Degraded performance in the REST API public and polite pools
Update - We are continuing to investigate this issue.
Jul 07, 2026 - 20:01 UTC
Update - We are continuing to investigate this issue.
Jul 07, 2026 - 15:11 UTC
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.
Jul 07, 2026 - 13:18 UTC
Uptime over the past 90 days. View historical uptime.
APIs Degraded Performance
Public REST API Degraded Performance
Polite REST API Degraded Performance
OAI-PMH Operational
XML API Operational
OpenURL Operational
Crossmark dialog server Operational
Public content negotiation Operational
Polite content negotiation Operational
Metadata Plus Degraded Performance
Plus REST API Degraded Performance
Plus OAI-PMH Operational
XML Snapshots Operational
JSON Snapshots Operational
Plus content negotiation Operational
Key Manager Operational
Content Registration Operational
Admin tool Operational
Test admin tool Operational
Web deposit form Operational
New Metadata Manager Operational
Metadata files Operational
Open Funder Registry Operational
Retraction Watch Operational
Annual public data files Operational
Sites Degraded Performance
Crossref website Operational
Crossref support Operational
Metadata search Degraded Performance
Participation reports Operational
Integrations and external dependencies Operational
90 days ago
100.0 % uptime
Today
Handle servers Operational
Monitoring of iThenticate can be seen at https://turnitin.statuspage.io. Operational
AWS cloudfront Operational
ORCID Auto-update Operational
90 days ago
100.0 % uptime
Today
Meta Operational
deliberately-unreliable server Operational
Demo Auth Operational
Operational
Degraded Performance
Partial Outage
Major Outage
Maintenance
Major outage
Partial outage
No downtime recorded on this day.
No data exists for this day.
had a major outage.
had a partial outage.

No incidents or maintenance related to this downtime.

Scheduled Maintenance

Unplanned maintenance tomorrow, 8 July on our REST API - api.crossref.org Jul 8, 2026 08:00-12:00 UTC

We will be undergoing unplanned maintenance tomorrow from 0800 to 1200 UTC on our REST API - api.crossref.org. Users may experience outages during that four-hour window of time. -IF
Posted on Jul 07, 2026 - 20:00 UTC
System Metrics Month Week Day
Public REST API Response Time
Fetching
Public REST API Uptime
Fetching
Polite REST API Response Time
Fetching
Polite REST API Uptime
Fetching
Plus REST API Response Time
Fetching
Plus REST API Uptime
Fetching
Plus OAI-PMH Response Time
Fetching
Plus OAI-PMH Uptime
Fetching
OpenURL Response Time
Fetching
OpenURL Uptime
Fetching
Public Content Negotiation Response Time
Fetching
Public Content Negotiation Uptime
Fetching
Polite Content Negotiation Response Time
Fetching
Polite Content Negotiation Uptime
Fetching
Plus Content Negotiation Response Time
Fetching
Plus Content Negotiation Uptime
Fetching
Crossmark Response Time
Fetching
Crossmark Uptime
Fetching
Crossref Metadata Search Response Time
Fetching
Jul 8, 2026

No incidents reported today.

Jul 7, 2026
7 July - weekly maintenance, release version v0.283.0
Completed - The scheduled maintenance has been completed.
Jul 7, 16:00 UTC
In progress - Scheduled maintenance is currently in progress. We will provide updates as necessary.
Jul 7, 14:00 UTC
Scheduled - We will be undergoing scheduled maintenance - release version 0.283.0 - on 7 July from 1400 to 1600 UTC. Our members may experience delays in deposit system admin tool (doi.crossref.org) processing. Deposits submitted during this time will be stored and processed after the maintenance has been completed.
Jul 6, 14:09 UTC
Jul 6, 2026
Cursor requests not returning all results in the REST API
Resolved - This incident has been resolved and our REST API is operating normally.
Jul 6, 10:06 UTC
Update - We are continuing to monitor for any further issues.
Jul 3, 14:00 UTC
Update - We are continuing to monitor for any further issues.
Jul 3, 13:27 UTC
Update - We are continuing to monitor for any further issues.
Jul 2, 19:14 UTC
Monitoring - A fix has been implemented and we are monitoring the results.
Jul 2, 17:54 UTC
Update - We are continuing to investigate this issue.
Jul 2, 15:57 UTC
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
Jul 2, 13:00 UTC
Jul 5, 2026

No incidents reported.

Jul 4, 2026

No incidents reported.

Jul 3, 2026
Jul 2, 2026
2 July - weekly maintenance, release version v0.282.0
Completed - The scheduled maintenance has been completed.
Jul 2, 16:00 UTC
In progress - Scheduled maintenance is currently in progress. We will provide updates as necessary.
Jul 2, 13:00 UTC
Scheduled - We were unable to complete our weekly maintenance on Tuesday, 30 June, so we will be undergoing scheduled maintenance - release version 0.282.0 - tomorrow, 2 July, from 1300 to 1600 UTC. Our members may experience delays in deposit system admin tool (doi.crossref.org) processing. Deposits submitted during this time will be stored and processed after the maintenance has been completed.
Jul 1, 16:41 UTC
Jul 1, 2026
1 July - weekly maintenance [test admin tool - test.crossref.org]
Completed - The scheduled maintenance has been completed.
Jul 1, 16:00 UTC
In progress - Scheduled maintenance is currently in progress. We will provide updates as necessary.
Jul 1, 14:00 UTC
Scheduled - We will be undergoing scheduled maintenance tomorrow, 1 July, from 1400 to 1600 UTC on the test admin tool - test.crossref.org. Our members may experience delays in test admin tool (test.crossref.org) processing. Test deposits submitted during this time will be stored and processed after the maintenance has been completed. -IF
Jun 30, 17:58 UTC
Jun 30, 2026
30 June - weekly maintenance, release version v0.282.0
Completed - The scheduled maintenance has been completed.
Jun 30, 17:00 UTC
Update - Scheduled maintenance is still in progress. We'll need an additional hour today to complete today's release. We should have the release completed by 1700 UTC. -IF
Jun 30, 15:41 UTC
In progress - Scheduled maintenance is currently in progress. We will provide updates as necessary.
Jun 30, 14:00 UTC
Scheduled - We will be undergoing scheduled maintenance - release version v0.282.0 - on 30 June from 1400 to 1600 UTC. Our members may experience delays in deposit system admin tool (doi.crossref.org) processing. Deposits submitted during this time will be stored and processed after the maintenance has been completed.
Jun 29, 14:44 UTC
Jun 29, 2026

No incidents reported.

Jun 28, 2026

No incidents reported.

Jun 27, 2026

No incidents reported.

Jun 26, 2026

No incidents reported.

Jun 25, 2026

No incidents reported.

Jun 24, 2026
Degraded performance on Public and Polite REST API
Resolved - This incident has been resolved.
Jun 24, 09:43 UTC
Update - We are continuing to monitor our fixes for any further issues affecting the Public and Private REST APIs, Crossmark, content negotiation, and metadata search.
Jun 23, 16:24 UTC
Update - 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.
Jun 23, 09:01 UTC
Monitoring - We have deployed and are monitoring a fix for this issue that affected our APIs and Metadata Search.
Jun 22, 11:39 UTC
Update - We are continuing to work on a fix for the performance issue.
Jun 22, 11:22 UTC
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.
Jun 22, 10:20 UTC
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