Guide
Alerts & notifications
Alert rules live per project (Settings → Alerts) and fire through email, Slack/Discord webhooks, signed generic webhooks, or in-app notifications.
Rule types
- New issue — fires once when a never-seen-before issue appears (and again if it regresses after being resolved).
- Frequency — fires when an issue exceeds N events within a window (debounced so it doesn't re-fire every event).
- Metric threshold — warning/critical thresholds over a custom metric window, with hysteresis auto-resolve.
- Anomaly — statistical spike detection against a 7-day hourly baseline (z-score, with a cold-start guard).
- Monitors alert through issues: a missed/errored cron or an uptime-down transition opens a Cron Monitor / Uptime issue, which triggers your new-issue rules — once per outage, auto-resolving on recovery.
Conditions & routing
Rules can be scoped by level and environment. Members can mute a project's emails for themselves (per-project notification setting) without affecting the team.
Webhook payloads are signed
POST <your url>
X-Jentry-Signature: sha256=<HMAC of the body with the rule's signing secret>
{ "rule": "crashes", "issue": { "id": 42, "title": "TypeError: …", "url": "https://…" }, … }Verify the HMAC before trusting a payload. Slack/Discord actions post ready-made messages to incoming-webhook URLs; deliveries are retried and never block ingestion.
Try jentry free
Hosted error tracking & performance monitoring. Works with your Sentry SDKs — send your first event in minutes.