---
title: >-
  Monitor a stat across all or a set of services individually using a single
  alert definition
summary: null
url: >-
  https://www.fastly.com/documentation/reference/changes/2026/10/multi-service-alerts
---

You can now monitor multiple services with a single alert definition using the [Alerts API](https://www.fastly.com/documentation/reference/api/observability/alerts/definition). When creating alerts for `stats` metrics, set `service_id` to an empty string and specify target services in the `dimensions.services` array to receive alerts for each service (not aggregated). Use an empty sequence to monitor all services, or specify up to 10 service IDs to monitor specific services. Alert history now includes a `service_id` field to identify which service triggered each event.