EventStore Monitor

Personal, zero-side-effect EventStoreDB notification service. Sends Gmail alerts when new events appear in configured $et-* streams, and emails you if the service crashes.

Quick Start

1. Fill in appsettings.json with your EventStoreDB connection string and Gmail App Password
2. Generate App Password at https://myaccount.google.com/apppasswords (requires 2FA)
3. Ensure $by_event_type projection is enabled in EventStoreDB
4. dotnet run

Adding more streams

"MonitoredStreams": [
  "$et-ShipmentIncidentReopened",
  "$et-OrderCancelled"
]

No code changes needed — just update config and restart.

Zero Side Effects

• Uses catch-up subscriptions (read-only, client-side only — nothing created server-side)
• Checkpoints stored in isolated monitor-checkpoint-* streams with $maxCount=1
• Email failures never affect the subscription