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.
22 June 2021, London, UK and Boston, MA, USA — The future of global open access publishing received a boost today with the signing of a Memorandum of Understanding between the Directory of Open Access Journals (DOAJ) and Crossref. The MOU formalizes an already strong partnership between the two organisations and furthers their shared pursuit of an open scholarly communications ecosystem that is inclusive of emerging publishing communities.
Both organisations aim to encourage the dissemination and use of scholarly research using open infrastructure, online technologies, regional and international networks, and community partners - all supporting local institutional capacity and sustainability around the world.
“DOAJ is delighted to be formalizing today’s agreement with Crossref, an organisation we are already closely aligned with. Together we stand a greater chance of encouraging an open, fair, and fully inclusive future for scholarly publishing,” said Lars Bjørnshauge, DOAJ Founder and Managing Director.
The agreement will enable content from journals indexed on DOAJ to be more easily identified through the use of Crossref metadata. The MOU also covers the exchange of a variety of services and information and greater coordination of technical and strategic requirements between DOAJ and Crossref. Included too is the development of outreach and training materials, coordination of service and feature development, as well as research studies to explore the overlaps and gaps in the journals and metadata covered by each organisation.
“As academic-led journals continue to grow in number and geographic reach, it’s important we support this community more effectively. Our partnership with DOAJ means we can share strategies, data, and resources in order to lower barriers for emerging publishers around the world,” said Ginny Hendricks, Crossref’s Director of Member & Community Outreach.
About DOAJ
DOAJ is a community curated online directory that indexes and provides access to high quality, open access, peer reviewed journals. DOAJ deploys more than one hundred carefully selected volunteers from among the community of library and other academic disciplines to assist in the curation of open access journals. This independent database contains over 15,000 peer-reviewed open access journals covering all areas of science, technology, medicine, social sciences, arts and humanities. DOAJ is financially supported worldwide by libraries, publishers and other like-minded organisations. DOAJ services (including the evaluation of journals) are free for all, and all data provided by DOAJ are harvestable via OAI/PMH and the API. See doaj.org for more information.
About Crossref
Crossref makes research objects easy to find, cite, link, assess, and reuse. We’re a not-for-profit membership organisation that exists to make scholarly communications better. We rally the community; tag and share metadata; run an open infrastructure; play with technology; and make tools and services—all to help put research in context. Visit crossref.org for further information.
