Crossref: test.crossref.org is currently down

Crossref · crossref.orgImpact: criticalmonitoring2026-10-04 13:18 UTC

Public — what happened

Summary

Crossref reported on October 4, 2026 that its test administration system at test.crossref.org was unavailable, rating the issue as critical. The company said the outage began around 09:30 UTC and that members trying to reach the site would get a 503 Service Unavailable error. As of its 11:30 UTC update, Crossref said it was still looking into the problem, had not named a cause, and had not reported a fix.

Timeline

Started — 2026-10-04 11:30 UTC
Last update — 2026-10-04 13:18 UTC
Ongoing at last check.

Source of record: provider status page. Summary written by SquidGrid from the provider’s published updates; times in UTC.

With SquidGrid — where it starts on the route

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Related: Crossref status & history. SquidGrid is not affiliated with Crossref.