omnipress

SpamBlocker AI is a WordPress plugin that uses artificial intelligence to block spam in comments and forms (Contact Form 7, WPForms). It integrates with Gemini or OpenAI APIs for accurate spam detection, with a fallback mechanism for when APIs are unavailable. The plugin logs spam submissions for review, supports customizable error messages, and prioritizes privacy with GDPR-compliant options.
<h3>Third-party Services</h3>
This plugin integrates with third-party AI services for spam detection:
<ol>
<li>Google Gemini API</li>
</ol>
– Used for: Analyzing and detecting spam in form submissions and comments 
– When data is sent: When a form is submitted or a comment is posted 
– Data sent: The text content of the submission (no personal data unless included in the form) 
– Privacy Policy: https://policies.google.com/privacy 
– Terms of Service: https://cloud.google.com/gemini-ai/docs/terms-of-service
<ol>
<li>OpenAI API</li>
</ol>
– Used for: Analyzing and detecting spam in form submissions and comments 
– When data is sent: When a form is submitted or a comment is posted 
– Data sent: The text content of the submission (no personal data unless included in the form) 
– Privacy Policy: https://openai.com/privacy/ 
– Terms of Service: https://openai.com/api-terms/
The plugin includes privacy features: 
– Optional IP and user agent logging (can be disabled in settings) 
– 30-day auto-cleanup of spam logs 
– GDPR-compliant data handling 
– No tracking of users without explicit consent
<h3>Data Privacy</h3>
The plugin adheres to strict privacy standards: 
– No user tracking without consent 
– All data processing is optional and configurable 
– Data retention is limited to 30 days 
– Users can disable all logging features 
– No personal data is stored unless explicitly included in form submissions
Key Features: 
– AI-driven spam detection for comments and forms 
– Supports Contact Form 7 and WPForms 
– Configurable with Gemini or OpenAI APIs 
– Fallback spam check using keywords and patterns 
– Spam logging with 30-day auto-cleanup 
– Optional IP and user agent logging (GDPR-compliant) 
– Customizable spam error messages 
– Debug logging for troubleshooting 
– Response caching for performance 
– Dynamic model selection for AI providers 
– Enable/disable comment spam checking in Discussion settings
<h3>Requirements</h3>
<ul>
<li>WordPress 5.0+</li>
<li>PHP 7.4+</li>
<li>Gemini or OpenAI API key</li>
<li>SSL for secure API communication</li>
<li>Contact Form 7 or WPForms (optional for form protection)</li>
</ul>
<h3>Third Party Services</h3>
SpamBlocker AI uses third-party AI services for spam detection:
<ul>
<li>Google Gemini: Used when Gemini is selected as the AI provider. Requires a Google AI Studio API key.</li>
<li>OpenAI: Used when OpenAI is selected as the AI provider. Requires an OpenAI API key.</li>
</ul>
These services are used exclusively for spam detection and content analysis. They do not track or store user data. The plugin sends only the content being analyzed to these services, excluding: 
– IP addresses 
– User agents 
– Personal identifiers 
– Sensitive information
The plugin includes a fallback mechanism that uses local keyword and pattern matching when the AI services are unavailable.
<h3>Privacy Notice</h3>
SpamBlocker AI logs spam submissions (content, author, email) in the WordPress database for 30 days, with automatic deletion. The plugin does not track users without explicit consent.
Optional features: 
– IP and user agent logging (requires explicit admin consent) 
– Debug logging (requires explicit admin consent)
The plugin: 
– Does not collect or store personal data without consent 
– Automatically deletes spam logs after 30 days 
– Does not track user behavior or site visits 
– Does not share data with third parties except for spam detection purposes 
– Includes GDPR-compliant data handling options

SpamBlocker AI

Protect your WordPress site from spam comments and form submissions using AI-powered detection with Gemini or OpenAI.

Team beta version

Note: This plugin requires HTTPS to function (due to Web Crypto API usage).
The Story: The Forging of the Ultimate Defense
This project began with a simple goal: to create a lightweight honeypot trap to catch basic bots. But during development, we faced a harsh reality: Simple traps are obsolete. Modern AI bots and headless browsers can easily step over traditional defenses. A basic trap was no longer enough; we needed a fortress.
So, we forged a completely new architecture. We added Proof of Work, Behavioral Analysis, and Rate Limiting. What started as a simple honeypot evolved into a 15-layer invisible firewall. Like a samurai’s blade, it operates with absolute precision—completely invisible to your real customers, yet ruthlessly executing a “Silent Kill” on spam bots before they ever reach your inbox or database.
Samurai Honeypot protects every Contact Form 7 and WPForms form with fifteen independent defense layers. 
Each layer contributes a score, and blocked submissions are handled by a 3-Tier Triage System:
<h4>3-Tier Triage System</h4>
<ul>
<li>Tier 1 (Pass): Score below the threshold (default 50) — email is sent normally.</li>
<li>Tier 2 (Quarantine): Score between the threshold and 99 — email is silently suppressed (Silent Kill) and the submission is saved to the built-in Quarantine Log for admin review.</li>
<li>Tier 3 (Drop / Instant Kill): Score of 100 or higher — email is silently suppressed and the submission is permanently dropped without logging. This protects your database from bloat during DDoS or mass bot attacks.</li>
</ul>
Warning — False Positives: Depending on your environment, legitimate emails may occasionally be flagged as spam. Enterprise proxies, strict corporate firewalls, outdated browsers, VPNs, and unusual network configurations can trigger detection layers. You MUST check the Quarantine Log periodically to identify and recover any false positives. The plugin cannot distinguish all edge cases automatically.
<h4>Defense Layers</h4>
<ol>
<li>JS Injection Gate — Blocks bots that cannot execute JavaScript. Tokens are fetched via REST API for full page-cache compatibility.</li>
<li>Polymorphic Honeypot — Decoy field name is cryptographically derived per token (not exposed in the API response), hidden from humans via CSS.</li>
<li>Token Signature — HMAC-SHA256 signed stateless token with IP and Form ID binding.</li>
<li>Time Trap — Detects impossibly fast submissions. Browser autofill is automatically exempt.</li>
<li>Proof of Work — SHA-256 computational challenge via Web Crypto API that forces CPU cost on bots.</li>
<li>Behavioral Entropy — Hash-verified human-like event counters: mouse, keyboard, touch, scroll. Uniqueness tracking detects script reuse.</li>
<li>Headless UA Block — Server-side User-Agent check instantly blocks known headless browsers and automated tools (Headless Chrome, Puppeteer, PhantomJS, Selenium, Playwright, Nightmare, Electron). Toggleable in settings for E2E testing compatibility.</li>
<li>Headless Detection — Detects automated browser environments (navigator.webdriver, plugin count, window.chrome, language count).</li>
<li>UA Age Detection — Scores based on Chrome version age. 2+ years: +10, 3+ years: +20, 4+ years: +30. Bots often use hardcoded old User-Agent strings that never update.</li>
<li>Rate Limiting — Per-IP submission rate limiting with IPv6 /64 normalization.</li>
<li>Replay Protection — Atomic token consumption (INSERT IGNORE) + TTL expiry enforcement.</li>
<li>IP Blacklist — Manually configured IP/CIDR blacklist for known bad actors.</li>
<li>Content: URL Limit — Flags messages containing more URLs than the configured threshold.</li>
<li>Content: BBCode — Detects BBCode link syntax (<code>[url=...]</code>) that never appears in legitimate form submissions.</li>
<li>Content: Denylist — Matches against WordPress Disallowed Comment Keys (Settings > Discussion).</li>
</ol>
<h4>Key Features</h4>
<ul>
<li>3-Tier Triage — Pass, Quarantine (with local log), or Drop. No legitimate message is lost without a trace — quarantined submissions are saved for admin review.</li>
<li>Built-in Quarantine Log — Blocked Tier 2 submissions are saved to a local database table (up to 1,000 entries, FIFO). View date, score, trigger reasons, and full form data from the admin panel. No external plugin required.</li>
<li>DDoS-Resilient Tier 3 Drop — Submissions scoring 100+ are immediately dropped from memory without any database write. This prevents database exhaustion during mass bot attacks.</li>
<li>GDPR Compliant — No cookies, no external service calls, no plugin-specific PII stored. IP addresses are one-way hashed with a site-specific salt before any storage — raw IPs never touch the database. No consent banner required.</li>
<li>Stateless Tokens — No database writes for token generation; prevents DoS via DB bloat.</li>
<li>Zero Trust Client — All client-submitted data is verified server-side with HMAC signatures and hash integrity checks.</li>
<li>Zero Configuration — Activate and all Contact Form 7 / WPForms forms are protected automatically.</li>
<li>Cache Compatible — Tokens are fetched via REST API, so page caching works fine.</li>
<li>Multiple Forms — Works correctly with multiple forms on the same page.</li>
<li>IP Whitelist / Blacklist — Whitelist trusted IPs or CIDR ranges to skip all scoring. Blacklist known bad IPs to add +100 score instantly. Optionally whitelist all logged-in WordPress users.</li>
<li>Headless Browser Blocking — Server-side User-Agent check instantly blocks Headless Chrome, Puppeteer, Selenium, and other automated browsers (+100 score). Enabled by default; can be toggled off for E2E testing.</li>
<li>Content Rules — Detect spam patterns in form content: excessive URLs, BBCode link syntax, and WordPress Disallowed Comment Keys matching.</li>
<li>Trusted Proxy Support — Optional mode for Cloudflare and reverse proxy environments with IP range validation.</li>
<li>Lightweight — Three PHP files, no external dependencies, no jQuery.</li>
</ul>

Samurai Honeypot for Forms

Invisible 15-layer anti-spam for Contact Form 7 & WPForms. Score-based 3-Tier Triage silently blocks bots — no CAPTCHA, no user friction.

SpamBlocker AI vs Samurai Honeypot for Forms