# Lambda error alerts in Slack, and a weekly digest

Ivy alerts you about Lambda errors in two ways. A **Slack message per error group** when an error is first seen, and again at most every 60 minutes or every 100 occurrences by default. And a **weekly email digest** per workspace with new errors, the top error groups and their trend, and totals of failures and throttles. Alerts are included in every plan.

## Slack alerts per error group

- **Add to Slack** and pick the channel. Each alert describes the error group (the function and its error) with a **View in Ivy** link.
- **First seen, then throttled.** The first occurrence of a new error group sends a message right away. After that, the same group posts again at most every **60 minutes** or every **100 occurrences**, whichever comes first. Both thresholds can be changed per project.
- **No payloads in Slack.** Messages carry the error, not your request or response bodies. The data stays in Ivy.
- **Covers failures outside the handler:** init errors, out-of-memory kills, crashes and timeouts alert like any handler error. Throttle alerts are optional.

## Weekly email digest

Once a week, each workspace member gets a summary:

- new error groups that week;
- the top error groups, with their trend against the week before;
- totals of failures and throttles.

Members can opt out of the digest.

## Self-hosted

On a self-hosted install, Slack and email are turned on with environment variables. A Slack app manifest is included, so creating your own Slack app takes a minute, and email goes through your SMTP server. For anything else, the `on-error-group-created` [hook](https://github.com/ivytrace/ivy) runs your own script when a new error group appears, for example to open an issue in your tracker. See [setting up alerts](https://ivytrace.dev/docs/alerts).

## What alerts don't do (yet)

Alerts are deliberately simple. Ivy does not have:

- metric, latency or cost alerts;
- custom alert rules beyond the per-project thresholds above;
- paging integrations such as PagerDuty or Opsgenie.

If you need those today, pair Ivy with CloudWatch alarms, or use the `on-error-group-created` hook on a self-hosted install.

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Source: https://ivytrace.dev/features/alerts · Updated 2026-11-14