Crossref Outage History

70 incidents recorded over the last 365 days, 38 of them resolved. Durations are measured from when PulsAPI first saw the problem to when it cleared, which is usually longer than the vendor's own figure.

Live Crossref status100.00% uptime history

Every Recorded Crossref Incident

Crossref incidents, newest first, with date, duration and status.
DateIncidentDurationStatus
Nov 3, 20263 November - weekly maintenance, release v0.297.0Scheduled maintenance is currently in progress. We will provide updates as necessary.2h 0mScheduled
Oct 27, 202627 October - weekly maintenance, release v0.296.0Scheduled maintenance is currently in progress. We will provide updates as necessary.2h 0mScheduled
Oct 21, 2026New funder matches not available via the Metadata Plus REST API poolThis incident has been resolved.181h 8mResolved
Oct 20, 202620 October - weekly maintenance, release v0.295.0The scheduled maintenance has been completed.2h 0mScheduled
Oct 16, 2026Content Registration Outage and InstabilityThis incident has been resolved.70h 45mResolved
Oct 13, 202613 October - weekly maintenance, release v0.294.0The scheduled maintenance has been completed.2h 0mScheduled
Oct 6, 20266 October - weekly maintenance, release v0.293.0The scheduled maintenance has been completed.2h 0mScheduled
Oct 5, 2026Metadata Plus REST API not validating API keysWe 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.4h 3mResolved
Oct 4, 2026test.crossref.org is currently being monitoredThis incident has been resolved.25h 19mResolved
Sep 29, 202629 September - weekly maintenance, release v0.292.0The scheduled maintenance has been completed.2h 0mScheduled
Sep 27, 2026Test admin tool - test.crossref.org - is downThis incident has been resolved.23 minResolved
Sep 22, 202622 September - weekly maintenance, release v0.291.0The scheduled maintenance has been completed.2h 0mScheduled
Sep 21, 2026Errors logging in to the test admin tool - test.crossref.orgThis 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…6h 20mResolved
Sep 15, 202615 September - weekly maintenance, release v0.290.0The scheduled maintenance has been completed.2h 0mScheduled
Sep 14, 2026www.crossref.org was down for 70 mins on Sunday, 13 September; we're monitoring for the coming weeksThis incident has been resolved.230h 2mResolved
Sep 13, 2026www.crossref.org was down for 70 minsThis incident has been resolved.22h 6mResolved
Sep 9, 2026Content registration processing delays todayThis incident has been resolved.4h 12mResolved
Sep 8, 20268 September - weekly maintenance, release v0.289.0The scheduled maintenance has been completed.2h 0mScheduled
Sep 7, 2026Several members reporting errors when attempting to log in to register records (Admin tool, Metadata Manager, web deposit form, OJS)Several members reported errors authenticating and logging in to doi.crossref.org, Metadata Manager, web deposit form, OJS, and third-party tools due to an error in our system. That error began around 2000 UTC today…0 minResolved
Sep 1, 20261 September - weekly maintenance, release v0.288.0The scheduled maintenance has been completed.2h 0mScheduled
Aug 25, 202625 August - weekly maintenance, release v0.287.0The scheduled maintenance has been completed.2h 0mScheduled
Aug 24, 202624 August - REST API planned maintenanceThe scheduled maintenance has been completed.2h 0mScheduled
Aug 20, 2026Crossref Metadata Search - search.crossref.org - Outage (504 gateway timeout)This incident has been resolved.23h 16mResolved
Aug 18, 202618 August - weekly maintenance, release v0.286.1The scheduled maintenance has been completed.2h 0mScheduled
Aug 11, 202611 August - weekly maintenance, release v0.286.1The scheduled maintenance has been completed.2h 0mScheduled
Aug 9, 2026Admin tool - doi.crossref.org - returning a 503 status codeThis incident has been resolved. Our admin tool was down for approximately 140 minutes. We are now accepting and processing all submissions. -IF47 minResolved
Aug 4, 202604 August - weekly maintenance, release v0.286.1The scheduled maintenance has been completed.2h 0mScheduled
Jul 28, 202628 July - weekly maintenance, release v0.285.0The scheduled maintenance has been completed.2h 0mScheduled
Jul 21, 202621 July - weekly maintenance, release version v0.285.0The scheduled maintenance has been completed.2h 0mScheduled
Jul 16, 202616 July - unscheduled maintenance, release version v0.284.1The scheduled maintenance has been completed.2h 0mScheduled
Jul 14, 202614 July - weekly maintenance, release version v0.284.0The scheduled maintenance has been completed.2h 0mScheduled
Jul 14, 2026Login issues affecting Crossref servicesWe have identified and fixed the issue affecting user logins. This incident is now resolved.39 minResolved
Jul 13, 2026Main website down between 07:40 UTC and 08:13 UTCThe main Crossref website (www.crossref.org) has been down since 07:40 - 08:13 UTC. The website is available again.0 minResolved
Jul 8, 2026Unplanned maintenance tomorrow, 8 July on our REST API - api.crossref.orgThe scheduled maintenance has been completed.4h 0mScheduled
Jul 7, 20267 July - weekly maintenance, release version v0.283.0The scheduled maintenance has been completed.2h 0mScheduled
Jul 7, 2026Degraded performance in the REST API public and polite poolsThis incident has been resolved.23h 8mResolved
Jul 2, 2026Cursor requests not returning all results in the REST APIThis incident has been resolved and our REST API is operating normally.93h 6mResolved
Jul 2, 20262 July - weekly maintenance, release version v0.282.0The scheduled maintenance has been completed.3h 0mScheduled
Jul 1, 20261 July - weekly maintenance [test admin tool - test.crossref.org]The scheduled maintenance has been completed.2h 0mScheduled
Jun 30, 202630 June - weekly maintenance, release version v0.282.0The scheduled maintenance has been completed.3h 0mScheduled
Jun 23, 202623 June - weekly maintenance, release version v0.281.0The scheduled maintenance has been completed.2h 0mScheduled
Jun 22, 2026Degraded performance on Public and Polite REST APIThis incident has been resolved.47h 23mResolved
Jun 16, 202616 June - weekly maintenance, release version v0.280.0The scheduled maintenance has been completed.2h 0mScheduled
Jun 16, 2026Investigating an outageParticipation Reports, the web deposit form, and other small apps and reports have been fully operational again since about 08.30am UTC.3h 44mResolved
Jun 10, 2026DOI Error Reports (Non-registered DOIs reported by end users for prefix…) were not sent between May 11th and June 10th 2026Due to a configuration change, we stored, but did not send out, DOI Error Reports starting on May 11th 2026. The problem was reported, identified, and a fix was implemented, on June 10th 2026. All DOI Error Reports…-44065 minResolved
Jun 9, 20269 June - weekly maintenance, release version v0.279.0The scheduled maintenance has been completed.2h 0mScheduled
Jun 2, 20262 June - weekly maintenance, release version v0.278.0The scheduled maintenance has been completed.2h 0mScheduled
May 29, 2026Degraded service on REST APIThis incident has been resolved.173h 38mResolved
May 19, 202619 May - weekly maintenance, release version v0.276.0The scheduled maintenance has been completed.2h 0mScheduled
May 14, 2026Test admin tool - test.crossref.org - returning 503 status code errors after today's deploymentThis incident has been resolved.2h 7mResolved
May 14, 202614 May - weekly maintenance, release version v0.275.0The scheduled maintenance has been completed.2h 0mScheduled
May 12, 202612 May - weekly maintenance, release version v0.274.2The scheduled maintenance has been completed.2h 0mScheduled
May 8, 2026Bug identified, possibly resulting in failed submissions. Emergency maintenance scheduled.This incident has been resolved and the emergency maintenance has been completed.2h 38mResolved
May 5, 202605 May - weekly maintenance, release version 0.274.0The scheduled maintenance has been completed.2h 0mScheduled
May 4, 2026April 2026 JSON Snapshot is missing data for records created or updated on 4/29 and 4/30The corrected April 2026 JSON snapshot has been released.70h 49mResolved
May 3, 2026Submission processing delayed on Sunday, 3 MaySubmission processing within our admin tool - doi.crossref.org - stalled and was therefore delayed between 10:56 and 20:57 UTC Sunday, 3 May. This issue has been fixed and submissions are again being processed. No…-754 minResolved
May 2, 2026REST API Indexing Stalled since April 29th. Impacts on downstream services.This issue has been resolved. Missed records have been indexed, and indexing of newly created and updated records has resumed.68h 1mResolved
Apr 21, 202631 March - test system - test.crossref.org - migration resulted in some members temporarily losing access and test notification callbacks being misroutedOn 31 March, we migrated our test system - test.crossref.org - and brought it into sync with our production admin tool - doi.crossref.org. As a result of that migration, access to some of the test accounts was…-30259 minResolved
Apr 17, 2026Main website down between 05:46 UTC and 06:47 UTCFrom 05:46 UTC on 17 April we experienced a sustained surge of traffic to our website, which was caused by bot activity distributed across multiple IP addresses. The service recovered automatically without intervention…3h 51mResolved
Apr 3, 2026Depositor reports returning gateway timeout errorsThis incident has been resolved.6 minResolved
Mar 30, 2026Failures downloading the 2026 public data file via Academic TorrentsThe 2026 public data file was stalling during download via Academic Torrents (https://academictorrents.com/details/b5ee0e102689b3e67023dd024694c0f5f124646f) for the last few days due to an issue with the number of…0 minResolved
Mar 24, 2026Crossref Resolution Reports unavailableResolution reports were unavailable from around 02:28 UTC to 09:42 UTC, due to the server running out of memory. We have rebooted the server and the service is now available again.1h 8mResolved
Mar 17, 2026Crossref DOIs not resolving/ DOI registration failingThis incident has been resolved. All affected metadata submissions have now been reprocessed.12h 6mResolved
Feb 26, 2026Website down for ≈ 20 minutes, on 25-02-2026Yesterday, we experienced a brief website (www.crossref.org) downtime from 10:05 UTC to 10:24 UTC. This issue was resolved, and a temporary fix was implemented to prevent such spontaneous disruptions while we work on a…-1514 minResolved
Dec 16, 2025Members reporting errors when attempting to update records using the new Metadata ManagerThis incident has been resolved.572h 27mResolved
Dec 16, 2025Degraded performance in our test admin tool - test.crossref.orgThis incident has been resolved.3h 23mResolved
Dec 16, 2025Crossref Participation Reports unavailable for several hours due to server problemOur Participation Reports were unavailable from 02:24 UTC until 10:10 UTC due to a problem with their server. Our team has now increased the size of this server and enabled the report to run across more servers…-518 minResolved
Dec 11, 2025Login Issues with iThenticate accounts/Similarity CheckThis incident has now been resolved by Turnitin. - KL44 minResolved
Dec 2, 2025Dropped sessions when adding contributors to Metadata Manager registrationsWe have deprecated - https://www.crossref.org/deprecated/ - our previous Metadata Manager tool. Members who previously made use of Metadata Manager to register their metadata should move to our new form -…743h 12mResolved
Nov 18, 2025Cloudflare network problems affecting DOI.org resolutionCNRI has written a postmorterm about how they handled the Cloudflare outage for doi.org: [https://doi.statuspage.io/incidents/z0rwt8tqcfsm](https://doi.statuspage.io/incidents/z0rwt8tqcfsm)7h 10mResolved

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How to Read This Crossref Incident Log

Each row is an incident PulsAPI observed, not a summary written afterwards. The duration is wall-clock time between the first failing check and the first clean one, so it includes the window before Crossref acknowledged anything. Vendor post-mortems typically measure from acknowledgement, which is why their numbers are usually shorter.

Incidents still open have no duration yet and are listed as ongoing rather than being given a running total. The archive covers the last 365 days; anything older has aged out of the window rather than never having happened.

The longest single Crossref outage in this window ran 30d 23h, against a mean recovery of 1d 13h. If you depend on Crossref in a customer-facing path, the longest figure is the one to design around. The mean is what happens on a normal bad day; the maximum is what happens on the worst one.