Michael Ott

It’s often too easy to make edits to your web site that result in a broken link. This plugin will automatically email the web site administrator (or a specified email address) whenever a 404 is encountered, along with a link to the page the 404 originated from. With this knowledge in hand, you can search the page for the problem and either remove or fix it.
Notifications are also triggered by missing media, such as images, video, CSS files and more.
<h3>Support</h3>
Report any issues at the official <a href="https://wordpress.org/support/plugin/404-notify/" rel="ugc">404 Notify Support</a> WordPress page.
<h3>How to use</h3>
Once activated, notifications are automatially sent to the site administrator, or, you can specify an alternative email address in Settings -> General and look for the 404 Notify email address field.
<h3>Uninstall</h3>
Deactivate the plugin, delete if desired.

404 Notify

It works as presented. When an internal link leads to 404 you get an email alert. 

Job well done

Get a notification whenever a 404 is encountered on your web site.

cosimavogel

GAISEO – AI SEO Starter analyzes websites for AI-search visibility, checking structured data, content relevance, and AI-SEO readiness. The plugin runs fully locally unless the user connects external APIs, and is built for transparency and privacy.
GAISEO is your essential assistant for the new era of search. As AI and Large Language Models (LLMs) become the primary way users discover information, ensuring your website is structured for machine readability is critical.
Why AI SEO Matters: 
– 40% of Google searches now use AI-powered features 
– LLMs like ChatGPT, Claude, and Gemini crawl websites for training data 
– Traditional SEO focuses on human users, but AI SEO optimizes for machine understanding 
– Proper structured data and semantic HTML improve AI comprehension
What GAISEO Does: 
This plugin runs a comprehensive suite of 40+ checks across 12 categories, analyzing everything from semantic HTML structure and structured data (Schema.org) to E-E-A-T signals and content freshness.
Key Features: 
* Comprehensive Analysis: 40+ checks across 12 categories 
* AI-Focused Optimization: Specifically designed for LLM and AI crawler compatibility 
* Real-Time Dashboard: Live health score and detailed recommendations 
* LLMs.txt Generator: Create a llms.txt file to help AI crawlers understand your site 
* AI Crawler Manager: Control which AI bots (GPTBot, ClaudeBot, etc.) can crawl your site via robots.txt 
* Content Freshness Checker: See which pages are fresh, aging, stale, or critical 
* Schema Markup Detector: Detect existing Schema.org JSON-LD markup on all your pages 
* 3 Full Scans/Month: See all task priorities (high, medium, low) with full scans 
* WordPress Standards: Fully compliant with WordPress.org guidelines
Check Categories: 
1. Headings – H1 structure and hierarchy 
2. Images – Alt text, format optimization, and content relevance 
3. Structured Data – Schema.org markup and JSON-LD validation 
4. Internationalization – Language attributes and hreflang tags 
5. Freshness – Content recency and update frequency 
6. E-E-A-T & Trust – Expertise, Experience, Authoritativeness, and Trustworthiness 
7. Content Quality & Relevance – Readability and topic coherence 
8. HTML Semantic Structure – Proper HTML5 semantic elements 
9. FAQ – FAQ schema and content structure 
10. Internal Linking – Link structure and anchor text optimization 
11. Header & Footer – Site structure and navigation 
12. Technical AI SEO – Core Web Vitals and performance metrics
It provides you with a clear “Health Score” and a detailed breakdown of every check, explaining why it’s important for AI and giving you actionable recommendations to fix any issues.
<h3>Support</h3>
For support, feature requests, or bug reports, please visit: 
– Website: https://www.gaiseo.com 
– Support: https://www.gaiseo.com/support 
– Documentation (EN): https://gaiseo.com/docs/wordpress-plugin/ 
– Documentation (DE): https://gaiseo.com/de/doku/wp-plugin-dokumentation/ 
– GitHub: https://github.com/gaiseo/gaiseo-ai-seo-checker
<h3>External Services</h3>
This plugin may optionally connect to third-party APIs such as OpenAI or Azure OpenAI to perform AI-based content analysis. These services are used only when explicitly configured by the site administrator. No data is sent automatically.
Supported API Providers: 
* OpenAI API – https://platform.openai.com/ 
 * Terms: https://openai.com/policies/terms-of-use 
 * Privacy: https://openai.com/policies/privacy-policy 
* Azure OpenAI Service – https://azure.microsoft.com/en-us/products/cognitive-services/openai-service/ 
 * Terms: https://azure.microsoft.com/en-us/support/legal/ 
 * Privacy: https://privacy.microsoft.com/en-us/privacystatement
Important Notes: 
* API connections are completely optional 
* All analysis can be performed locally without external APIs 
* API keys are stored securely in WordPress options 
* No data is transmitted unless explicitly configured by the administrator 
* The plugin includes a managed service option with limited free API calls
<h3>Privacy</h3>
This plugin does not track users or visitors.
It does not store or transmit personal data.
If external APIs are used, they are triggered only by the administrator and only for the content being analyzed. No site usage statistics or user behavior are collected or transmitted.
Data Handling: 
* All analysis runs locally on your server 
* No automatic data transmission 
* API calls are made only when explicitly initiated by the administrator 
* No tracking cookies or analytics 
* No user behavior monitoring 
* GDPR compliant by design
<h3>Development</h3>
GAISEO is actively developed and maintained by: 
– Lead Developer: Cosima Vogel 
– Company: Productive AI GmbH 
– Website: https://www.gaiseo.com 
– Email: support@gaiseo.com
<h3>Credits</h3>
GAISEO uses the following technologies and standards: 
– WordPress Plugin API 
– Schema.org structured data 
– Core Web Vitals metrics 
– Google’s E-E-A-T guidelines 
– W3C accessibility standards 
– PHP 7.4+ compatibility 
– Modern JavaScript (ES6+) 
– CSS Grid and Flexbox
<h3>Technical Requirements</h3>
<ul>
<li>WordPress: 5.0 or higher</li>
<li>PHP: 7.4 or higher</li>
<li>MySQL: 5.6 or higher</li>
<li>Memory: 128MB minimum (256MB recommended)</li>
<li>Disk Space: 10MB for plugin files</li>
<li>Browser: Modern browsers (Chrome, Firefox, Safari, Edge)</li>
</ul>
<h3>Performance Impact</h3>
GAISEO is optimized for performance: 
– Minimal database queries 
– Efficient caching system 
– Background task processing 
– Optimized asset loading 
– No impact on frontend performance 
– Silent task management

GAISEO – AI SEO Checker Starter

A comprehensive AI SEO analysis tool that performs 40+ checks to optimize your website for AI crawlers and Large Language Models (LLMs).

404 Notify vs GAISEO – AI SEO Checker Starter