OpenRouter Outages on February 17 and 19, 2026

In February 2026, OpenRouter experienced two significant outages due to failures in a third-party caching dependency, affecting a portion of users with API endpoint errors and degraded chatroom functionality. The outages occurred on February 17th and 19th, with users encountering 500 and 401 errors due to the caching layer dropping all connections to OpenRouter's database, overwhelming it with lookup requests. Initially misattributed to a concurrent denial-of-service attack, the true cause was identified after the second incident. To prevent future occurrences, OpenRouter implemented circuit breaker mechanisms to manage cache failures and ensure accurate error codes, while the caching provider deployed fixes to address the failure mode. OpenRouter is committed to its promise of reliability by rolling out a fallback caching mechanism to enhance resilience against extended caching layer downtimes.

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