Anthropic authentication issue took Claude services down for about 36 minutes

Sources: Anthropic status, HN discussion
Summary: Anthropic reported an issue with users authenticating on 2026-08-16 from 21:58 to 22:34 UTC, about 36 minutes. The status updates name claude.ai, platform.claude.com, the Claude API, Claude Code, and Claude Cowork. Anthropic deployed a fix and marked the issue resolved, and the status page states no cause.
Why it matters: Every named Claude surface failed together, so teams routing agent work through Anthropic had no fallback within the vendor.