The REST API enables flexible programmatic access to search and filter our metadata and/or match references. The Public REST API is a public, open, and free API for all anonymous users. Note that we recommend you be "polite" and self-identify as described in the "Etiquette" section of the API documentation: https://api.crossref.org

The REST API enables programmatic access to search and filter our metadata and/or match references. The Polie REST API is a public, open, and free API for all self-identified users, as described in the “Etiquette” section of the API documentation: https://api.crossref.org

The OAI-PMH (version 2) service enables the distribution of metadata in XML as as documented at http://www.openarchives.org/OAI/openarchivesprotocol.html

The XML API provides legacy support for bulk DOI matching. For more information: https://support.crossref.org/hc/en-us/articles/213420726-XML-API

A collaborative initiative by Crossref and DataCite, Event Data (https://www.eventdata.crossref.org/) meets a growing community need by offering transparency around the way interactions with scholarly research occur online, outside of publisher platforms.

The OpenURL service provides an API for use by library link resolvers. For more information: https://support.crossref.org/hc/en-us/articles/214880143-OpenURL

The service that supports the Crossmark pop-up box on members' websites. For more information on Crossmark: https://www.crossref.org/get-started/crossmark/

Provides DOI content negotiation (public pool) as described at https://crosscite.org/docs.html

Provides DOI content negotiation (polite pool) as described at https://crosscite.org/docs.html

The REST API enables flexible programmatic access to search and filter our metadata and/or match references. The Plus REST API provides enhanced support and features to Metadata Plus subscribers who are using the API for production services. For more information: https://api.crossref.org

The OAI-PMH (version 2) service enables the distribution of metadata in XML as documented at http://www.openarchives.org/OAI/openarchivesprotocol.html. This is the Plus version of the OAI-PMH that provides enhanced support and features for Metadata Plus subscribers.

Metadata Plus snapshots provide access to all our 100 million plus metadata records in a single file, providing an easy way to retrieve an up-to-date copy of our records. Snapshots are available for Metadata Plus service users. The files are made available via a /snapshots route in the REST API which offers a compressed .tar file (tar.gz) containing the full extract of the metadata corpus in XML format.

Metadata Plus snapshots provide access to all our 100 million plus metadata records in a single file, providing an easy way to retrieve an up-to-date copy of our records. Snapshots are available for Metadata Plus service users. The files are made available via a /snapshots route in the REST API which offers a compressed .tar file (tar.gz) containing the full extract of the metadata corpus in JSON format.

Provides DOI content negotiation (plus pool) as described at https://crosscite.org/docs.html

Crossref’s website - crossref.org

Our zendesk instance for opening and reviewing support tickets - support.crossref.org

Metadata search - search.crossref.org - is Crossref’s primary user interface for searching and filtering our millions of records for journal articles, books, standards, datasets and more

Participation Reports (https://www.crossref.org/members/prep/) allow publishers a centralized dashboard to view overall metadata in the Crossref system.

The Crossref admin tool (https://doi.crossref.org/), also known as the deposit queue or the submission system, where members deposit metadata, manage their accounts and more.

Crossref’s system for testing deposits and integrations (http://test.crossref.org/).

The system that points a DOI at the online location of the content

System status for the Similarity Check application, iThenticate, can be found on Turnitin's status page - https://turnitin.statuspage.io/.

A Crossref test server that is *deliberately* unreliable and used for testing the uptime monitoring system.

Demo component

Metadata Manager (https://www.crossref.org/metadatamanager/) allows you to register your content and your references in one go - and it highlights any issues as you go along, rather than having to wait for a report.