Is Crossref down?

Last checked 6m ago
Current status
Crossref is up

No incidents right now.

Official status page: https://status.crossref.org · Polled every 5 minutes · 31 components tracked

Crossref is operational right now. Last checked 6m ago; the most recent incident resolved 3d ago.

Real-time Crossref status, recent outages, and incident history — pulled directly from Crossref's official status page at https://status.crossref.org every 5 minutes. Pingoru tracks 31 Crossref services and has captured 27 incidents in the last 90 days (99.17% uptime). Get email, Slack, Discord, or webhook alerts the moment Crossref reports a new incident — free for 3 monitors, no credit card.

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Crossref uptime 99.17% uptime · past 90 days
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Recent outages & incidents

Past 90 days
  1. Resolved 4h 3m
    Started Oct 05, 2026, 12:21 PM UTC · Resolved Oct 05, 2026, 04:25 PM UTC
    Plus REST API
    Timeline · 5 updates
    • investigating · Oct 05, 2026, 12:21 PM UTC

      Request to the Metadata Plus pool of the REST API are receiving 401 responses (access denied). We are investigating the cause.

    • investigating · Oct 05, 2026, 12:41 PM UTC

      The API is back up but we are still investigating and monitoring.

    • investigating · Oct 05, 2026, 12:49 PM UTC

      We are continuing the investigate the outage. The Plus pool was down between 12:00 and 12:36 on 5 Oct, 2026.

    • monitoring · Oct 05, 2026, 01:01 PM UTC

      A fix has been implemented and we are continuing to monitor the performance of the Metadata Plus pool.

    • resolved · Oct 05, 2026, 04:25 PM UTC

      We have identified the problem due to a bug in a deployment. The deployment was reversed and the Plus pool of the API is working normally again.

    Latest: We have identified the problem due to a bug in a deployment. The deployment was reversed and the Plus pool of the API is working normally again.

  2. Resolved 1d 1h
    Started Oct 04, 2026, 11:30 AM UTC · Resolved Oct 05, 2026, 12:49 PM UTC
    Test admin tool
    Timeline · 4 updates
    • investigating · Oct 04, 2026, 11:30 AM UTC

      The test admin system has been down since about 09:30 UTC, so members will see a 503 Service Unavailable message when visiting test.crossref.org. We're investigating. -GH

    • monitoring · Oct 04, 2026, 01:18 PM UTC

      The test server ran out of memory and stopped responding; we restarted it, and it's working again. If you had problems depositing or querying in the test system during this time, please try again. We'll monitor. -GH

    • monitoring · Oct 04, 2026, 01:18 PM UTC

      We are continuing to monitor for any further issues.

    • resolved · Oct 05, 2026, 12:49 PM UTC

      This incident has been resolved.

    Latest: This incident has been resolved.

  3. Resolved 23m
    Started Sep 27, 2026, 01:22 AM UTC · Resolved Sep 27, 2026, 01:45 AM UTC
    Test admin tool
    Timeline · 3 updates
    • investigating · Sep 27, 2026, 01:22 AM UTC

      Our test admin tool is down at the moment. Members are receiving a 503 service unavailable message when trying to access test.crossref.org. -IF

    • monitoring · Sep 27, 2026, 01:38 AM UTC

      A fix has been implemented and we are monitoring the results.

    • resolved · Sep 27, 2026, 01:45 AM UTC

      This incident has been resolved.

    Latest: This incident has been resolved.

  4. Resolved 6h 20m
    Started Sep 21, 2026, 02:57 AM UTC · Resolved Sep 21, 2026, 09:18 AM UTC
    Test admin tool
    Timeline · 2 updates
    • investigating · Sep 21, 2026, 02:57 AM UTC

      Members attempting to access the test admin tool - test.crossref.org - are experiencing the following error: 'Error connecting to the authentication service. Please try again later or contact support.' Our technical team will investigate on Monday. -IF

    • resolved · Sep 21, 2026, 09:18 AM UTC

      This incident has been resolved. Members can now log in to our test admin tool - test.crossref.org - as normal. Between approximately 21:30 UTC on 20 September and 08:30 UTC on 21 September, members attempting to log in saw the error "Error connecting to the authentication service." Our technical team restored the service and confirmed that login is working again.

    Latest: This incident has been resolved. Members can now log in to our test admin tool - test.crossref.org - as normal. Between approximately 21:30 UTC on 20 September and 08:30 UTC on 21 …

  5. Resolved 9d 14h
    Started Sep 14, 2026, 11:19 PM UTC · Resolved Sep 24, 2026, 01:22 PM UTC
    Crossref website
    Timeline · 4 updates
    • monitoring · Sep 14, 2026, 11:19 PM UTC

      Yesterday, 13 September, we reported an incident with our website: www.crossref.org. It was down from from 11:13 to 12:23 UTC. We resolved that incident prematurely. The outage was caused by a know intermittent issue that our technical team is working to resolve, but does not yet have fixed. We're monitoring the issue, and anticipate doing so for the foreseeable future. Thus, we have re-opened a new incident here. We'll provide updates as we have them. -IF

    • monitoring · Sep 15, 2026, 05:01 PM UTC

      We have deployed a fix for this issue and are monitoring the results. -IF

    • monitoring · Sep 21, 2026, 10:12 PM UTC

      We are continuing to monitor for any further issues.

    • resolved · Sep 24, 2026, 01:22 PM UTC

      This incident has been resolved.

    Latest: This incident has been resolved.

See the full Crossref outage history

7 more incidents in the last 90 days, plus the full multi-year archive of per-service events and update timelines.

Browse Crossref outage history →

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Outage history

Past 90 days · 12 incidents View full outage history →