Update - We are continuing to investigate this issue.
Jan 10, 16:01 UTC
Investigating - We are currently investigating this issue.
Dec 13, 19:15 UTC
Monitoring - Several critical vulnerabilities were recently discovered in the Log4j software developed by the Apache Software Foundation and used by web server applications across the globe.

Crossref is aware of these vulnerabilities, and our team are working to mitigate them. We can currently see no exploitations of the vulnerabilities.
Dec 20, 21:41 UTC
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
Content negotiation ? Operational
Metadata Plus Operational
Plus REST API ? Operational
Plus OAI-PMH ? Operational
XML Snapshots ? Operational
JSON Snapshots ? Operational
Sites Operational
Crossref website ? Operational
Crossref support ? Operational
Metadata search ? Operational
Participation reports ? Operational
Content Registration Operational
Admin tool ? Operational
Test admin tool ? Operational
External dependencies Operational
Handle servers ? Operational
Similarity Check via iThenticate from Turnitin - status found at https://turnitin.statuspage.io/ ? Operational
AWS cloudfront Operational
Meta Operational
deliberately-unreliable server ? Operational
Demo Auth ? Operational
Beta Operational
Metadata Manager ? Operational
Operational
Degraded Performance
Partial Outage
Major Outage
Maintenance
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
Content Negotiation Response Time
Fetching
Content Negotiation Uptime
Fetching
Crossmark Response Time
Fetching
Crossmark Uptime
Fetching
Event Data Query API Response Time
Fetching
Event Data Query API Uptime
Fetching
Crossref Metadata Search
Fetching
Past Incidents
Jan 28, 2022

No incidents reported today.

Jan 27, 2022
Completed - The scheduled maintenance has been completed.
Jan 27, 16:00 UTC
In progress - Scheduled maintenance is currently in progress. We will provide updates as necessary.
Jan 27, 15:01 UTC
Scheduled - We will be undergoing planned database maintenance on Thursday, 27 January from 1500 to 1600 UTC.
Jan 26, 15:21 UTC
Jan 26, 2022
Resolved - This incident has been resolved.
Jan 26, 18:55 UTC
Monitoring - A fix has been implemented and we are monitoring the results.
Jan 26, 16:51 UTC
Identified - The issue has been identified and a fix is being implemented.
Jan 26, 15:12 UTC
Investigating - Access is our test admin tool - test.crossref.org - is currently down. We are investigating.
Jan 26, 14:28 UTC
Jan 25, 2022
Completed - The scheduled maintenance has been completed.
Jan 25, 16:56 UTC
In progress - Scheduled maintenance is currently in progress. We will provide updates as necessary.
Jan 25, 15:00 UTC
Scheduled - We will be undergoing scheduled maintenance - release v0.109.0 - on Tuesday, 25 January from 1500 to 1700 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.
Jan 24, 15:38 UTC
Jan 24, 2022

No incidents reported.

Jan 23, 2022

No incidents reported.

Jan 22, 2022

No incidents reported.

Jan 21, 2022

No incidents reported.

Jan 20, 2022

No incidents reported.

Jan 19, 2022

No incidents reported.

Jan 18, 2022

No incidents reported.

Jan 17, 2022

No incidents reported.

Jan 16, 2022

No incidents reported.

Jan 15, 2022

No incidents reported.

Jan 14, 2022

No incidents reported.