Failed delivery of notification emails after registration
Update - Yesterday's release did fix delivery of notification emails for many submissions, but we still have a small minority of notification emails that are going undelivered. Our technical team continues to work on a fix. -IF
Jul 17, 2025 - 16:29 UTC
Update - We'll have an emergency, unplanned release (https://status.crossref.org/incidents/c5nyp41k6vx5) in ~20 minutes to address the ongoing errors with delivery of notification emails after registrations.

During that release window - from 1500 to 1700 UTC today - 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 emergency maintenance has been completed.
Jul 16, 2025 - 14:40 UTC
Update - We are continuing to work on a fix for this issue.
Jul 15, 2025 - 20:51 UTC
Update - Delivery of email notifications of submission logs following a registration (for Simple Text Query form, web deposit form, and XML submissions) has been restored for many members and their submissions. We are working to remedy the other outstanding errors that are causing some email notifications to go undelivered. -IF
Jul 14, 2025 - 17:42 UTC
Identified - Delivery of email notifications of submission logs following a registration (for Simple Text Query form, web deposit form, and XML submissions) began failing again late yesterday. Our technical team continues to work on a fix. -IF
Jul 12, 2025 - 15:20 UTC
Update - Submissions from Metadata Manager and the Simple Text Query form have been restored. Unfortunately, delivery of email notifications of submission logs following a registration (for Simple Text Query form, web deposit form, and XML submissions) do appear to be delayed. We believe this is due to the volume of notification emails in the system, and the result of quite a backlog there. We are monitoring. -IF
Jul 11, 2025 - 21:16 UTC
Monitoring - A fix has been implemented and we are monitoring the results.
Jul 11, 2025 - 15:22 UTC
Update - We are continuing to work on a fix for this issue.
Jul 11, 2025 - 14:08 UTC
Update - We'll have an emergency, unplanned release (https://status.crossref.org/incidents/1c42q5j29ds2) in ~30 minutes to address the ongoing issues with Metadata Manager and newly reported errors with delivery of notification emails after registrations.

During that release window - from 1430 to 1630 today - 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 emergency maintenance has been completed.
Jul 11, 2025 - 14:08 UTC
Update - Errors to Crossmark dialog boxes have been fixed, as you can see with this example: https://crossmark.crossref.org/dialog/?doi=10.36676/girt.v12.i1.109&domain=pdf

We're continuing to work on Metadata Manager and the Simple Text Query form. -IF
Jul 10, 2025 - 20:36 UTC
Update - We are continuing to work on a fix for the errors present with Metadata Manager registrations. We have also identified errors with reference registrations via the Simple Text Query form (https://apps.crossref.org/SimpleTextQuery/) and errors in the display of Crossmark dialog boxes (e.g., https://crossmark.crossref.org/dialog/?doi=10.3233/JIFS-179309&domain=pdf). -IF
Jul 10, 2025 - 19:21 UTC
Identified - The issue has been identified and we continue to work on a fix for Metadata Manager registrations that are failing with the 'TypeError' error messages. We have deployed a fix for the depositor reports. That issue is resolved (e.g., https://data.crossref.org/depositorreport?pubid=J458872). -IF
Jul 10, 2025 - 14:08 UTC
Investigating - As a result of our recent AWS migration (https://status.crossref.org/incidents/s92nm4xn1w84), Metadata Manager submissions are currently returning 'TypeError' error messages and our depositor reports are returning a 404 'Not Found' status code error message. Our technical team is working on a fix. -IF
Jul 10, 2025 - 03:19 UTC
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
Record registration form ? 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
99.33 % 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
99.33 % uptime
Today
Meta Operational
deliberately-unreliable server ? Operational
Demo Auth ? Operational
Beta Operational
Metadata Manager ? 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

20 July - special, scheduled maintenance Jul 20, 2025 11:00-13:00 UTC

We will be undergoing special, scheduled maintenance on Sunday, 20 July, from 1100 to 1300 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. Members using OAI-PMH and some of our reports (e.g., depositor reports, browsable title list) may experience intermittent interruptions during this window of time. -IF
Posted on Jul 17, 2025 - 17:09 UTC
System Metrics Month Week Day
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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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OpenURL Response Time
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Public Content Negotiation Response Time
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Polite Content Negotiation Response Time
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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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Jul 18, 2025

No incidents reported today.

Jul 17, 2025

Unresolved incident: Failed delivery of notification emails after registration.

Jul 16, 2025
Emergency, unplanned maintenance today, 16 July - release v0.243.1
Completed - The scheduled maintenance has been completed.
Jul 16, 16:29 UTC
In progress - Scheduled maintenance is currently in progress. We will provide updates as necessary.
Jul 16, 15:00 UTC
Scheduled - We will be undergoing emergency, unplanned maintenance - release version 0.243.1 - today, 16 July from 1500 to 1700 UTC in order to fix the issues with notification emails. 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 16, 14:36 UTC
Jul 15, 2025
15 July - weekly maintenance - release v0.243.0
Completed - The scheduled maintenance has been completed.
Jul 15, 15:07 UTC
In progress - Scheduled maintenance is currently in progress. We will provide updates as necessary.
Jul 15, 14:00 UTC
Scheduled - We will be undergoing scheduled maintenance - release version v0.243.0 - on Tuesday, 15 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 14, 15:06 UTC
Jul 14, 2025
Jul 13, 2025

No incidents reported.

Jul 12, 2025
Jul 11, 2025
Emergency, unplanned maintenance today, 11 July - release v0.242.2
Completed - The scheduled maintenance has been completed.
Jul 11, 15:23 UTC
In progress - Scheduled maintenance is currently in progress. We will provide updates as necessary.
Jul 11, 14:30 UTC
Scheduled - We will be undergoing emergency, unplanned maintenance - release version 0.242.2 - today, 11 July from 1430 to 1630 UTC in order to fix the issues with Metadata Manager and notification emails. 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 11, 13:44 UTC
Jul 10, 2025
Jul 9, 2025
Notification of 24-hour downtime to move Crossref fully into the cloud (8-9 July)
Completed - The scheduled maintenance has been completed.
Jul 9, 21:00 UTC
Update - We are continuing to verify the items included in today's release. Many of our services have been restored, but our technical team is continuing to work through configuration changes for our web deposit form and Metadata Manager tools. Our depositor reports are also returning some errors at the moment. - IF
Jul 9, 19:22 UTC
Update - We are continuing to verify the maintenance items.
Jul 9, 16:22 UTC
Verifying - Verification is currently underway for the maintenance items.
Jul 9, 13:26 UTC
Update - Scheduled maintenance is still in progress. We will provide updates as necessary.
Jul 9, 02:56 UTC
In progress - Scheduled maintenance is currently in progress. We will provide updates as necessary.
Jul 8, 21:00 UTC
Update - We will be undergoing scheduled maintenance during this time.
Jun 24, 15:09 UTC
Scheduled - We will be undergoing an extended scheduled maintenance window of up to 24 hours, from 21:00 UTC 8 July 2025 to 21:00 UTC 9 July 2025. We will be migrating the final part of our system to cloud infrastructure. The migration will require complete downtime, during which all Crossref services will be unavailable (with the exception of our REST API, which will remain up), and attempts to access these services, including making a metadata deposit, will receive a 500 error message; you will need to retry when services are back online. This downtime will not affect the resolution of Crossref DOI links, which will continue to work. We apologise for any disruption as we migrate our system to a new infrastructure.

What will change?
When our services come back online, the timezone will have shifted to UTC (from US ET). This mainly impacts the timestamps reported back to you when metadata deposits are received, started, and finished processing. This change will not impact the timestamps in the REST API, which are already reported in UTC.

Our IP address will no longer remain static, but will change. If you are using our IP address to connect to our services, this will no longer work.

We currently allow connections using HTTP/1.0 protocol, but after the maintenance, we will require HTTP/1.1. Likewise, we currently allow TLS version 1.1, but after the migration, we will require at least version 1.2. Older ciphers will not work. A list of accepted ciphers can be found on this page (https://docs.aws.amazon.com/elasticloadbalancing/latest/application/describe-ssl-policies.html#tls-security-policies) for “ELBSecurityPolicy-TLS13-1-2-2021-06”.

Thanks for your patience and understanding; this will be a significant milestone in modernising the Crossref system.
Jun 23, 14:13 UTC
Jul 8, 2025
Jul 7, 2025

No incidents reported.

Jul 6, 2025

No incidents reported.

Jul 5, 2025

No incidents reported.

Jul 4, 2025

No incidents reported.

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