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Open Access

Score 32.0 / 100 140 providers +55 via APIs 231 APIs Search apis.io →
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Providers using this tag (140)

Ranked by API Evangelist rating — Exemplar and Strong are expanded by default.

Developing 15 Usable, with meaningful gaps to close
Uppsala UniversityUniversityHigher EducationEducationSweden1 API49.4Delft University of TechnologyUniversityHigher EducationEducationTechnical University1 API47.8Pennsylvania State UniversityEducationHigher EducationUniversityPublic Research University3 APIs46.5University of CambridgeEducationHigher EducationUniversityResearch1 API45.6DeSci LabsCompanyAi Enterprise SoftwareResearch InfrastructureDecentralized Science1 API45.3arXivScholarly PublishingPreprintsResearch2 APIs44.3RWTH Aachen UniversityEducationHigher EducationUniversityTechnical University1 API44.3University of TokyoUniversityHigher EducationEducationJapan3 APIs44.3DryadResearch DataOpen ScienceResearch RepositoryDatasets1 API44.1Hamad Bin Khalifa UniversityUniversityHigher EducationEducationResearch1 API40.8Nekosia APIAnimenekonekosneko api1 API40.2Erasmus University RotterdamUniversityHigher EducationEducationNetherlands1 API40.0Utrecht UniversityEducationHigher EducationUniversityNetherlands2 APIs39.7University of ReadingUniversityHigher EducationEducationResearch3 APIs39.6TU WienUniversityHigher EducationEducationTechnical University1 API39.4
Thin 57 Limited public surface area
Smithsonian InstitutionMuseumsCultural HeritageCollection1 API31.5DOAJJournalsScholarly PublishingMetadata1 API29.5UnpaywallScholarly ArticlesResearchAcademic1 API26.3ZenodoResearchOpen DataRepositoryDOI1 API39.1Australian National UniversityUniversityHigher EducationEducationResearch3 APIs38.5University of SheffieldUniversityHigher EducationEducationUnited Kingdom1 API38.4Kyoto UniversityUniversityHigher EducationEducationJapan2 APIs38.3University of Hong KongEducationHigher EducationUniversityHong Kong1 API38.2EPFLUniversityHigher EducationEducationTechnical University3 APIs37.6University of LisbonUniversityHigher EducationEducationPortugal1 API37.5King Fahd University of Petroleum & MineralsUniversityHigher EducationEducationResearch4 APIs37.3FigshareResearch DataResearch RepositoryOpen ScienceDOI1 API37.1McMaster UniversityUniversityHigher EducationEducationCanada1 API36.4University of BirminghamEducationHigher EducationUniversityUnited Kingdom1 API36.4Carnegie Mellon UniversityUniversityHigher EducationEducationUnited States3 APIs36.2National Center for Biotechnology Information (NCBI)BioinformaticsGenomicsLife SciencesPubMed1 API36.1Seoul National UniversityUniversityHigher EducationEducationSouth Korea3 APIs36.1University of YorkUniversityHigher EducationEducationUnited Kingdom3 APIs35.6Karlsruhe Institute of TechnologyEducationHigher EducationUniversityTechnical University9 APIs35.1University of CalgaryEducationHigher EducationUniversityPublic Research University2 APIs35.1Springer NatureScholarly PublishingResearchScholarly Content2 APIs34.9University of OxfordUniversityHigher EducationEducationResearch4 APIs34.8University of the WitwatersrandUniversityHigher EducationEducationResearch2 APIs34.2University of OttawaUniversityHigher EducationEducationCanada3 APIs34.0CrossrefCitationsDOIFundersIdentifiers1 API33.7Nanyang Technological UniversityUniversityHigher EducationEducationSingapore3 APIs33.5Semantic ScholarAcademicResearchPaperCitations3 APIs33.4University College DublinUniversityHigher EducationEducationIreland1 API33.0Université libre de BruxellesUniversityHigher EducationEducationBelgium2 APIs32.5Technical University of BerlinUniversityHigher EducationEducationTechnical University8 APIs32.1University of TübingenEducationHigher EducationUniversityGermany8 APIs32.1Al-Farabi Kazakh National UniversityEducationHigher EducationUniversityResearch1 API31.8University of BaselUniversityHigher EducationEducationSwitzerland7 APIs30.9Maastricht UniversityUniversityHigher EducationEducationNetherlands1 API30.8Université de MontréalUniversityHigher EducationEducationCanada1 API30.0Tokyo Institute of TechnologyEducationHigher EducationUniversityInstitute of Technology1 API29.5University of Los Andes ColombiaUniversityHigher EducationEducationColombia1 API29.4University of PittsburghUniversityHigher EducationEducationUnited States1 API28.8Kyushu UniversityUniversityHigher EducationEducationResearch1 API28.7Indian Institute of Science BangaloreEducationHigher EducationUniversityIndia1 API28.6TU DresdenUniversityHigher EducationEducationGermany7 APIs28.6Massey UniversityEducationHigher EducationUniversityNew Zealand2 APIs28.5Imperial College LondonUniversityHigher EducationEducationRussell Group1 API28.0University of WaikatoEducationHigher EducationUniversityNew Zealand1 API28.0Chulalongkorn UniversityEducationHigher EducationUniversityResearch2 APIs27.8Indian Institute of Technology KanpurEducationHigher EducationUniversityInstitute of Technology2 APIs27.7Victoria University of WellingtonUniversityHigher EducationEducationNew Zealand6 APIs27.4FatcatScholarlyResearchAcademic1 API27.3University of LiverpoolEducationHigher EducationUniversityRussell Group14 APIs27.2Universität HamburgEducationHigher EducationUniversityGermany1 API27.2bioRxivBiologyPreprintsResearch2 APIs27.1Curtin UniversityUniversityHigher EducationEducationResearch2 APIs26.7Friedrich-Alexander-Universität Erlangen-NürnbergUniversityHigher EducationEducationResearch9 APIs26.6Sungkyunkwan UniversityUniversityHigher EducationEducationResearch6 APIs26.6University of WollongongEducationHigher EducationUniversityAustralia8 APIs26.6Nagoya UniversityEducationHigher EducationUniversityJapan5 APIs26.4University of GlasgowUniversityHigher EducationEducationUnited Kingdom1 API26.2
Emerging 56 Early or largely undocumented
Heriot-Watt UniversityUniversityHigher EducationEducationScotland6 APIs25.9Leiden UniversityUniversityHigher EducationEducationNetherlands9 APIs25.9Universiti Kebangsaan MalaysiaUniversityHigher EducationEducationResearch4 APIs25.6Humboldt-Universität zu BerlinUniversityHigher EducationEducationResearch3 APIs25.5National University of SingaporeUniversityHigher EducationEducationSingapore10 APIs25.5Autonomous University of BarcelonaEducationHigher EducationUniversitySpain1 API25.1medRxivHealth SciencesPreprintsResearch1 API25.1École des Ponts ParisTechUniversityHigher EducationEducationTechnical University4 APIs25.1Universiti Sains MalaysiaUniversityHigher EducationEducationPublic Research University2 APIs24.9University of NottinghamEducationHigher EducationUniversityRussell Group5 APIs24.7Keio UniversityEducationHigher EducationUniversityJapan2 APIs24.2ACM Digital LibraryAcademicBibliographic RecordsCitationsComputing3 APIs24.1Technical University of DarmstadtEducationHigher EducationUniversityTechnical University10 APIs24.1University of St AndrewsEducationHigher EducationUniversityPublic Research University7 APIs23.8University of BernUniversityHigher EducationEducationSwitzerland10 APIs23.6Waseda UniversityUniversityHigher EducationEducationJapan10 APIs23.6Trinity College DublinUniversityHigher EducationEducationIreland12 APIs23.2Western UniversityUniversityHigher EducationEducationResearch6 APIs22.3Sorbonne UniversityEducationHigher EducationUniversityFrance5 APIs22.2Tohoku UniversityUniversityHigher EducationEducationResearch5 APIs22.2Ohio State UniversityUniversityHigher EducationEducationUnited States1 API22.1Queensland University of TechnologyUniversityHigher EducationEducationAustralia3 APIs22.1Aarhus UniversityUniversityHigher EducationEducationResearch5 APIs21.8Norwegian University of Science and TechnologyEducationHigher EducationUniversityResearch7 APIs21.8Vrije Universiteit AmsterdamUniversityHigher EducationEducationNetherlands7 APIs21.6Sapienza University of RomeEducationHigher EducationUniversityItaly7 APIs21.4University of SussexUniversityHigher EducationEducationUnited Kingdom5 APIs20.9University of AberdeenEducationHigher EducationUniversityResearch10 APIs20.7University of PaduaUniversityHigher EducationEducationItaly5 APIs20.7Queen Mary University of LondonUniversityHigher EducationEducationResearch11 APIs20.5University of ZurichEducationHigher EducationUniversityPublic Research University5 APIs20.3École Normale Supérieure de LyonUniversityHigher EducationEducationFrance8 APIs20.3École Normale Supérieure de ParisUniversityHigher EducationEducationFrance3 APIs20.3Boston UniversityUniversityHigher EducationEducationUnited States1 API20.2Loughborough UniversityEducationHigher EducationUniversityUnited Kingdom7 APIs20.2Hebrew University of JerusalemUniversityHigher EducationEducationResearch1 API19.8Universiti Teknologi MalaysiaUniversityHigher EducationEducationPublic Research University6 APIs19.8Hokkaido UniversityEducationHigher EducationUniversityJapan10 APIs19.7University of NavarraEducationHigher EducationUniversitySpain1 API19.3American University of BeirutUniversityHigher EducationEducationLebanon11 APIs19.1Indian Institute of Technology DelhiEducationHigher EducationUniversityInstitute of Technology1 API19.1Qatar UniversityEducationHigher EducationUniversityQatar4 APIs19.0University of OtagoUniversityHigher EducationEducationNew Zealand5 APIs18.6Universiti Putra MalaysiaUniversityHigher EducationEducationMalaysia3 APIs18.5UCLEducationHigher EducationUniversityUnited Kingdom6 APIs18.3Universiti Teknologi PETRONASUniversityHigher EducationEducationMalaysia2 APIs18.3University of BolognaEducationHigher EducationUniversityItaly12 APIs18.2Stockholm UniversityEducationHigher EducationUniversityResearch4 APIs17.8Autonomous University of MadridUniversityHigher EducationEducationSpain9 APIs16.9University of BarcelonaUniversityHigher EducationEducationSpain10 APIs15.4University of ChileEducationHigher EducationUniversityPublic University10 APIs15.1University of CanterburyEducationHigher EducationUniversityNew Zealand8 APIs15.0AcademiaCompanyAcademic Researchresearch-papersScholarly Publishing14.9La Trobe UniversityEducationHigher EducationUniversityAustralia3 APIs14.7Queen's University BelfastUniversityHigher EducationEducationResearch5 APIs14.2RMIT UniversityEducationHigher EducationUniversityResearch Data1 API12.3
Minimal 12 Almost no public developer surface
COREPublic APIsScholarlyResearch1 API4.7PLOSScientific ArticlesResearchSearchSolr1 API9.1Open Science FrameworkPublic APIsResearch DataResearch Repository1 API5.7GeoCatGeospatialOGCWMSWFS2 APIs5.3GeoSolutionsGeospatialOGCWMSWFS2 APIs5.3OpenAlexPublic APIsResearch DataScholarlyCitations1 API5.2EPrintsCompanyOpen SourceDigital RepositoryResearch Infrastructure4.4Internet ArchiveDigital LibraryNon-ProfitArchival1 API4.0Deutscher WetterdienstGeospatialOGCWMSWFS1 API3.4Eurac ResearchGeospatialOGCWMSWFS1 API3.4Flanders Marine InstituteGeospatialOGCWMSWFS1 API3.4SpacebelGeospatialOGCWMSWFS1 API3.4

APIs with this tag (230)

Ranked by the provider's API Evangelist rating — the Kin Score is scored per provider, not per API, so every API of a provider shares its band. How the rating works →

Exemplar 1 Complete, well-documented, and agent-ready
Canonical Open Access APIDo not require the user to authenticate.74.9
Strong 1 Solid coverage with minor gaps
UWSpace DSpace REST APIThe REST backend of UWSpace, the University of Waterloo institutional repository, running DSpace 8.4 on a U...64.0
Developing 25 Usable, with meaningful gaps to close
DiVA OAI-PMHDiVA (Academic Archive On-line) is Uppsala University Library's institutional repository for publications a...49.4Editori (journals.helsinki.fi) OAI-PMH InterfaceOAI-PMH 2.0 endpoint for Editori, the University's open publishing service (PKP Open Journal Systems). Iden...48.6Helda DSpace REST APIPublic HAL REST API for Helda, the University's open institutional repository, running DSpace 7.6.2. Discov...48.6Helda OAI-PMH Metadata InterfaceOAI-PMH 2.0 harvesting endpoint for Helda. Identify returns repositoryName "Helda" with an earliest datesta...48.6PJM Messages Public Web ServiceThe only fully anonymous PJM REST API found on the public surface. It backs the PJM Upcoming Changes page a...47.6ETDA OAI-PMH ProviderAn open OAI-PMH 2.0 harvesting endpoint over Penn State's Electronic Theses and Dissertations Archive, serv...46.5Apollo Institutional Repository API (DSpace)Cambridge's open-access research repository (Apollo) on the DSpace platform, exposing OAI-PMH metadata harv...45.6Apollo OAI-PMH metadata harvesting endpointOAI-PMH 2.0 harvesting interface for Apollo, the University's institutional repository, served from Cambrid...45.6RWTH Publications OAI-PMHRWTH Publications is the institutional repository providing access to the publication output of RWTH Aachen...44.3bonndoc Publication Server OAI-PMH EndpointOAI-PMH 2.0 endpoint for bonndoc, "Der Publikationsserver der Universitaet Bonn" — the university's DSpace-...43.4UCSB on eScholarshipUCSB’s open-access scholarship collection inside eScholarship, the University of California’s systemwide re...42.8eScholarship — UC Davis unit (tenant)UC Davis's open-access scholarly output is deposited into eScholarship, the University of California's shar...41.8KU Leuven RDR OAI-PMH Harvesting InterfaceOAI-PMH 2.0 interface of the Research Data Repository, served from KU Leuven's own host. Identify returned ...41.5MINDS@UW OAI-PMH EndpointLive OAI-PMH 2.0 harvesting endpoint for MINDS@UW, UW-Madison's institutional repository. Confirmed with ?v...41.5ReIn UW Institutional Repository REST APIThe Institutional Repository of the University of Warsaw (ReIn UW, Repozytorium Instytucjonalne Uniwersytet...41.0ReIn UW OAI-PMH EndpointOAI-PMH 2.0 metadata harvesting endpoint for the Institutional Repository of the University of Warsaw. verb...41.0Elmi Research Portal — OAI-PMHHBKU's research information system, Elmi, runs Elsevier Pure on the university's own subdomain and exposes ...40.8Manara — Qatar Research Repository (HBKU portal)HBKU's scholarly output is deposited in Manara — Qatar Research Repository, a Figshare platform operated by...40.8UMN Digital Conservancy — OAI-PMH and DSpace RESTThe University of Minnesota Digital Conservancy, which also holds DRUM (Data Repository for the University ...40.8GUPEA DSpace 8 REST APIThe HAL+JSON REST API of the same repository, on the same University host. Verified live 2026-09-01: anonym...40.2ResearchWorks Repository (DSpace REST + OAI-PMH)ResearchWorks is UW Libraries' institutional repository, running DSpace 9.2 on UW's own host. The DSpace RE...39.7Utrecht University Repository OAI-PMHOAI-PMH 2.0 metadata harvesting interface for the Utrecht University Library institutional repository. Veri...39.7Utrecht University Repository REST APIThe DSpace 9.0 HAL/JSON REST API behind the Utrecht University Repository. Openly readable without a key: t...39.7reposiTUm DSpace REST APIThe DSpace 7 REST layer of reposiTUm is deployed but fronted by a crawler filter: /server/api returned 503 ...39.4reposiTUm OAI-PMHOAI-PMH 2.0 interface for reposiTUm, the open-access institutional repository of TU Wien, implemented on DS...39.4
Thin 90 Limited public surface area
Texas ScholarWorks DSpace REST APIPublic DSpace REST API for Texas ScholarWorks, the UT Libraries institutional repository of theses, dissert...38.6Texas ScholarWorks OAI-PMH EndpointOAI-PMH 2.0 metadata-harvesting endpoint for Texas ScholarWorks. An Identify request returns repositoryName...38.6White Rose eTheses Online OAI-PMHWhite Rose eTheses Online is the shared electronic theses repository of the same three universities, runnin...38.4White Rose Research Online OAI-PMHWhite Rose Research Online is the shared open-access outputs repository of the Universities of Leeds, Sheff...38.4KURENAI OAI-PMH APIOAI-PMH 2.0 metadata harvesting interface for KURENAI, the Kyoto University Research Information Repository...38.3HKU Scholars Hub OAI-PMHHKU Scholars Hub is the University's DSpace-based open-access institutional repository and current research...38.2IRIS PoliTO OAI-PMH Metadata Service (CINECA deployment)OAI-PMH 2.0 harvesting service over IRIS, Politecnico di Torino's institutional research repository, reacha...38.2Elsevier Pure CRIS tenancy (REST + OAI-PMH)The University's tenancy of Elsevier Pure, its Current Research Information System, reached at pure.manches...38.1DSpace Institutional Repository (Central Library)The IIT Bombay Central Library institutional repository, running DSpace over theses, journal articles and c...37.7EPFL Infoscience Institutional RepositoryInfoscience is EPFL's institutional repository and CRIS, self-hosted on EPFL infrastructure and running DSp...37.6Repositorio da Universidade de Lisboa — DSpace REST APIAnonymous HAL+JSON REST API of the institution's DSpace 7.6.1 repository — communities, collections, items,...37.5Repositorio da Universidade de Lisboa — OAI-PMHOAI-PMH 2.0 metadata harvesting interface over the DSpace 7.6.1 institutional open-access repository. Opera...37.5IEEE Xplore Open Access APIFull-text retrieval endpoint for articles designated as IEEE Open Access or chargeable open content. Return...37.3WashU Scholarly Repository (OAI-PMH)The university's institutional repository, "WashU Scholarly Repository", serving a live OAI-PMH 2.0 interfa...37.3ePapers Repository (EPrints OAI-PMH)OAI-PMH 2.0 metadata harvesting interface for the University of Birmingham ePapers EPrints repository, hold...36.4MacSphere Institutional RepositoryMcMaster University Libraries' institutional repository of theses, dissertations and open-access research o...36.4ResearchSpace OAI-PMH 2.0 ServiceLive OAI-PMH 2.0 metadata harvesting endpoint for ResearchSpace, the University's self-hosted DSpace instit...36.4UBIRA eTheses (EPrints OAI-PMH)OAI-PMH 2.0 metadata harvesting interface for the University of Birmingham eTheses EPrints repository, hold...36.4KiltHub Institutional Repository (figshare) — tenantKiltHub is Carnegie Mellon's institutional repository for research data and scholarly output. The data, the...36.2PMC OAI-PMH ServiceThe PMC OAI-PMH (Open Archives Initiative Protocol for Metadata Harvesting) service allows bulk harvesting ...36.1PMC Open Access API (OA Service)The PubMed Central Open Access API retrieves citation data, licensing details, and FTP download locations f...36.1White Rose eTheses Online OAI-PMH (consortium)White Rose eTheses Online is the shared EPrints theses repository of York, Leeds and Sheffield, running on ...35.6White Rose Research Online OAI-PMH (consortium)White Rose Research Online is the shared EPrints institutional repository of the Universities of York, Leed...35.6Aaltodoc Repository — OAI-PMH and DSpace RESTAalto's institutional repository of theses, articles and conference publications, running Aalto-hosted DSpa...35.3KITopen OAI-PMH InterfaceKITopen is KIT's central open-access institutional repository for the bibliographic data, full texts, image...35.1PRISM Institutional Repository (DSpace on Scholaris)PRISM is the University of Calgary's institutional repository — the university's content, the university's ...35.1University of Calgary Journal Hosting (OJS) OAI-PMHThe university's own Open Journal Systems 3.4.0.10 installation, hosting UCalgary scholarly journals and ex...35.1Springer Nature Open Access APIThe Open Access API from Springer Nature — 2 operation(s) for open access.34.9Harvard DASH institutional repository (4Science-managed DSpace)DASH (Digital Access to Scholarship at Harvard) is Harvard's open-access institutional repository of 58,000...34.4Columbia Academic CommonsColumbia University's institutional research repository, holding the scholarly output, theses and research ...33.9DR-NTU (Digital Repository) — OAI-PMHA fully conformant OAI-PMH 2.0 metadata harvesting endpoint over DR-NTU, serving 11 metadata formats and de...33.5OpenEmory Repository (Samvera Hyrax / ResourceSync)OpenEmory is Emory's open-access institutional repository, running Samvera Hyrax 5.2.0 on Emory infrastruct...33.4DIAL.mem -- DSpace-CRIS REST APIDIAL.mem is UCLouvain's institutional repository for master's theses, part of the DIAL (Digital Access to L...32.4DIAL.mem OAI-PMHOAI-PMH 2.0 harvesting endpoint for DIAL.mem, UCLouvain's master's-thesis repository. Identify returns repo...32.4DIAL.pr (BOREAL) -- DSpace-CRIS REST APIDIAL.pr, branded BOREAL, is UCLouvain's institutional repository for the research publications of its profe...32.4DIAL.pr OAI-PMHOAI-PMH 2.0 harvesting endpoint for DIAL.pr, UCLouvain's research-publications repository. Identify returns...32.4OER-UCLouvain OAI-PMHOER-UCLouvain is the institution's open educational resources repository, running DSpace JSPUI on oer.uclou...32.4DepositOnce DSpace REST APIDSpace 9.4 REST/HAL API for DepositOnce, exposing communities, collections, items, bitstreams, discovery, v...32.1DepositOnce OAI-PMH InterfaceOpen Archives Initiative Protocol for Metadata Harvesting (OAI-PMH 2.0) endpoint for DepositOnce, TU Berlin...32.1TOBIAS-lib / Publikationssystem UB Tübingen OAI-PMHOAI-PMH 2.0 provider for the University Library's institutional publication server (TOBIAS-lib), running DS...32.1KazNU Bulletin OAI-PMH RepositoriesSeven OAI-PMH 2.0 metadata harvesting endpoints operated by Al-Farabi Kazakh National University on its own...31.8Project MUSE OAI-PMH RepositoryProject MUSE, operated by Johns Hopkins University Press, exposes an OAI-PMH 2.0 harvesting endpoint that a...31.8OpenUCT DSpace REST APIThe OpenUCT repository additionally exposes the DSpace 7 REST API anonymously at open.uct.ac.za/server/api,...31.7OpenUCT Institutional Repository OAI-PMHOpenUCT is the University of Cape Town's open access institutional repository, running DSpace 7.4 on UCT's ...31.7eScholarship@McGill on Scholaris (tenant)McGill's institutional research repository, running as a tenant on Scholaris. It exposes a DSpace REST (HAL...31.5edoc DSpace REST APIPublic DSpace REST API for "edoc", the open-access institutional repository of the University of Basel, run...30.9edoc OAI-PMHOAI-PMH 2.0 metadata harvesting interface for edoc. Identify reports repositoryName "edoc: Open Access Repo...30.9ORCA OAI-PMH InterfaceOnline Research @ Cardiff (ORCA) is Cardiff University's own EPrints institutional repository, listed as an...30.6ScholarlyCommons at Penn — DSpace REST APIDSpace 7.6 HAL+JSON REST API on Penn's own host. The API root returned HTTP 200 advertising dspaceName "Sch...30.6PubMed Central (PMC) OA APIAPIs for programmatic access to PubMed Central's Open Access content, including file validation, Open Acces...30.4UCSF scholarly output via eScholarship OAI-PMHUCSF's open-access scholarly output is harvestable as a named OAI-PMH set on the University of California's...30.3PAPYRUS DSpace REST API (HAL)The DSpace 8 REST API behind PAPYRUS, answering anonymously at the HAL root and advertising the repository'...30.0PAPYRUS OAI-PMH Endpoint (institutional repository)OAI-PMH 2.0 harvesting interface for PAPYRUS, Université de Montréal's institutional repository of open-acc...30.0Science Tokyo Repository OAI-PMH (JAIRO Cloud tenant)OAI-PMH 2.0 endpoint for the institution's tenancy on JAIRO Cloud — the successor repository named in the T...29.5Repositorio Institucional Seneca - DSpace REST APIDSpace 7 REST API for the "Seneca" repository, under the /server/api path of the deployment. Confirmed to b...29.4Repositorio Institucional Seneca - OAI-PMHOAI-PMH metadata harvesting interface for "Seneca", the DSpace 7 institutional repository that collects the...29.4ULS E-Journal Publishing — OAI-PMH 2.0 providersThe University Library System publishes dozens of open-access journals on PKP Open Journal Systems that ULS...28.8ePrints@IISc OAI-PMHePrints@IISc is the open-access institutional repository of IISc research publications, established in 2002...28.6ETD@IISc DSpace 6 REST APIRead-only REST API of ETD@IISc, the Electronic Theses and Dissertations repository IISc runs on DSpace 6 at...28.6Journal of the Indian Institute of Science OAI-PMHLive OAI-PMH 2.0 metadata-harvesting provider for the Journal of the Indian Institute of Science, served fr...28.6OPARA OAI-PMH Harvesting InterfaceThe standards-based harvesting interface for OPARA — how TU Dresden's research data reaches OpenAIRE, BASE,...28.6OPARA Research Data Repository REST APIThe DSpace 7.6.2 REST API of OPARA, the open-access research-data repository ZIH operates for TU Dresden an...28.6Qucosa TU Dresden OAI-PMH (Institutional Document Server)The OAI-PMH 2.0 harvesting interface for the TU Dresden instance of Qucosa, the Saxon document and publicat...28.6White Rose Research Online (OAI-PMH) — consortium tenancyRELATIONSHIP, NOT A CONTRACT. Leeds' scholarly publications repository is White Rose Research Online, a sha...28.3eScholarship Repository and OAI-PMH (California Digital Library tenant)eScholarship is the University of California's open-access publishing platform and institutional repository...28.2Research Commons DSpace REST APIDSpace 7.6.5 REST API backing Research Commons, giving programmatic access to communities, collections, ite...28.0Research Commons OAI-PMHOAI-PMH 2.0 metadata harvesting interface for Research Commons, the university's open-access institutional ...28.0Spiral OAI-PMH Metadata Harvesting EndpointA fully functional OAI-PMH 2.0 harvesting interface — the standards-based way Imperial's research outputs r...28.0Spiral Open Access Repository (DSpace 7 REST API)Imperial's institutional open-access repository, exposed over the DSpace 7 HAL+JSON REST API at https://spi...28.0Chula Digital Collections (bepress Digital Commons tenant)The university's open-access journals, theses and ETD platform, and the only working OAI-PMH endpoint in th...27.8Chula DigiVerse — Institutional Digital RepositoryThe university's digital preservation platform for theses, dissertations, rare books, multimedia and digiti...27.8IIT Kanpur PKK Library OAI-PMH APIOAI-PMH 2.0 metadata-harvesting endpoint for the P.K. Kelkar Library catalog, operated on the institution's...27.7Open Access Repository (Figshare tenancy)The university's Open Access institutional repository is a Figshare portal running on the institution's own...27.4E-Dissertationen (ediss.sub.hamburg) OAI-PMHOAI-PMH 2.0 metadata-harvesting interface for the DSpace-based institutional repository of electronic disse...27.2Hamburg University Press OAI-PMHOAI-PMH 2.0 interface of Hamburg University Press, the open-access publishing house of the Staats- und Univ...27.2HUP Journal Server OAI-PMHOAI-PMH 2.0 interface of the journal server of Hamburg University Press. Verified live 2026-09-01: reposito...27.2Open-Access-Portal Universität HamburgOpen Access discovery portal aggregating freely available publications, research data, teaching materials a...27.2University of Liverpool Repository EPrints RESTKeyless, read-only EPrints REST interface on the institutional repository. Verified live 2026-09-01: GET /r...27.2University of Liverpool Repository OAI-PMHOAI-PMH 2.0 metadata-harvesting interface for the University of Liverpool Repository, an EPrints 3.4.5 open...27.2Curtin Curate Research Repository (Figshare tenant)Curtin's institutional research repository, formerly espace on Ex Libris, now running on Figshare at curate...26.7OPEN FAU DSpace REST APIThe REST/HAL API of OPEN FAU, FAU's DSpace 7.4 institutional repository, run by the University Library on F...26.6OPEN FAU OAI-PMH Metadata ServiceOpen Archives Initiative Protocol for Metadata Harvesting 2.0 service for OPEN FAU, the university's open-a...26.6Research Online (Figshare tenancy)Research Online is UOW's open access institutional repository, and since its 2025 platform migration it is ...26.6Scholarworks@UAEU OAI-PMH Repository EndpointOAI-PMH 2.0 metadata harvesting endpoint for Scholarworks@UAEU, the university's open-access institutional ...26.5NAGOYA Repository OAI-PMH (NII WEKO3 / JAIRO Cloud tenant)OAI-PMH 2.0 metadata harvesting interface for the NAGOYA Repository, Nagoya University's institutional repo...26.4Open Research Exeter (ORE) - Figshare TenancyOpen Research Exeter is Exeter's institutional research repository and it is a Figshare tenancy, not instit...26.4Vanderbilt Institutional Repository (VUIR)Self-hosted DSpace 9.1 institutional repository on Vanderbilt's own domain and infrastructure. The HAL REST...26.4Vanderbilt Institutional Repository OAI-PMHOAI-PMH 2.0 harvesting endpoint for the Vanderbilt Institutional Repository. Identify returns repositoryNam...26.4Enlighten Publications OAI-PMHOAI-PMH 2.0 metadata harvesting over Enlighten, the University of Glasgow's EPrints institutional repositor...26.2Enlighten Theses OAI-PMHOAI-PMH 2.0 metadata harvesting over Enlighten Theses, the University of Glasgow's electronic theses reposi...26.2
Emerging 105 Early or largely undocumented
Heriot-Watt Research Output Service (ROS)The university's own institutional repository of theses and research outputs, running DSpace 8 on www.ros.h...25.9Heriot-Watt Research Portal (Elsevier Pure)Heriot-Watt's public research information portal — publications, projects, research data, activities and re...25.9Scholarly Publications OAI-PMHOAI-PMH 2.0 metadata harvesting endpoint for Leiden University Scholarly Publications, the Islandora-based ...25.9UKM Journal Article Repository (OAI-PMH) — unreachableEPrints repository of journal articles published by UKM faculties, institutes and UKM Press, registered in ...25.6edoc-Server DSpace REST APIPublic, unauthenticated read API of the edoc-Server, the Open Access institutional repository of Humboldt-U...25.5edoc-Server OAI-PMH 2.0 InterfaceOAI-PMH 2.0 metadata harvesting endpoint for the edoc institutional repository, on HU's own host. ?verb=Ide...25.5GenderOpen Repositorium — HU DOI tenancyGenderOpen is the shared open-access repository for gender studies run jointly by the Freie Universität Ber...25.5ScholarBank@NUS DSpace REST APIThe HAL-style REST API of ScholarBank@NUS, the university's institutional repository — communities, collect...25.5ScholarBank@NUS OAI-PMH InterfaceOAI-PMH 2.0 metadata harvesting endpoint for ScholarBank@NUS, advertising twelve metadata formats including...25.5HAL — ENPC Open-Access Collection (tenant)ENPC's institutional open-access repository is the ENPC collection inside HAL, the French national open arc...25.1Revistes UAB — Open Journal Systems (per-journal OAI-PMH 2.0)UAB self-hosts the journal platform on which its scholarly journals are published, and each journal exposes...25.1PubMed Central OA APIThe PMC Open Access API provides citation data, license information, and download links for Open Access art...25.0Repository@Nottingham DSpace REST APIKeyless, read-only HAL+JSON REST API of the university's self-hosted DSpace 8.2 / DSpace-CRIS (cris-2024.02...24.7Repository@Nottingham OAI-PMH (DSpace, institution-hosted)OAI-PMH 2.0 metadata-harvesting provider of the institution-hosted DSpace repository. Verified live 2026-08...24.7Repository@Nottingham OAI-PMH (Worktribe tenant)OAI-PMH 2.0 interface for the Worktribe-hosted Repository@Nottingham research-outputs showcase. Confirmed l...24.7Archive ouverte UNIGE OAI-PMHOAI-PMH 2.0 metadata-harvesting interface for the Archive ouverte UNIGE institutional repository, exposing ...24.6ACM Digital Library Content Retrieval APIIndividual publications, conference papers, and journal articles in the ACM Digital Library are accessible ...24.1TUdatalib DSpace REST APIREST API of TUdatalib, the institutional research-data repository of TU Darmstadt. Verified live 2026-09-01...24.1TUjournals REST API (Janeway tenancy)TUjournals is TU Darmstadt's open-access journal platform, publisher of record "Universitaets- und Landesbi...24.1tuprints OAI-PMH (EPrints)tuprints is the open-access publication repository of TU Darmstadt, on the institution's own host and regis...24.1St Andrews Research Repository OAI-PMHOAI-PMH 2.0 endpoint for the DSpace-based St Andrews Research Repository, the University's open-access repo...23.8ERA — Education and Research Archive (on Scholaris)ERA is the University of Alberta's institutional repository. It was the library's own Samvera/Hyrax applica...23.7Bern Open Publishing (BOP Serials) OAI-PMH EndpointOAI-PMH 2.0 endpoint for Bern Open Publishing, the University Library's diamond open-access journal platfor...23.6BORIS Portal OAI-PMH EndpointOAI-PMH 2.0 metadata-harvesting endpoint for BORIS Portal, the University of Bern's institutional repositor...23.6Waseda University Repository (OAI-PMH)OAI-PMH 2.0 metadata harvesting for the Waseda University Repository. The collection, the administrative co...23.6eDeposit Ireland — OAI-PMH and DSpace RESTIreland's national legal-deposit digital repository, administered by the Library of Trinity College Dublin ...23.2TARA OAI-PMH (Trinity's Access to Research Archive)TARA is Trinity's open-access institutional repository, a DSpace deployment on Trinity's own host (www.tara...23.2RITEC Institutional Repository — DSpace REST APIRITEC (repositorio.tec.mx) is the institution's DSpace 8.0 institutional repository, holding 86,310 discove...23.0RITEC Institutional Repository — OAI-PMH EndpointOAI-PMH 2.0 endpoint for RITEC, verified live on 2026-09-01. Identify returns repositoryName "Repositorio I...23.0Sydney eScholarship Repository (institutional repository, OAI-PMH)Sydney eScholarship is the university's own institutional repository, running on the university-owned usyd....22.9CaltechAUTHORS REST API and OAI-PMHCaltech's institutional publications repository, also on self-hosted InvenioRDM. Exposes the same REST reco...22.4Scholarship@Western OAI-PMH 2.0 provider (tenant)OAI-PMH 2.0 metadata harvesting for Western University's Open Repository. Identify returns repositoryName "...22.3Scholarship@Western on Scholaris — DSpace REST API (tenant)The HAL+JSON REST API of Western University's Open Repository, reachable anonymously at https://uwo.scholar...22.3Adelaide Research & Scholarship OAI-PMHOAI-PMH 2.0 metadata harvesting endpoint for the "Adelaide Research & Scholarship" repository, on the same ...22.2Adelaide Research & Scholarship REST APIDSpace 7.6.1 HAL/JSON REST API for the University of Adelaide institutional repository "Adelaide Research &...22.2HAL Search API — SORBONNE-UNIVERSITE collectionThe HAL Solr search API scoped to Sorbonne University's collection at https://api.archives-ouvertes.fr/sear...22.2HAL Sorbonne Universite Open Archive — OAI-PMH (Sorbonne scope)Sorbonne University's open archive of scholarly publications, harvestable over OAI-PMH 2.0 at the Sorbonne-...22.2jMorp GraphQL API (Tohoku Medical Megabank Organization)Public, anonymous, read-only GraphQL API for jMorp — the Japanese Multi Omics Reference Panel published by ...22.2TOUR Institutional Repository OAI-PMHOAI-PMH 2.0 metadata harvesting endpoint for TOUR (TOhoku University Repository). The collection, the depar...22.2Knowledge Bank DSpace REST APIREST API for the Knowledge Bank, Ohio State University Libraries' DSpace 7.6 institutional repository. Expo...22.1Knowledge Bank OAI-PMH InterfaceOAI-PMH 2.0 metadata harvesting endpoint for the Knowledge Bank institutional repository, supporting the st...22.1Aarhus University OAI-PMH Metadata ServiceOpen Archives Initiative Protocol for Metadata Harvesting 2.0 service for Aarhus University's research reco...21.8NTNU Open Access Journals OAI-PMHNTNU runs its own Open Journal Systems installation, "NTNU Open Access Journals", on its own registrable do...21.8NVA National Research Archive (NTNU Open successor)Nasjonalt vitenarkiv (NVA) is the Sikt-operated national open research archive that absorbed NTNU's institu...21.8VU Research Portal OAI-PMHOAI-PMH 2.0 metadata harvesting interface for the Vrije Universiteit Amsterdam Repository, served from the ...21.6Riviste Online SApienza (R.O.SA) OAI-PMHSite-wide OAI-PMH 2.0 provider over Riviste Online SApienza, the university's open-access journal publishin...21.4Docta Complutense Repository API (DSpace 7)Docta Complutense is UCM's open-access institutional repository, migrated in 2023 to DSpace 7 and self-host...21.1USC Figshare Research Repository (Tenant)USC Libraries offers Figshare to USC researchers as its data-output repository for datasets, posters and pr...21.1Scholarly Commons @ CWRU — OAI-PMH 2.0 providerAn open OAI-PMH 2.0 metadata provider on CWRU's own host. Identify reports repositoryName "Scholarly Common...20.9University of Sussex Research Data Repository (Figshare tenant)Sussex's institutional research repository, a Figshare tenant at sussex.figshare.com (CNAME to figshare.com...20.9AURA DSpace REST API (tenancy on Edinburgh IS infrastructure)The Aberdeen University Research Archive (AURA) runs DSpace 8.1-SNAPSHOT and exposes a public HATEOAS REST ...20.7AURA OAI-PMH Metadata Harvesting (tenancy on Edinburgh IS infrastructure)AURA's OAI-PMH 2.0 endpoint, repositoryName "Aura", repositoryIdentifier aura.abdn.ac.uk, adminEmail aura-m...20.7Elsevier Pure CRIS tenancy (research portal, REST + OAI-PMH)The University's tenancy of Elsevier Pure, its current research information system, published as "The Unive...20.7IRIS UNIPD OAI-PMHOAI-PMH 2.0 harvesting endpoint for IRIS UNIPD, the University of Padua's institutional research catalogue ...20.7Padua Theses and Dissertations OAI-PMHOAI-PMH 2.0 harvesting endpoint for the University of Padua theses and dissertations archive. Live and anon...20.7Research Data Unipd OAI-PMHOAI-PMH 2.0 harvesting endpoint for Research Data Unipd, the EPrints-based research-data archive of the Uni...20.7Queen Mary Research Online (QMRO) — DSpace 8.4 REST APIQueen Mary's open-access institutional repository runs DSpace 8.4 and exposes the standard DSpace REST API ...20.5HAL OAI-PMH — ens-lyon collectionOAI-PMH 2.0 harvesting endpoint scoped to ENS de Lyon's named collection on HAL, the French national open a...20.3HAL Search API — ens-lyon collectionHAL's Solr-backed search API scoped to the ENS de Lyon collection. A probe of /search/ens-lyon/?q=*:*&wt=js...20.3HAL-ENS Open Archive — ENS-PARIS collectionENS research output is deposited into the ENS-PARIS collection of HAL, the French national open archive ope...20.3ZORA DSpace REST APIZORA runs DSpace 8.0 and exposes the standard DSpace REST API (application/hal+json) for programmatic disco...20.3ZORA Repository OAI-PMHThe Zurich Open Repository and Archive (ZORA) is UZH's institutional repository for the peer-reviewed resea...20.3Loughborough University Library Catalogue API (Koha)The REST API of Loughborough University Library's Koha integrated library system, served from the universit...20.2Loughborough University Research Repository (figshare tenancy)The Loughborough Research Repository is the university's institutional repository for all research outputs,...20.2OpenBU Repository — OAI-PMH and DSpace REST (Atmire-operated)OpenBU is Boston University Libraries' open-access institutional repository. The content, the collections a...20.2UTM Institutional Repository (UTM-IR) EPrints OAI-PMH — unreachableThe older EPrints institutional repository, registered with ROAR (record 1358), OpenDOAR and Sherpa (record...19.8UTM Press Journals (Open Journal Systems) — OAI-PMHPenerbit UTM Press runs the university's journal estate on PKP Open Journal Systems at journals.utm.my (161...19.8UTMIK Repository (DSpace-CRIS) — OAI-PMH and RESTUTM's institutional knowledge repository, running DSpace-CRIS on utmik.utm.my (161.139.22.165, inside UTM's...19.8HUSCAP XML SitemapsPublicly crawlable XML sitemap index for HUSCAP, the Hokkaido University Collection of Scholarly and Academ...19.7JaLC DOI Prefix 10.14943Hokkaido University registers DOIs through JaLC, the Japan Link Center, under prefix 10.14943. Confirmed fr...19.7DADUN Institutional Repository (OAI-PMH)DADUN (Deposito Academico Digital de la Universidad de Navarra) is the university's open-access institution...19.3AUB ScholarWorks DSpace REST APIAnonymous HAL/JSON REST API for AUB ScholarWorks, AUB's institutional repository, running DSpace 9.1 on AUB...19.1AUB ScholarWorks OAI-PMHOAI-PMH 2.0 metadata harvesting endpoint for AUB ScholarWorks. Identify returns repositoryName "AUB Scholar...19.1IIT Delhi Institutional Repository DSpace REST APIThe IIT Delhi Central Library institutional repository runs on DSpace 8.0 and exposes the standard DSpace R...19.1IIT Delhi Institutional Repository OAI-PMHOAI-PMH 2.0 metadata-harvesting interface for the IIT Delhi DSpace 8 institutional repository, on the insti...19.1UPF Digital Repository OAI-PMH EndpointOAI-PMH 2.0 metadata harvesting endpoint for e-Repositori, on UPF's own host. Probed 2026-09-01: verb=Ident...19.1UPF Digital Repository REST API (DSpace 7)e-Repositori (Repositori digital de la UPF) is UPF's open-access institutional repository, self-hosted on U...19.1QSpace Institutional Repository (Open Repository tenant)QSpace is Qatar University's institutional repository — 66,950 records, DSpace 7.6, administered by Qatar U...19.0King Abdulaziz University Journals (Digital Commons tenancy)KAU's Scientific Publishing Centre journals delivered on Elsevier's Digital Commons (bepress) platform, wit...18.9OUR Archive OAI-PMH Metadata — Ex Libris Esploro tenancyOUR Archive (Otago University Research Archive) is the University's institutional research repository. The ...18.6UCL Discovery — OAI-PMHUCL Discovery is UCL's open-access institutional repository of research outputs, running EPrints on UCL's o...18.3AlmaDL Journals OAI-PMHSite-wide OAI-PMH 2.0 provider over AlmaDL Journals, the university's open-access journal publishing platfo...18.2AMS Acta Institutional Repository OAI-PMHOAI-PMH 2.0 metadata-harvesting provider for AMS Acta, the AlmaDL institutional research repository, self-h...18.2AMS Tesi di Dottorato (Doctoral Theses) OAI-PMHSecond, distinct OAI-PMH 2.0 provider run by AlmaDL over AMS Tesi di Dottorato, the university's doctoral t...18.2AMS Tesi di Laurea (Graduate Theses) OAI-PMHThird AlmaDL OAI-PMH 2.0 provider, over AMS Tesi di Laurea, the university's graduate and undergraduate the...18.2TU/e Research Portal OAI-PMHLive OAI-PMH 2.0 harvesting interface for the TU/e Research Portal, served by Elsevier Pure at TU/e's own p...18.0DiVA Institutional Repository (OAI-PMH)Stockholm University's publication records are harvestable over OAI-PMH 2.0 from its DiVA instance at su.di...17.8Stockholm University Research Data Repository (Figshare tenancy)su.figshare.com is Stockholm University's research data repository, running on Figshare. The data, the DOIs...17.8Biblos-e Archivo OAI-PMH EndpointOAI-PMH 2.0 metadata-harvesting endpoint for Biblos-e Archivo. Identify returns repositoryName "Biblos-e Ar...16.9Biblos-e Archivo REST API (DSpace 7)HAL-based REST API for Biblos-e Archivo, UAM's institutional repository, running DSpace 7.6.5. Anonymously ...16.9Portal de Revistas Electrónicas de la UAM — OAI-PMH EndpointOAI-PMH 2.0 endpoint over the university's Open Journal Systems 3.3.0.6 installation, which hosts UAM's ele...16.9Crossref membership — Edicions de la Universitat de Barcelona (member 17854)The University of Barcelona press is a Crossref member in its own right: member id 17854, DOI prefixes 10.1...15.4Revistes Científiques de la UB (OJS) — OAI-PMH 2.0Open Journal Systems platform self-hosted by UB at revistes.ub.edu, publishing the university's scholarly j...15.4UI Scholars Hub OAI-PMH (bepress Digital Commons tenant)OAI-PMH 2.0 metadata-harvesting interface for UI Scholars Hub, the university's institutional research repo...15.4Repositorio Académico DSpace REST APIThe DSpace 6 REST API on the University of Chile institutional repository, not catalogued before this run. ...15.1Repositorio Académico OAI-PMHOAI-PMH 2.0 provider on the University of Chile institutional repository (Repositorio Académico), managed b...15.1Canterbury Figshare Research Data Repository (tenant)canterbury.figshare.com is the University of Canterbury's institutional research data repository, a tenancy...15.0UC Research Repository OAI-PMHOAI-PMH 2.0 metadata harvesting interface for the UC Research Repository, a self-hosted DSpace 7 institutio...15.0OPAL (Open @ La Trobe) Research RepositoryOPAL is La Trobe's open-access research repository — its publications, theses, datasets and DOIs — deployed...14.7Queen's University Belfast Research Portal — DataCite repository clientQueen's University Belfast is a DataCite consortium organization (provider jxtg) and has operated a registe...14.2Queen's University Belfast Research Portal — OAI-PMH harvesting endpointLive OAI-PMH 2.0 metadata harvesting endpoint for the QUB Research Portal. Identify returns repositoryName ...14.2CityUHK Scholars OAI-PMHPublic OAI-PMH 2.0 endpoint for CityUHK Scholars, the university's research information system and institut...12.7RMIT Research Repository (Esploro)The RMIT Research Repository is RMIT University's open access research portal, powered by Clarivate's Esplo...12.3Bridges — Monash Research Repository (Figshare tenant)Monash's institutional research data repository, "Bridges", operating on the Figshare platform. bridges.mon...12.2Open Research Newcastle (Figshare) — TENANTThe university's open-access institutional repository and research-data store, running on the Figshare plat...11.4
Minimal 8 Almost no public developer surface
GeoCat bv OGC API - FeaturesA modern OGC API - Features endpoint alongside the classic OGC web services. Verified anonymously on 2026-0...5.3GeoCat bv OGC Web Services (WMS / WFS)OGC-standard web services served from a GeoServer instance. Verified anonymously on 2026-08-20: a WMS 1.3.0...5.3GeoSolutions OGC API - FeaturesA modern OGC API - Features endpoint alongside the classic OGC web services. Verified anonymously on 2026-0...5.3GeoSolutions OGC Web Services (WMS / WFS)OGC-standard web services served from a GeoServer instance. Verified anonymously on 2026-08-20: a WMS 1.3.0...5.3Deutscher Wetterdienst OGC Web Services (WMS / WFS)OGC-standard web services served from a GeoServer instance. Verified anonymously on 2026-08-20: a WMS 1.3.0...3.4Eurac Research OGC Web Services (WMS / WFS)OGC-standard web services served from a GeoServer instance. Verified anonymously on 2026-08-20: a WMS 1.3.0...3.4Flanders Marine Institute OGC Web Services (WMS / WFS)OGC-standard web services served from a GeoServer instance. Verified anonymously on 2026-08-20: a WMS 1.3.0...3.4Spacebel s.a OGC Web Services (WMS / WFS)OGC-standard web services served from a GeoServer instance. Verified anonymously on 2026-08-20: a WMS 1.3.0...3.4

Companies reaching this through an API (55)

These companies publish an API, specification or operation carrying “Open Access” but do not classify their business under it. Listed unranked and kept out of the count above, because one tagged operation is not a statement about what a company does.

Aalto University California Institute of Technology Canonical Cardiff University Case Western Reserve University City University of Hong Kong Columbia University Complutense University of Madrid Eindhoven University of Technology Emory University ExchangeRate-API Harvard University IEEE Xplore Indian Institute of Technology Bombay Johns Hopkins University King Abdulaziz University KU Leuven McGill University Monash University National Institutes of Health (NIH) PJM Interconnection Politecnico di Torino PubMed Tecnológico de Monterrey UCLouvain United Arab Emirates University Universitat Pompeu Fabra University of Adelaide University of Alberta University of Auckland University of Bonn University of California, Berkeley University of California, Davis University of California, San Francisco University of California, Santa Barbara University of Cape Town University of Exeter University of Geneva University of Gothenburg University of Helsinki University of Indonesia University of Leeds University of Manchester University of Minnesota University of Newcastle Australia University of Pennsylvania University of Southern California University of Sydney University of Texas at Austin University of Warsaw
Show all 55 companies ↓
University of Washington University of Waterloo University of Wisconsin-Madison Vanderbilt University Washington University in St. Louis

Score breakdown

Frequency
64.1
log-scaled weighted occurrences
Breadth
1.8
spread across providers
Quality lift
26.4
mean composite of providers using it
Cohesion
68.3
strength of nearest seed neighbor

Related tags

OAI-PMH 152 co-occurrences University 159 co-occurrences Research Data 129 co-occurrences Shibboleth 118 co-occurrences SAML 145 co-occurrences Identity Federation 152 co-occurrences Research Repository 110 co-occurrences Higher Education 160 co-occurrences

Where this tag comes from

Api tag231
Provider tag140
Openapi tag1
Openapi op tag2

Markets provisional

Kin Score markets whose measured providers carry this tag. Share is the fraction of the market's measured providers that carry it — it describes the market, not this tag.

MarketShare of the market's providers
Higher Education and Research26%

Cohort brief

Auto-generated

The 140 providers in the APIs.io catalog tagged Open Access, scored on the Kin Score. Every figure below is computed from the catalog — nothing here is written.

Providers
140
all scored
Mean Kin Score
26.4
+2.3 vs catalog 24.1
Mean Agent Readiness
15
+0.9 vs catalog 14.1
Spread
3.4–49.4
median 26.4 · σ 10.4
How the 140 split by band
Exemplar 0Strong 0Developing 15Thin 57Emerging 56Minimal 12
Facet averages, against the whole catalog
FacetThis cohortCatalogDifferenceScored
Contract Quality 28.2 18.6 +9.6 140
Discoverability 65.8 59.1 +6.7 140
Contract Governance 12.3 9.7 +2.6 140
Developer Ergonomics 25.6 24.5 +1.1 140
Operational Transparency 12.5 13.2 -0.7 140
Access Clarity 21.6 30 -8.4 140

A facet is averaged over the members that carry it, not over the whole cohort — the “Scored” column is that count. Averaging an absent facet as zero would score our own coverage gaps as the providers’ posture.

What this cohort publishes
ArtifactThis cohortCatalogDifference
MCP server (any) 2% 18% -16
MCP server (first-party) 2% 16% -14
Agent Skills 0% 0% 0
OAuth scopes 21% 13% +8
Security 96% 99% -3
Arazzo workflows 0% 1% -1
Governance rules 54% 36% +18

mcp_pct counts any mcp/ artifact including ones API Evangelist derived from the provider OpenAPI; mcp_first_party_pct counts only servers the provider publishes. Prefer the latter.

Top by Kin Score
  1. 1 Uppsala University 49.4
  2. 2 Delft University of Technology 47.8
  3. 3 Pennsylvania State University 46.5
  4. 4 University of Cambridge 45.6
  5. 5 DeSci Labs 45.3
  6. 6 arXiv 44.3
  7. 7 RWTH Aachen University 44.3
  8. 8 University of Tokyo 44.3
  9. 9 Dryad 44.1
  10. 10 Hamad Bin Khalifa University 40.8
Top by Agent Readiness
  1. 1 DeSci Labs 52.1
  2. 2 Carnegie Mellon University 34.4
  3. 3 Semantic Scholar 33.9
  4. 4 Unpaywall 33.1
  5. 5 Massey University 32.8
  6. 6 University of Ottawa 32.7
  7. 7 Smithsonian Institution 32
  8. 8 University of Tokyo 31.7
  9. 9 University of Oxford 31.3
  10. 10 Dryad 31
All 140 members of this roster resolve to a scored provider in the catalog.
Coverage caveat. 107 of 140 scored members had under half their catalog-attributable points satisfied at all (catalog_earned / catalog_max < 0.5). They are INCLUDED in the mean above. A large share here means the cohort mean is partly a measurement of how far our enrichment reached, not only of how these providers publish.Generated from the catalog build of 14 November 2026, across 41591 providers, using the same computation served by the APIs.io cohort API. Briefs are published for rosters of 5 or more scored providers; below that a distribution is not meaningful.

Work with this as data

Every tag here is available over the APIs.io API and to AI agents over MCP.

MCP server

One button, every client — Claude, Cursor, VS Code and the rest.

https://apis.io/mcp

Tools for tags

7 MCP tools reach this
  • find_tagsBrowse and filter every tag in the catalog.
  • get_cohortThis tag as a scored cohort — every provider carrying it, with scores.
  • cohort_statsPRO — the distribution across this tag: mean, median, band split, adoption rates.
  • cohort_rankingsPRO — the leaderboard, on composite AND agent-readiness axes.
  • apis_io_searchSTART HERE — APIs, providers and tags for one query, each with its total.
  • resolveTurn a domain, URL or GitHub org into the provider it belongs to.
  • find_cohortsEvery scored population of providers in the catalog.
All 92 tools →

Call it yourself

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This tag 
curl "https://apis.io/api/v1/tags/open-access"
All tags 
curl "https://apis.io/api/v1/tags?limit=25"
As a scored cohort (paid plan)
The distribution (Pro)

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