Ssl Certcheck

Check SSL/TLS certificates for any hostname — expiry dates, issuer, SANs, protocol version, cipher suite. Use when asked to check if a certificate is valid, see when a cert expires, inspect TLS details, or audit HTTPS security. Alerts on expired or soon-to-expire certs. Zero dependencies — pure Python ssl/socket.

certcheck 🔒

SSL/TLS certificate inspector with expiry alerts.

Commands

# Check one or more hosts
python3 scripts/certcheck.py github.com google.com openclaw.ai

# JSON output for scripting
python3 scripts/certcheck.py --json example.com

# Custom expiry warning threshold (default 30 days)
python3 scripts/certcheck.py --days 60 mysite.com

# Custom port
python3 scripts/certcheck.py -p 8443 internal.example.com

Output

• ✅ Valid cert with >30 days remaining
• ⚠️ Cert expiring within threshold
• ❌ Expired or connection failed
• Shows: CN, issuer, expiry date + days left, TLS version, cipher, SANs

Exit Codes

• 0: All certs healthy
• 1: One or more expired/expiring (useful for cron monitoring)