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Last updated
August 8, 2026
SaaSWordPress IntegrationSMBSubscriptionFreemium
SentWatch is a monitoring service by PianoWeb that helps WordPress site owners catch silent email failures before they cause missed leads, failed password resets, or broken order confirmations. After installing the free SentWatch WordPress plugin and entering an API key generated from the SentWatch dashboard (panel.sentwatch.com), the plugin sends periodic 'heartbeat' signals -- via an HTTP API with an email fallback -- to SentWatch's servers. If those heartbeats stop arriving on schedule, SentWatch triggers an instant notification so the owner knows outgoing email has broken, often before a customer notices. The service automatically synchronizes with server time to prevent false alarms and needs no ongoing configuration beyond the initial API key setup.
Key Features
Hybrid Heartbeat Monitoring — Combines an HTTP API heartbeat with an email fallback to detect when a WordPress site stops sending outgoing email.
Instant Failure Notifications — Sends an immediate alert the moment a monitored sites heartbeat signal is missed.
Automatic Time Synchronization — Synchronizes with server time to prevent false alarms caused by clock drift.
Zero-Configuration Setup — Activates with a single API key entered in the WordPress plugin settings, with no SMTP credentials to configure.
Smart Heartbeat Scheduling — Automatically calibrates heartbeat check intervals by plan, from 24-hour checks on the free tier to 3-hour checks on Platinum.
Multi-Site Monitoring — Paid plans scale from 10 sites (Silver) up to 200 sites (Platinum) under a single account.
Pros & Cons
Pros
Purpose-built for a common, easy-to-miss failure mode: WordPress sites that silently stop sending email.
Zero-configuration setup -- only an API key is required, no SMTP credentials to manage in the plugin.
Free tier available at no cost to start monitoring one site.
Hybrid heartbeat system (HTTP API plus email fallback) reduces the chance of a missed alert from a single failure point.
Cons
Free plan covers only one site and checks just once every 24 hours, which may be too infrequent for time-sensitive alerts.
Only monitors WordPress email delivery, not general server/site uptime or other platforms.
Faster check intervals and multi-site coverage require upgrading to a paid Silver, Gold, or Platinum plan.