Crossref Outage History
Uptime record, past incidents, and downtime history for Crossref.
Checking current status...
90-Day Trend
Monthly Uptime
| Month | Uptime | Days Tracked | Days with Issues |
|---|---|---|---|
| May 2026 | 33.3% | 12 | 8 |
| April 2026 | 83.3% | 30 | 5 |
| March 2026 | 75% | 4 | 1 |
Uptime is calculated from daily worst-status snapshots. A day with any non-operational status counts as a day with issues.
Daily Status (Last 46 Days)
Mar 28
Today
Operational
Degraded
Partial Outage
Major Outage
Maintenance
No Data
Incident History
May 2026
Bug identified, possibly resulting in failed submissions. Emergency maintenance scheduled.
Started: May 8, 4:59 PM
monitoring
Emergency release version 0.274.2 has been released. We are monitoring the results.
May 8, 7:04 PM
identified
The issue has been identified and a fix is being implemented.
May 8, 7:01 PM
investigating
We are continuing to investigate this issue.
May 8, 6:39 PM
investigating
We have identified a bug in our system which may result in failing submissions at this time. An emergency release is scheduled for approximately 1900 UTC with a fix.
During the release, our members may experience delays in deposit system admin tool (doi.crossref.org) processing. Deposits submitted during that time will be stored and processed after the maintenance has been completed.
May 8, 4:59 PM
April 2026 JSON Snapshot is missing data for records created or updated on 4/29 and 4/30
Started: May 4, 1:45 PM
identified
The corrected JSON snapshot is in process. It will be completed and available in the next 2-3 days.
May 5, 12:38 PM
identified
Due to problems with API indexing that occurred between 4/29 and 5/3, the current JSON snapshot for April 2026 is missing 1-2 days of data. We've resolved the indexing issue and are currently re-pushing the missing records into the API. Once that's completed, over the next few days, we'll build and release a new snapshot for April.
May 4, 1:45 PM
REST API Indexing Stalled since April 29th. Impacts on downstream services.
Started: May 2, 4:37 PM
monitoring
Records are being indexed in the REST API as expected again. This includes the backlog of records that were affected by this incident.
May 4, 9:41 AM
investigating
We've resolved the issue. Records are being indexed in the REST API as expected again. This includes the backlog of records that were affected by this incident.
May 4, 8:03 AM
investigating
We are continuing to investigate this issue.
May 3, 11:24 PM
investigating
No newly created records have been index in REST API since 4/29. Our technical team is investigating.
Impacts on downstream services such as Crossmark, Participation Reports, Metadata Search, and Co-Access/Multiple Resolution interim pages.
May 2, 4:37 PM
April 2026
Main website down between 05:46 UTC and 06:47 UTC
Started: Apr 17, 6:32 AM
monitoring
The website is available again. We are monitoring the situation.
Apr 17, 7:04 AM
investigating
The main Crossref website (www.crossref.org) has been down since 05:46 UTC. We are investigating the cause of the issue.
Apr 17, 6:32 AM
Depositor reports returning gateway timeout errors
Started: Apr 3, 6:31 PM
monitoring
A fix has been implemented and we are monitoring the results.
Apr 3, 6:35 PM
investigating
Our depositor reports (e.g., https://data.crossref.org/depositorreport?pubid=J533343) are returning status code 504 gateway timeout errors. We're aware of the issue and our technical team is investigating. -IF
Apr 3, 6:31 PM