Monitoring many WordPress sites without alert fatigue

Monitoring a fleet of WordPress sites is harder than managing one, since updates lag, hosts fail intermittently, and noisy alerts lead teams to mute them. A homepage returning 200 OK does not reveal vulnerable plugins, outdated PHP, expiring TLS certificates, or unauthorized administrator accounts. The approach described combines external uptime checks with an installed agent that reports site data, and automatically matches plugins against vulnerability information. Because shared hosting often blocks or caches incoming requests, the panel pulls data through several fallback routes rather than relying on heartbeats, and each request is authenticated with HMAC-SHA256 signatures, timestamps, and nonces to prevent tampering and replay.