Our REST API makes all of the metadata we hold publicly available. It receives the majority of our API traffic, with around 1 billion hits per month. It’s one of the key ways that we fulfil our mission to make research objects easy to find, cite, link, assess, and reuse. From 1 December 2025, we will be revising the rate limits for the public and polite pools of the REST API to ensure that we can maintain a stable and reliable system, and that metadata is freely available to everyone.
Noyam Journals, based in Accra, Ghana, was recently recognised for the completeness of its metadata through the Crossref Metadata Award, part of our 25th anniversary celebrations. Noyam was one of six publishers worldwide to receive the award and stood out as a leader among members of our Global Equitable Membership (GEM) Program.
Wednesday 22nd October 2025—Crossref, the open scholarly infrastructure nonprofit, today releases an enhanced dashboard showing metadata coverage and individual organisations’ contributions to documenting the process and outputs of scientific research in the open. The tool helps research-performing, funding, and publishing organisations identify gaps in open research information, and provides supporting evidence for movements like the Barcelona Declaration for Open Research Information, which encourages more substantial commitment to stewarding and enriching the scholarly record through open metadata.
Welcome back to our series of case studies of research funders using the Grant Linking System. In this interview, I talk with Cátia Laranjeira, PTCRIS Program Manager at FCCN|FCT, Portugal’s main public funding agency, about the agency’s approach to metadata, persistent identifiers, Open Science and Open Infrastructure.
With a holistic approach to the management, production and access to information on science, FCCN|FCT’s decision to implement the Grant Linking System within their processes was not simply a technical upgrade, but a coordinated effort to continue building a strong culture of openness. With the mantra “register once, reuse always”, FCCN|FCT efforts to embrace open funding metadata was only logical.
The Metadata Manager tool is in beta and contains many bugs. It has been deprecated since 2021 and will be sunset at the end of 2025. We recommend using an alternative such as the web deposit form, our new record registration form for journal articles and grants, or the OJS plugin if your content is hosted on the OJS platform from PKP.
Once you click Deposit, we immediately process the deposit and display the results for accepted and rejected deposits. All deposit records accepted by the system have a live DOI.
All deposit results are archived and available for reference on the Deposit history tab on the top menu bar.
You can also see your deposit history in the admin tool - go to the Administration tab, then the Submissions tab. Metadata Manager deposit filenames begin with MDT. You can even review the XML that Metadata Manager has created your behalf.
Updating existing records and failed deposits
Metadata Manager also makes it easy to update existing records, even if you didn’t use Metadata Manager to make the deposit in the first place. You must add the journal to your workspace before you can update the records associated with it - learn more about setting up a new journal in your workspace.
Accepted and Failed submissions can be updated using the respective tabs in the workspace. Click into the journal, and then click into the article. Add or make changes to the information, and then deposit.
What does the status “warning” in my submission result mean?
When similar metadata is registered for more than one DOI, it’s possible that the additional DOIs are duplicates. Because DOIs are intended to be unique, the potentially duplicated DOI is called a conflict. Learn more about the conflict report.
In Metadata Manager, if you register bibliographic metadata that is very similar to that for an existing DOI, you will see a status “warning” with your submission result. This is accurate.
When you return to your journal workspace in Metadata Manager to review your list of DOIs, the DOI that returned the “warning” will display as “failed”. This is inaccurate, as you can see if you try to resolve the DOI in question. We are working on improving the wording in this part of the process to make it less confusing.
Page maintainer: Sara Bowman Last updated: 2022-July-22
