tab with 12 documented sections covering all plugin features: Getting started, Uptime monitoring, SSL & domain expiry, Email alerts, Performance charts & statistics, Malware scanning, WHOIS / DNS lookup, Dashboard widget, CSV export / import, Card management, and step-by-step guides for both API keys (Google Safe Browsing and URLhaus).</li>
<li>IMPROVE: Top toolbar now shows a compact API keys notice with direct links to Google Cloud Console and abuse.ch, replacing the old generic description block.</li>
<li>IMPROVE: 21 new i18n strings added to all 16 supported languages.</li>
</ul>
<h3></h3>
<p>Version: 2026-03-25 — v0.9.1</p>
<ul>
<li>NEW: Malware scanning powered by Google Safe Browsing API (free key required) and URLhaus (abuse.ch, no key required). Scan button on each site card opens a security report modal.</li>
<li>NEW: Per-site automatic scan schedule (Never / Daily / Weekly) with WP Cron integration.</li>
<li>NEW: Security report modal with per-source results, threat types, global status, and one-click PDF download (window.print()).</li>
<li>NEW: Google Safe Browsing API Key field in Settings <span aria-hidden="true" class="wp-exclude-emoji">→</span> Security scanning section.</li>
<li>NEW: 28 new i18n strings added to all 16 supported languages.</li>
</ul>
<h3></h3>
<p>Version: 2026-03-16 — v0.9.1</p>
<ul>
<li>NEW: Performance charts (bar, line, donut) powered by self-hosted Chart.js 4.5.1 (GDPR-safe, no external CDN).</li>
<li>NEW: Response-time history stored in a dedicated database table (<code>lmnsimo_response_log</code>); rolling 500-entry window per site; table removed cleanly on uninstall.</li>
<li>NEW: Statistics modal with per-site total checks, avg / min / max response time and uptime %; accessible from the Monitor tab.</li>
<li>NEW: CSV export and Print/PDF export of the statistics table.</li>
<li>NEW: Period selector (Last 24 h · Last 7 days · Last 30 days) for charts and statistics.</li>
<li>NEW: 25 new strings fully translated across all 16 supported languages; <code>.pot</code> and all <code>.po</code> files updated.</li>
<li>IMPROVE: Charts and statistics modal respect the plugin’s light/dark theme.</li>
</ul>
<h3></h3>
<p>Version: 2026-03-14 — v0.8.1</p>
<ul>
<li>FIX: Fix translation errors.</li>
</ul>
<h3></h3>
<p>Version: 2026-03-14 — v0.8.0</p>
<ul>
<li>NEW: New languages: Arabic, German, Basque, Italian, Japanese, Korean, Dutch, Portuguese, Turkish, Ukrainian, and Simplified Chinese.</li>
<li>NEW: Automatic retry after downtime to avoid false positives.</li>
<li>NEW: Domain expiry notifications.</li>
<li>MAINT: i18n maintained; PHPCS/WPCS compliant.</li>
</ul>
<h3></h3>
<p>Version: 2026-03-03 — v0.7.0</p>
<ul>
<li>NEW: Cards are now wider, displaying more information at a glance.</li>
<li>NEW: Bulk actions now include sorting options: alphabetical (A<span aria-hidden="true" class="wp-exclude-emoji">→</span>Z) and by date added.</li>
<li>NEW: Drag-and-drop card reordering with persistent storage between sessions.</li>
<li>NEW: Pin system — pin any site to keep it fixed at the top, excluded from sorting.</li>
<li>NEW: WHOIS / DNS lookup button on each card: shows IP, DNS provider, NS, MX records, TTL and SSL expiry. Native PHP only, no external APIs or API keys required.</li>
<li>NEW: JetBrains Mono font integrated for monospace elements, self-hosted (GDPR-safe, no external CDN).</li>
<li>IMPROVE: Full PHPCS / WPCS compliance — zero warnings. Proper nonce and capability checks, sanitization and escaping throughout.</li>
<li>IMPROVE: All new strings are fully translatable and i18n-compatible.</li>
<li>IMPROVE: Responsive design preserved and refined across all screen sizes.</li>
<li>FIX: Removed duplicate <code>wp_mail_failed</code> hook and unified error handlers.</li>
<li>FIX: Native WP cron schedules (<code>hourly</code>, <code>daily</code>) are no longer overwritten.</li>
<li>FIX: Added <code>file_exists()</code> check before reading <code>changelog.txt</code>.</li>
<li>FIX: Added missing <code>wp_unslash()</code> in widget preferences handler.</li>
<li>FIX: SSL badge severity now syncs with the user-configured expiry threshold.</li>
<li>FIX: PHPCS <code>MissingTranslatorsComment</code> resolved in alert email builders.</li>
<li>IMPROVE: Removed dead <code>load_textdomain()</code> method.</li>
<li>IMPROVE: Fixed inconsistent indentation in <code>ajax_save_order</code>.</li>
</ul>
<h3></h3>
<p>Version: 2025-10-31 — v0.6.5</p>
<ul>
<li>NEW: Full internationalization (en_US, es_ES, ca, fr_FR).</li>
<li>NEW: Added Catalan (ca) and French (fr_FR) translations.</li>
<li>IMPROVE: Hybrid textdomain loader – automatically loads WP.org language packs and falls back to /languages for ZIP installs.</li>
<li>FIX: Added translators comments for all placeholders to comply with WordPress I18n standards.</li>
<li>FIX: Escaped all dynamic outputs in admin interface and header tips.</li>
<li>MAINT: Removed deprecated load_plugin_textdomain() function per Plugin Check recommendations.</li>
</ul>
<h3></h3>
<p>Version: 2025-10-25 — v0.6.4</p>
<p>– Full sanitization and 0 warnings<br />
– All PHPCS/WPCS warnings removed.<br />
– Full sanitization and reordered nonce verification.<br />
– PHP 8.3+ and WordPress 6.8.3+ compatibility.</p>
<h3></h3>
<p>Version: 2025-10-16 — v0.6.3</p>
<p>UI:<br />
– FIX: Unique IDs in forms (nonces and submit buttons).<br />
– FIX: Console warnings removed for duplicated #_wpnonce and #submit IDs.<br />
– IMPROVE: Accessibility and DOM structure of the admin panel.</p>
<p>Maintenance:<br />
– Version bumped to v0.6.3.</p>
<h3></h3>
<p>Version: 2025-10-15 — v0.6.2</p>
<p>UI:<br />
– IMPROVE: Unified blue header (h2.hndle) with v0.6.2 badge.<br />
– ADD: Lightweight Markdown rendering (titles, lists, <strong>bold</strong>, <code>code</code>, separators).<br />
– KEEP: Consistent padding and structure (.postbox.lm-card > h2.hndle + .inside).</p>
<p>Maintenance:<br />
– Version bumped to v0.6.2.</p>
<h3></h3>
<p>Version: 2025-10-15 — v0.6.1</p>
<p>UI:<br />
– NEW: “Changelog” tab with direct reading of <code>changelog.txt</code>.<br />
– IMPROVE: Body with padding, clean background, and better typographic rhythm.<br />
– IMPROVE: Lightweight Markdown rendering: <strong>bold</strong>, <code>code</code>, titles (# ## ###), and highlighted list prefixes (NEW, FIX, IMPROVE…).</p>
<p>Maintenance:<br />
– Version bumped to v0.6.1.</p>
<h3></h3>
<p>Version: 2025-10-14</p>
<p>Functional:<br />
– SMTP operational: form aligned with real keys (<code>smtp_*</code>) and authentication.<br />
– Keeps SMTP password when saved empty (not overwritten).<br />
– Compatibility with Gmail (app passwords) and Office 365.</p>
<p>UI:<br />
– Listing replaced by responsive card grid (auto-fit/minmax).<br />
– “OK” status (green/white text) and “Down” (red/white text).<br />
– Down sites with red border + soft pulse (respects reduced motion).<br />
– Inline styles cleaned <span aria-hidden="true" class="wp-exclude-emoji">→</span> moved to <code>assets/admin-theme.css</code>.</p>
<p>Maintenance:<br />
– Nonces and handlers verified; no changes in cron or check logic.<br />
– CSV import/export and bulk actions unchanged.</p>
<h3></h3>
<p>Version: 2025-10-07 — v0.6.0</p>
<ul>
<li>NEW: CSV import using the same format as export (adds URLs without removing existing ones).  </li>
<li>NEW: Bulk actions in list (Delete selected) using standard WordPress handlers.  </li>
<li>IMPROVE: Listing UI: master checkbox, batch action bar, and confirmations.  </li>
<li>IMPROVE: Error handling and post-action messages for imports or batch actions.</li>
</ul>
<h3></h3>
<p>Version: 2025-10-06 — v0.5.3</p>
<ul>
<li>NEW: CSV export from the “About Site Monitor” section.  </li>
<li>NEW: “About Site Monitor” section with quick metrics and cron status.  </li>
<li>IMPROVE: Minor cleanup in headers and constants (VERSION).</li>
</ul>
<h3></h3>
<p>Version: 2025-10-06 — v0.5.2</p>
<ul>
<li>NEW: “About Site Monitor” box in the right column of the admin dashboard.</li>
</ul>
<h3></h3>
<p>Version: 2025-10-06 — v0.5.1</p>
<ul>
<li>CHANGE: Default light HTML email + automatic dark mode with <code>prefers-color-scheme</code>.</li>
</ul>
<h3></h3>
<p>Version: 2025-10-06 — v0.5.0</p>
<ul>
<li>NEW: HTML alert email with badges, detail table, and action buttons.  </li>
<li>NEW: Per-user preference in dashboard widget (number of sites displayed).  </li>
<li>IMPROVE: Classic UI improved (light/dark theme, responsive tables and forms).  </li>
<li>FIX: Text contrast in dark theme (labels, cells, and descriptions).</li>
</ul>
<h3></h3>
<p>Version: 2025-10-05 — v0.4.0</p>
<ul>
<li>NEW: Admin page with listing, quick actions, and settings.  </li>
<li>NEW: HTTP and SSL expiry checks with email alerts.  </li>
<li>NEW: Configurable cron (5 min, 15 min, hourly, daily) and “force check” option.</li>
</ul>
<h3></h3>


LMN Site Monitor

A lightweight WordPress uptime and SSL monitoring plugin with email alerts, latency tracking, and dashboard widget.

lukmeyer

<p>LukStack Uptime Monitor is a lightweight yet powerful website monitoring solution built for agencies, freelancers, and web professionals who manage multiple websites.</p>
<p>Track uptime, response times, and SSL certificate expiration for all your client sites from a single WordPress dashboard. When something goes wrong, you will know immediately through email notifications or webhook integrations with Slack, Discord, and other services.</p>
<h4>Free Plan Features</h4>
<ul>
<li><strong>Uptime Monitoring</strong> – Automatic checks every 15 minutes</li>
<li><strong>Monitor up to 2 websites</strong></li>
<li><strong>Webhook Support</strong> – Native integration with Slack, Discord, Microsoft Teams, and generic webhooks</li>
<li><strong>Manual Checks</strong> – Test any site instantly with one click</li>
<li><strong>Dashboard Widget</strong> – Quick status overview right on your WordPress dashboard</li>
</ul>
<h4>Pro Plan Features</h4>
<ul>
<li><strong>Everything in Free</strong></li>
<li><strong>Monitor up to 100 websites</strong></li>
<li><strong>5 minute check interval</strong> for faster downtime detection</li>
<li><strong>SSL Certificate Monitoring</strong> – Get warned before certificates expire</li>
<li><strong>Website Performance Tracking</strong> – Monitor response times with millisecond precision</li>
</ul>
<h4>Who Is This For?</h4>
<ul>
<li><strong>Web Agencies</strong> managing client websites</li>
<li><strong>Freelancers</strong> maintaining multiple projects</li>
<li><strong>Site Owners</strong> who want peace of mind</li>
<li><strong>DevOps Teams</strong> needing a simple monitoring solution</li>
</ul>
<h4>How It Works</h4>
<ol>
<li>Add a website URL to monitor</li>
<li>LukStack Uptime Monitor checks the site automatically</li>
<li>If the site goes down or returns an error, you get notified</li>
<li>When the site recovers, you get a recovery notification</li>
</ol>
<h4>Webhook Integrations</h4>
<p>LukStack Uptime Monitor automatically formats notifications for popular services:</p>
<ul>
<li><strong>Slack</strong> – Rich message attachments with color-coded severity</li>
<li><strong>Discord</strong> – Embedded messages with status information</li>
<li><strong>Microsoft Teams</strong> – Via generic webhook connector</li>
<li><strong>Zapier / Make</strong> – JSON payload for custom automations</li>
</ul>
<h4>Privacy</h4>
<p>LukStack Uptime Monitor only stores the URLs you choose to monitor and their status data. No personal information is collected or transmitted to external servers except for the webhook notifications you configure.</p>
<p>This plugin uses Freemius for license management and opt-in usage tracking. Freemius collects anonymized data only when users explicitly opt in. See the Freemius Privacy Policy: https://freemius.com/privacy/</p>
<h3>External services</h3>
<p>This plugin connects to external services as part of its core monitoring functionality. Below is a description of each service, what data is sent, and when.</p>
<h4>Monitored Websites</h4>
<p>LukStack Uptime Monitor sends HTTP requests to the website URLs you add for monitoring. This is the core functionality of the plugin and is required to check uptime and response times. An SSL connection on port 443 is also made to check the SSL certificate expiration date for HTTPS sites (Pro). These requests are sent automatically via WordPress Cron and when you manually click “Check now”. The data sent is a standard HTTP GET request with a custom user agent header. No personal data is transmitted.</p>
<h4>Freemius</h4>
<p>This plugin uses Freemius SDK for license management, usage tracking (opt-in only), and the upgrade flow. When a user opts in, anonymized data such as the site URL, WordPress version, PHP version, and plugin version may be sent to Freemius servers. Users can opt out at any time.</p>
<p>This service is provided by Freemius, Inc.<br />
Terms of Service: https://freemius.com/terms/<br />
Privacy Policy: https://freemius.com/privacy/</p>
<h4>Slack (optional)</h4>
<p>If you configure a Slack webhook URL in the plugin settings, LukStack Uptime Monitor sends POST requests to the Slack Incoming Webhooks API when a monitored site changes status (goes down, recovers, or has SSL issues). The data sent includes the website URL, its status, response time, and a timestamp. No personal data is transmitted.</p>
<p>This service is provided by Slack Technologies, LLC / Salesforce, Inc.<br />
Terms of Service: https://slack.com/terms-of-service<br />
Privacy Policy: https://slack.com/privacy-policy</p>
<h4>Discord (optional)</h4>
<p>If you configure a Discord webhook URL in the plugin settings, LukStack Uptime Monitor sends POST requests to the Discord Webhooks API when a monitored site changes status. The data sent includes the website URL, its status, response time, and a timestamp. No personal data is transmitted.</p>
<p>This service is provided by Discord, Inc.<br />
Terms of Service: https://discord.com/terms<br />
Privacy Policy: https://discord.com/privacy</p>
<h4>Generic Webhooks (optional)</h4>
<p>You may configure any third-party webhook URL (e.g. Microsoft Teams, Zapier, Make, or a custom endpoint). When a monitored site changes status, a POST request with a JSON payload is sent to that URL. The data sent includes the website URL, its status, response time, and a timestamp. No personal data is transmitted. Please refer to the terms of service and privacy policy of the respective service you configure.</p>
<h3>Additional Information</h3>
<h4>Requirements</h4>
<ul>
<li>WordPress 5.8 or higher</li>
<li>PHP 7.4 or higher</li>
<li>PHP extensions: curl, openssl, json</li>
</ul>
<h4>Support</h4>
<p>For support questions, please use the WordPress.org support forum for this plugin.</p>
<h4>Credits</h4>
<p>Developed by Luk Meyer.</p>


LukStack Uptime Monitor

Monitor multiple websites for uptime, performance, and SSL certificate expiration. Get instant alerts via email, Slack, or Discord when issues occur.

LMN Site Monitor vs LukStack Uptime Monitor