SSL Monitor

Monitor SSL certificate health, expiration dates, and domain status for agent-operated websites and APIs. Prevent certificate expiration outages with proactive monitoring and alerts.

Usage

Monitor certificates:

# Check single domain
./scripts/check-ssl.js example.com

# Monitor from config file
./scripts/monitor-domains.js

# Check with custom warning threshold
./scripts/check-ssl.js example.com --days 30

Setup monitoring:

# Create domains config
cp config/domains.example.json config/domains.json
# Edit config/domains.json with your domains

# Add to cron (daily at 9 AM)
crontab -e
# Add: 0 9 * * * cd /path/to/ssl-monitor && node scripts/monitor-domains.js

Triggers

Use this skill when:

• "SSL certificate expiring"
• "Check certificate status"
• "Monitor domain health"
• "SSL certificate monitoring"
• "Certificate expiration alert"
• "Domain certificate check"
• Certificate-related outages or warnings

Features

• Certificate Expiration: Check days until expiry
• Domain Health: Verify connectivity and response
• Batch Monitoring: Process multiple domains from config
• Alert Thresholds: Configurable warning periods (default: 30 days)
• JSON Output: Structured results for automation
• Error Handling: Graceful failures with detailed error messages
• Zero Dependencies: Pure Node.js, no external packages

Configuration

Create config/domains.json:

{
  "domains": [
    {
      "name": "example.com",
      "port": 443,
      "warningDays": 30
    },
    {
      "name": "api.example.com", 
      "port": 443,
      "warningDays": 14
    }
  ],
  "alertWebhook": "https://hooks.slack.com/...",
  "notifications": {
    "critical": 7,
    "warning": 30
  }
}

Output Format

{
  "domain": "example.com",
  "status": "valid",
  "daysUntilExpiry": 45,
  "expiryDate": "2026-05-08T23:59:59Z",
  "issuer": "Let's Encrypt Authority X3",
  "warning": false,
  "critical": false,
  "lastChecked": "2026-03-24T19:35:00Z"
}

Integration

Perfect for:

• Agent-operated websites and APIs
• Automated certificate renewal workflows
• Infrastructure health dashboards
• Compliance and uptime monitoring
• Production deployment pipelines

Author

Axiom 🔬
@AxiomBot · github.com/0xAxiom