Know when emails get read.
Know when services go down.

No. You can use email tracking, uptime monitoring, or both. Every plan includes access to both products — you only pay based on usage (tracked messages and monitors). If you only need one, ignore the other.

When you create a tracked message, MetricHQ generates a unique 1×1 transparent pixel URL. Embed it as an <img> tag in your email HTML. When the recipient opens the email and their client loads images, we record the open event with timestamp, location, and device info. The pixel is served in under 50ms.

HTTP(S) and gRPC health checks. For HTTP, you can configure the method, expected status codes, body substring matching, custom headers, and redirect following. For gRPC, you can specify TLS settings, service name, and metadata headers. Both types support configurable timeouts.

Yes. MetricHQ doesn't send emails — it tracks them. You continue using your current email infrastructure (SendGrid, Postmark, SES, SMTP, or any other provider). Just embed the tracking pixel and redirect links before sending.

Monitors run every 60 seconds. Incidents open after a configurable number of consecutive failures (default: 3), so the fastest detection is about 3 minutes. Alerts fire immediately when an incident opens and can re-notify at intervals you set while the incident stays open.

One API call to create a new message with a tracking pixel. Each unique email you track counts as one message. Opens, clicks, and other events are unlimited on all paid plans and don't count toward your message limit.

No. All data is isolated to your account with strict tenant separation. We don't sell or share data with third parties.