All Systems Operational

Uptime over the past 90 days. View historical uptime.
APIs Operational
Public REST API Operational
Polite REST API Operational
OAI-PMH Operational
XML API Operational
Event Data Query API Operational
OpenURL Operational
Crossmark dialog server Operational
Public content negotiation Operational
Polite content negotiation Operational
Metadata Plus Operational
Plus REST API Operational
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 Operational
Crossref website Operational
Crossref support Operational
Metadata search Operational
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.

System Metrics Month Week Day
Public REST API Response Time
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Public REST API Uptime
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Polite REST API Response Time
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Polite REST API Uptime
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Plus REST API Response Time
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Plus REST API Uptime
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Plus OAI-PMH Response Time
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Plus OAI-PMH Uptime
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OpenURL Response Time
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OpenURL Uptime
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Public Content Negotiation Response Time
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Public Content Negotiation Uptime
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Polite Content Negotiation Response Time
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Polite Content Negotiation Uptime
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Plus Content Negotiation Response Time
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Plus Content Negotiation Uptime
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Crossmark Response Time
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Crossmark Uptime
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Event Data Query API Response Time
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Event Data Query API Uptime
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Crossref Metadata Search Response Time
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Apr 29, 2026

No incidents reported today.

Apr 28, 2026
28 April - weekly maintenance, release version 0.274.0
Completed - Today's scheduled maintenance has been cancelled.
Apr 28, 13:57 UTC
Scheduled - We will be undergoing scheduled maintenance - release version 0.274.0 - on 28 April 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.
Apr 27, 15:15 UTC
Apr 27, 2026

No incidents reported.

Apr 26, 2026

No incidents reported.

Apr 25, 2026

No incidents reported.

Apr 24, 2026

No incidents reported.

Apr 23, 2026

No incidents reported.

Apr 22, 2026

No incidents reported.

Apr 21, 2026
21 April - weekly maintenance - release v0.273.0
Completed - The scheduled maintenance has been completed.
Apr 21, 16:00 UTC
In progress - Scheduled maintenance is currently in progress. We will provide updates as necessary.
Apr 21, 14:00 UTC
Scheduled - We will be undergoing scheduled maintenance - release version 0.273.0 - on 21 April 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.
Apr 20, 16:12 UTC
Apr 20, 2026

No incidents reported.

Apr 19, 2026

No incidents reported.

Apr 18, 2026

No incidents reported.

Apr 17, 2026
Main website down between 05:46 UTC and 06:47 UTC
Resolved - From 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 after about an hour, and we have since applied tighter rate-limiting to the source. We are also reviewing options to further improve the scalability and resilience of the service going forward.
Apr 17, 10:23 UTC
Monitoring - The website is available again. We are monitoring the situation.
Apr 17, 07:04 UTC
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, 06:32 UTC
Apr 16, 2026

No incidents reported.

Apr 15, 2026

No incidents reported.

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