Phish Radar - Phishing Detection & Brand Monitoring MCP Server

Real-time phishing detection and brand monitoring system for AI agents. Analyzes URLs and domains for phishing indicators, typosquatting, homoglyphs, and lookalike domains.

Features

1. Phishing Detection (phishing_detect)

Comprehensive URL/domain analysis with:

• Typosquatting detection - Identifies domains similar to known brands (Levenshtein distance)
• Homoglyph detection - Catches visually similar character substitutions (0/O, 1/l/I, etc.)
• Domain age analysis - Detects recently registered suspicious domains
• SSL certificate inspection - Flags free certificates (Let's Encrypt) when combined with brand similarity
• DNS records - Checks for MX, SPF, DKIM, DMARC records
• Hosting location - Identifies suspicious geography patterns

Score: 0-100 phishing confidence

• PHISHING (70+): Block immediately
• SUSPICIOUS (40-69): Review recommended
• SAFE (<40): Low risk

2. Domain Trust Score (domain_trust)

Evaluates domain trustworthiness (0-100) based on:

• Email infrastructure (MX, SPF, DKIM, DMARC) - 25 points
• SSL certificate type (EV > OV > DV) - 20 points
• TLD reputation - 20 points
• Nameserver reputation - 15 points
• DNS records - 5 points

Levels:

• HIGHLY_TRUSTED (80+): Enterprise-grade domain
• TRUSTED (60-79): Legitimate domain
• NEUTRAL (40-59): Unproven domain
• SUSPICIOUS (20-39): Warning signs present
• UNTRUSTED (<20): High-risk domain

3. Brand Monitor (brand_monitor)

Detects lookalike domains targeting your brand:

• Typosquats - Single character swaps/deletions (paypa1.com vs paypal.com)
• Homoglyphs - Visually confusing substitutions
• Keyword additions - Security-related additions (paypal-secure.com)
• TLD variations - Same domain on different extensions (paypal.xyz)

Returns high-risk domains that actually exist with full risk assessment.

Usage

Example 1: Check a Suspicious URL

{
  "toolName": "phishing_detect",
  "input": {
    "url": "https://paypa1-secure.com/login"
  }
}

Response:

{
  "url": "https://paypa1-secure.com/login",
  "domain": "paypa1-secure.com",
  "verdict": "PHISHING",
  "confidence": 0.97,
  "phishing_score": 94,
  "signals": {
    "typosquat_of": "paypal.com",
    "typosquat_distance": 1,
    "homoglyph_detected": true,
    "homoglyph_count": 1,
    "domain_age_days": 3,
    "ssl_issuer": "Let's Encrypt",
    "ssl_free_cert": true,
    "has_mx_records": false,
    "suspicious_tld": false,
    "dns_a_records": ["185.234.xx.xx"],
    "hosting_country": "RU"
  },
  "action": "BLOCK",
  "details": "High-confidence phishing domain detected (score: 94). Domain is a typosquat of paypal.com (distance: 1). Contains 1 homoglyph character substitution. Uses free SSL certificate (Let's Encrypt) - commonly abused. No MX records configured - not set up for legitimate email."
}

Example 2: Check Domain Trust

{
  "toolName": "domain_trust",
  "input": {
    "domain": "stripe.com"
  }
}

Response:

{
  "domain": "stripe.com",
  "trust_score": 92,
  "trust_level": "HIGHLY_TRUSTED",
  "factors": {
    "domain_age_days": null,
    "has_mx": true,
    "has_spf": true,
    "has_dkim": true,
    "has_dmarc": true,
    "ssl_type": "EV",
    "ssl_issuer": "DigiCert",
    "has_ssl": true,
    "tld_risk": "LOW",
    "nameservers": ["ns1.stripe.com", "ns2.stripe.com"],
    "a_records_count": 4
  }
}

Example 3: Monitor Brand Lookalikes

{
  "toolName": "brand_monitor",
  "input": {
    "brand_domain": "stripe.com",
    "limit": 10
  }
}

Response:

{
  "brand": "stripe.com",
  "brand_name": "stripe",
  "lookalikes_found": 8,
  "domains": [
    {
      "domain": "str1pe.com",
      "exists": true,
      "risk": "HIGH",
      "type": "homoglyph",
      "tld_risk": "LOW"
    },
    {
      "domain": "stripe-secure.com",
      "exists": true,
      "risk": "HIGH",
      "type": "keyword_addition",
      "tld_risk": "LOW"
    },
    {
      "domain": "stripee.com",
      "exists": true,
      "risk": "MEDIUM",
      "type": "insertion",
      "tld_risk": "LOW"
    }
  ],
  "analysis_time_ms": 2847
}

Implementation Details

No External API Dependencies

• DNS Queries: Native Node.js dns/promises module
• SSL Certificates: Node.js tls module for direct connections
• WHOIS: Direct TCP port 43 protocol (future enhancement)
• GeoIP: Simplified IP-to-country mapping (for production, integrate MaxMind)

Known Brands Database

Includes 80+ major brands across:

• Financial Services (PayPal, Stripe, Square, etc.)
• Tech Companies (Apple, Google, Microsoft, etc.)
• Cryptocurrency (Coinbase, Kraken, Binance, etc.)
• Cloud Providers (AWS, Azure, Google Cloud, etc.)
• E-commerce (Amazon, eBay, Shopify, etc.)

Easily extensible in src/data/known_brands.js.

Suspicious TLDs

Monitors 40+ high-risk TLDs commonly used in phishing:

• Cheap registration TLDs: .xyz, .top, .click, .bid
• Free TLDs: .tk, .ml, .ga, .cf
• Cryptocurrency scams: .btc, .eth, .crypto
• Sanctioned regions: .ru, .ir, .kp

Phishing Score Calculation

High-Risk Signals (Add Points)

• Typosquat distance 1: +35 points
• Typosquat distance 2: +25 points
• Homoglyph detected: +20 points
• Suspicious TLD: +15 points
• Free SSL + typosquat: +15 points
• No MX + typosquat: +10 points
• Hosting in RU + typosquat: +10 points

Low-Risk Signals (Subtract Points)

• Has MX records: -5 points
• Trusted CA cert: -5 points

Final Score Clamped: 0-100

Confidence Levels

• 70+ (PHISHING): 0.70-0.99 confidence → BLOCK
• 40-69 (SUSPICIOUS): 0.50-0.95 confidence → REVIEW
• <40 (SAFE): 0.95+ confidence → ALLOW

Pricing

• $0.05 per tool call (per domain/URL analyzed)
• Bulk monitoring: $0.05 × number of domains checked

Example: Monitoring 100 brand lookalikes = $5.00 per execution

Implementation Notes

Security Considerations

• No WHOIS PII collection: Personal information (owner names, emails) excluded per GDPR
• No certificate validation bypass: Uses system trust stores
• Rate limiting: Implement externally to avoid DNS query floods
• Timeout protection: 5-second SSL connection timeout

Performance

• Parallel DNS queries for speed
• Batch processing for large domain lists (10 concurrent)
• Caching at application level (not in Actor)

Future Enhancements

1. WHOIS Integration: For domain registration date analysis
2. GeoIP Database: MaxMind for accurate IP location
3. SSL Certificate History: Certificate Transparency logs
4. Reputation Scoring: Integration with Phishing/Malware databases
5. Machine Learning: Pattern recognition for new phishing techniques

API Signature

All tools follow MCP standard with JSON input/output.

Tool Request Format

{
  "toolName": "phishing_detect|domain_trust|brand_monitor",
  "input": {
    // tool-specific inputs
  }
}

Error Response

{
  "error": "Error description",
  "tool": "tool_name"
}

Testing

# Local testing
npm install
node src/main.js

# With Apify SDK (when deployed)
apify call phish-radar --input input.json

Maintenance

• Update known_brands.js quarterly with emerging platforms
• Monitor suspicious_tlds.js for new high-abuse extensions
• Review phishing signal weights annually based on threat patterns

Support

For brand additions or TLD updates, modify:

• Brand list: src/data/known_brands.js
• TLD list: src/data/suspicious_tlds.js

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Version: 1.0 Node.js: 18+ License: Private (ntriq)

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Disclaimer

RISK ASSESSMENT DISCLAIMER: This tool provides data-driven risk analysis based on publicly available and curated sources. Assessments are indicative only and NOT professional risk management advice. You must engage qualified professionals (risk managers, insurance brokers, compliance officers) to validate findings before making investment or operational decisions. Risk scores do not constitute investment advice or due diligence completion. We assume no liability for business decisions based on this tool's output.