- Sources: GitHub status incident
- Summary: GitHub reported REST API degradation from 22:21 UTC to 23:50 UTC on 2026-07-16. About 39% of REST API requests failed with HTTP 500-level responses, peaking at 44.3%. GitHub attributed the incident to an infrastructure change that wrongly marked most API backends in a single region as unhealthy, so requests failed before reaching the application layer.
- Why it matters: REST API failures at that rate break CI, automation, and tooling that depend on the GitHub API, independent of the web UI.
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