Crossref status is Operational

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Public REST API
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Polite REST API
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Crossmark dialog server
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Public content negotiation
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Polite content negotiation
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Metadata search
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Last updated 1 minute ago from official status page. Learn more

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Active Incidents

No active incidents

Recently Resolved Incidents

Degraded performance on Public and Polite REST API
Started 22 Jun 2026 10:20:09 (7 days ago), resolved 24 Jun 2026 09:43:19 (5 days ago)
Minor Incident
Resolved
Public REST API
Polite REST API
Metadata search
Crossmark dialog server
Public content negotiation
More...

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.

Crossref Outage Survival Guide

A step-by-step guide to help you survive a Crossref outage
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    Crossref Components

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    Crossref APIs

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    Public REST API
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    Degraded performance on Public and Polite REST API
    Started 22 Jun 2026 10:20:09 (7 days ago), resolved 24 Jun 2026 09:43:19 (5 days ago)
    Minor Incident
    Resolved
    Public REST API
    Polite REST API
    Metadata search
    Crossmark dialog server
    Public content negotiation
    More...

    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.

    Polite REST API
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    Degraded performance on Public and Polite REST API
    Started 22 Jun 2026 10:20:09 (7 days ago), resolved 24 Jun 2026 09:43:19 (5 days ago)
    Minor Incident
    Resolved
    Public REST API
    Polite REST API
    Metadata search
    Crossmark dialog server
    Public content negotiation
    More...

    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.

    OAI-PMH
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    XML API
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    Event Data Query API
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    OpenURL
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    Crossmark dialog server
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    Degraded performance on Public and Polite REST API
    Started 22 Jun 2026 10:20:09 (7 days ago), resolved 24 Jun 2026 09:43:19 (5 days ago)
    Minor Incident
    Resolved
    Public REST API
    Polite REST API
    Metadata search
    Crossmark dialog server
    Public content negotiation
    More...

    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.

    Public content negotiation
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    now
    Degraded performance on Public and Polite REST API
    Started 22 Jun 2026 10:20:09 (7 days ago), resolved 24 Jun 2026 09:43:19 (5 days ago)
    Minor Incident
    Resolved
    Public REST API
    Polite REST API
    Metadata search
    Crossmark dialog server
    Public content negotiation
    More...

    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.

    Polite content negotiation
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    now
    Degraded performance on Public and Polite REST API
    Started 22 Jun 2026 10:20:09 (7 days ago), resolved 24 Jun 2026 09:43:19 (5 days ago)
    Minor Incident
    Resolved
    Public REST API
    Polite REST API
    Metadata search
    Crossmark dialog server
    Public content negotiation
    More...

    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.

    Crossref Metadata Plus

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    Plus REST API
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    Plus OAI-PMH
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    XML Snapshots
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    JSON Snapshots
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    Plus content negotiation
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    Key Manager
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    Crossref Content Registration

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    Admin tool
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    Test admin tool
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    Web deposit form
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    New Metadata Manager
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    Crossref Metadata files

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    Open Funder Registry
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    Retraction Watch
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    Annual public data files
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    Crossref Sites

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    Crossref website
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    Crossref support
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    Metadata search
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    Degraded performance on Public and Polite REST API
    Started 22 Jun 2026 10:20:09 (7 days ago), resolved 24 Jun 2026 09:43:19 (5 days ago)
    Minor Incident
    Resolved
    Public REST API
    Polite REST API
    Metadata search
    Crossmark dialog server
    Public content negotiation
    More...

    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.

    Participation reports
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    Crossref Integrations and external dependencies

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    Handle servers
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    Monitoring of iThenticate can be seen at https://turnitin.statuspage.io.
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    AWS cloudfront
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    ORCID Auto-update
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    Crossref Meta

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    deliberately-unreliable server
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    Demo Auth
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    Crossref Beta

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    Metadata Manager
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    Crossref Alternatives

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