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40.6%of 32 verified observed days had no reported provider issue
90-Day Trend
Dashed calendar markers below identify legacy observations whose source-at-observation was not recorded.
Monthly Status Summary
Month
Issue-free days
Days Tracked
Days with issues
September 2026
32%
25
17
This percentage summarizes normalized provider-status observations by calendar day. It is not duration-based, component-weighted, or contractual uptime. See the methodology and limitations.
Recorded Daily Status (Last 91 Days)
Jul 2Today
Legacy observation Operational Degraded Partial Outage Major Outage Maintenance No Data
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 is investigating the issue.
A fix has been implemented and we are monitoring the results.
investigating
We had an issue with submission notifications going down around 0:00 UTC today. We re-enabled those submission notifications around 1000 UTC, but that has caused a delay in submission processing and notification delivery. As a result, processing of direct XML submissions either manually uploaded or posted to doi.crossref.org and submissions via our web deposit form - https://apps.crossref.org/webDeposit/ - are delayed. Our system is working through the backlog at the moment. -IF
Legacy Incident Archive
15 archived records restored. These records predate source-at-observation attestation. They are shown as historical ServiceAlert records only and do not establish a provider-reported incident, resolution, duration, or current active state.
A fix has been implemented and we are monitoring the results.
investigating
We are continuing to investigate this issue.
investigating
Crossref Metadata Search has been down and returning a 504 error since approximately 13:00 UTC. We are investigating.
Admin tool - doi.crossref.org - returning a 503 status code
criticalSource not attested
Last archived state: resolved
View archived record details
investigating
This incident is also resulting in errors for our members using the web deposit form and Metadata Manager. -IF
investigating
We are currently investigating this issue.
July 2026
Login issues affecting Crossref services
majorSource not attested
Last archived state: resolved
View archived record details
investigating
Some users are currently experiencing login issues with the Admin Tool, New Metadata Manager, and Web Deposit Form. We are currently investigating the issue.
Degraded performance in the REST API public and polite pools
minorSource not attested
Last archived state: resolved
View archived record details
monitoring
A fix has been implemented and we are monitoring the results.
investigating
We are continuing to investigate this issue.
investigating
We are continuing to investigate this issue.
investigating
The REST API public and polite pools are experiencing issues with requests that return lists of results, including filters and queries. Requests are intermittently not returning all matching metadata records. We are investigating the cause.
Degraded performance in the REST API public and polite pools
minorSource not attested
Last archived state: resolved
View archived record details
investigating
The REST API public and polite pools are experiencing issues with requests that return lists of results, including filters and queries. Requests are intermittently not returning all matching metadata records. We are investigating the cause.
investigating
The REST API public and polite pools are experiencing issues with requests that return lists of results, including filters and queries. Requests are intermittently not returning all matching metadata records. We are investigating the cause.
Cursor requests not returning all results in the REST API
minorSource not attested
Last archived state: resolved
View archived record details
monitoring
We are continuing to monitor for any further issues.
monitoring
We are continuing to monitor for any further issues.
monitoring
We are continuing to monitor for any further issues.
monitoring
A fix has been implemented and we are monitoring the results.
investigating
We are continuing to investigate this issue.
investigating
We have received multiple reports that requests in the REST API that use cursors to paginate through multiple pages of results are finishing early and not returning all of the requested records. We are investigating the cause. -IF
June 2026
Degraded performance on Public and Polite REST API
minorSource not attested
Last archived state: resolved
View archived record details
monitoring
We are continuing to monitor our fixes for any further issues affecting the Public and Private REST APIs, Crossmark, content negotiation, and metadata search.
monitoring
We experienced a couple of downtimes for the Public REST API at 3:09 and 4:15 UTC due to high rates of requests. We are continuing to implement fixes and are monitoring the degraded performance on the Public and REST APIs.
monitoring
We have deployed and are monitoring a fix for this issue that affected our APIs and Metadata Search.
identified
We are continuing to work on a fix for the performance issue.
identified
We are receiving a very large number of requests from a user that is applying various strategies to get around our rate limits on our public REST API pool. This is impacting performance, including on the public and polite REST API pools, Crossmark, content negotiation, Crossref Metadata Search and reference matching. We are investigating solutions.
Investigating an outage
majorSource not attested
Last archived state: resolved
View archived record details
monitoring
A fix has been implemented. The services are available again and working as expected. We are now monitoring their performance and continuing to investigate the cause of the incident.
investigating
We are investigating an incident with multiple tools and services including:
- Web deposit form (https://apps.crossref.org/webDeposit)
- Participation Reports (https://crossref.org/members/prep/)
- Browsable title list (https://www.crossref.org/titleList/)
- Other reports and forms under crossref.org
Starting from around 04.16am UTC on 16 June, users attempting to access these tools have been receiving 503 errors.
Our technical team are investigating. We'll provide updates as soon as we k...
May 2026
Degraded service on REST API
minorSource not attested
Last archived state: resolved
View archived record details
monitoring
We are continuing to monitor for any further issues.
monitoring
A fix has been implemented and we are monitoring the results.
investigating
We are experiencing delays in updating some metadata fields on the REST API. This includes citation counts, Retraction Watch retractions, aliased DOIs, and metadata in the member, journal, and funder routes. We are currently investigating the cause.
Test admin tool - test.crossref.org - returning 503 status code errors after today's deployment
