ssl-certificate-monitor

What This Skill Does

The ssl-certificate-monitor is a powerful CLI-driven agent skill designed to provide comprehensive oversight of SSL/TLS certificate health. By leveraging Python's native SSL libraries, it performs real-time checks on domains to extract expiration dates, issuer metadata, signature algorithms, and subject details. Unlike web-based dashboard monitors, this tool provides local, transparent, and immediate verification of your cryptographic assets without relying on external SaaS APIs. It is highly configurable, allowing for custom warning thresholds, batch processing from text files, and machine-readable JSON output suitable for integration into sophisticated CI/CD pipelines or automated monitoring dashboards.

Installation

To integrate this skill into your environment, use the OpenClaw CLI tool. Run the following command in your terminal:

clawhub install openclaw/skills/skills/derick001/ssl-certificate-monitor

Ensure that you have Python 3 installed on your host system as the tool relies on standard library network modules for certificate handshakes.

Use Cases

• DevOps Observability: Automate expiration alerts in your monitoring stack by piping the JSON output into your alerting framework.
• Security Audits: Perform mass validation across a portfolio of domains to ensure all certificates meet organizational standards for signature algorithms and chain trust.
• Compliance Reporting: Generate structured data for internal compliance reviews, proving that all production domains are properly encrypted.
• Proactive Maintenance: Receive early warnings for domains approaching their expiration dates to prevent downtime due to expired handshake handoffs.

Example Prompts

1. "Check the SSL certificate status for google.com and tell me when it expires."
2. "Monitor all domains listed in domains.txt and alert me if any certificates expire in the next 14 days."
3. "Run a full security validation and detail report for my domain example.com and output the result in JSON format."

Tips & Limitations

• Permissions: This tool performs network requests to external endpoints. Ensure your firewall policies allow outbound connections on port 443 (or your custom port).
• Network Latency: While lightweight, checking a large file of domains via batch processing may take time depending on your local network speed and the target servers' response times.
• Accuracy: It checks the certificate currently presented by the server; it does not verify DNS-based certificate records directly.
• Automation: Use this with cron jobs to build a simple, cost-effective heart-beat monitor for your infrastructure.