---
title: Add Alerts derived rate metrics for Compute responses
summary: null
url: >-
  https://www.fastly.com/documentation/reference/changes/2026/02/add-alerts-compute-derived-rate-metrics
---

The [Alerts API](https://www.fastly.com/documentation/reference/api/observability/alerts/) now supports derived rate metrics for Compute response status codes when using Domain Inspector as a source. The following new metrics are available: `compute_resp_status_5xx_rate`, `compute_resp_status_4xx_rate`, `compute_resp_status_gte_400_rate`, `compute_resp_status_lt_500_rate`, `compute_resp_status_4xx_excl_404_rate`, and `compute_resp_status_404_rate`.