canonical · 1.9 market industry

Open Access

Score 32.5 / 100 135 providers 152 APIs Search apis.io →
Variants seen in the corpus: Open Accessopen accessopen-access

Providers using this tag (135)

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

Strong 2 Solid coverage with minor gaps
Delft University of TechnologyUniversityHigher EducationEducationTechnical University3 APIs62.4ExchangeRate-APICurrency ExchangeForeign ExchangeFinancial DataForex7 APIs55.2
Developing 27 Usable, with meaningful gaps to close
University of CambridgeEducationHigher EducationUniversityResearch12 APIs53.1FigshareResearch DataData RepositoryOpen ScienceDOI10 APIs52.3PJM InterconnectionEnergyUnited StatesEnergy MarketsElectricity6 APIs52.1Seoul National UniversityUniversityHigher EducationEducationSouth Korea5 APIs50.6LandgateReal-EstateAustraliaLand RegistryTitle4 APIs49.9Australian National UniversityUniversityHigher EducationEducationResearch6 APIs48.8DeSci LabsCompanyAi Enterprise SoftwareResearch InfrastructureDecentralized Science3 APIs48.5University of ManchesterUniversityHigher EducationEducationResearch5 APIs47.8University of TokyoUniversityHigher EducationEducationJapan5 APIs47.7arXivScience And MathScholarly PublishingPreprints4 APIs47.4DryadResearch DataOpen ScienceData RepositoryDatasets7 APIs46.9University of Hong KongEducationHigher EducationUniversityHong Kong7 APIs44.5Harvard UniversityUniversityHigher EducationEducationUnited States14 APIs44.4IEEE XploreScience And MathScholarly PublishingEngineeringComputer Science5 APIs43.6Loughborough UniversityEducationHigher EducationUniversityUnited Kingdom11 APIs42.0University of CanterburyEducationHigher EducationUniversityResearch13 APIs41.8Erasmus University RotterdamEducationHigher EducationUniversityResearch Data12 APIs41.7Smithsonian InstitutionMuseumsCultural HeritageCollection3 APIs41.6EPFLUniversityHigher EducationEducationTechnical University9 APIs41.5University of OxfordUniversityHigher EducationEducationResearch10 APIs41.1Hamad Bin Khalifa UniversityEducationHigher EducationUniversityResearch11 APIs41.0National Institutes of Health (NIH)BiomedicalResearchPubMedClinical Trials15 APIs41.0University of SheffieldEducationHigher EducationUniversityResearch Data12 APIs40.8University of CalgaryEducationHigher EducationUniversityResearch16 APIs40.3University of Newcastle AustraliaEducationHigher EducationUniversityResearch10 APIs40.1National University of SingaporeUniversityHigher EducationEducationSingapore8 APIs39.8Stockholm UniversityEducationHigher EducationUniversityResearch12 APIs39.5
Thin 41 Limited public surface area
National Center for Biotechnology Information (NCBI)BioinformaticsGenomicsLife SciencesPubMed14 APIs38.6RWTH Aachen UniversityEducationHigher EducationUniversityResearch Data49 APIs38.5King Fahd University of Petroleum & MineralsEducationHigher EducationUniversityResearch38 APIs38.2University of SussexEducationHigher EducationUniversityResearch11 APIs37.8École Normale Supérieure de ParisEducationHigher EducationUniversityResearch4 APIs37.4University of BaselEducationHigher EducationUniversitySwitzerland9 APIs37.1Utrecht UniversityEducationHigher EducationUniversityNetherlands21 APIs37.0Springer NatureAcademic PublishingResearchScholarly Content4 APIs36.7Norwegian University of Science and TechnologyEducationHigher EducationUniversityResearch39 APIs36.4Uppsala UniversityEducationHigher EducationUniversityResearch9 APIs35.8University of California, BerkeleyUniversityHigher EducationEducationPublic Research University8 APIs35.0University of PennsylvaniaEducationHigher EducationUniversityResearch University10 APIs34.8Cornell UniversityUniversityHigher EducationEducationIvy League6 APIs34.7Imperial College LondonUniversityHigher EducationEducationRussell Group5 APIs34.4Eindhoven University of TechnologyEducationHigher EducationUniversityResearch38 APIs34.0University of ZurichEducationHigher EducationUniversitySwitzerland5 APIs34.0University College DublinEducationHigher EducationUniversityIreland9 APIs33.9Nekosia APIAnimenekonekosneko api1 API33.5University of GenevaEducationHigher EducationUniversityOpen Science5 APIs33.1Humboldt-Universität zu BerlinEducationHigher EducationUniversityResearch6 APIs33.0FatcatScholarlyResearchAcademic11 APIs32.7Queen's University BelfastEducationHigher EducationUniversityResearch38 APIs32.5ACM Digital LibraryAcademicBibliographic RecordsCitationsComputing3 APIs32.4CrossrefCitationsDOIFundersIdentifiers8 APIs32.1University of St AndrewsEducationHigher EducationUniversityResearch5 APIs32.0TU DresdenEducationHigher EducationUniversityResearch9 APIs31.8PubMedBiomedicalLife ScienceResearchLiterature10 APIs31.7University of WashingtonEducationHigher EducationUniversityResearch29 APIs31.5bioRxivBiologyPreprintsResearch7 APIs31.3Victoria University of WellingtonEducationHigher EducationUniversityResearch4 APIs31.1University of BirminghamEducationHigher EducationUniversityUnited Kingdom4 APIs30.8Indian Institute of Science BangaloreEducationHigher EducationUniversityResearch5 APIs30.3University of Cape TownEducationHigher EducationUniversityResearch Data7 APIs30.3Indian Institute of Technology KanpurEducationHigher EducationUniversityResearch64 APIs30.1UCLouvainEducationHigher EducationUniversityOpen Data39 APIs29.3University of YorkEducationHigher EducationUniversityUnited Kingdom2 APIs29.2medRxivHealth SciencesPreprintsResearch3 APIs28.3Tecnológico de MonterreyEducationHigher EducationUniversityOpen Data25 APIs28.3University of SydneyUniversityHigher EducationEducationAustralia7 APIs27.9UnpaywallScholarly ArticlesResearchAcademic2 APIs26.9University of ChileEducationHigher EducationUniversityResearch Data25 APIs26.7
Emerging 65 Early or largely undocumented
Université de MontréalEducationHigher EducationUniversityResearch38 APIs25.9Kyushu UniversityEducationHigher EducationUniversityResearch2 APIs25.3Indian Institute of Technology BombayEducationHigher EducationUniversityResearch3 APIs24.9Aalto UniversityEducationHigher EducationUniversityResearch4 APIs23.9Universiti Putra MalaysiaEducationHigher EducationUniversityResearch2 APIs23.4Friedrich-Alexander-Universität Erlangen-NürnbergEducationHigher EducationUniversityResearch3 APIs23.0Universiti Teknologi MalaysiaEducationHigher EducationUniversityResearch1 API22.9Technical University of DarmstadtEducationHigher EducationUniversityResearch Data4 APIs22.7American University of BeirutEducationHigher EducationUniversityLebanon3 APIs22.2Technical University of BerlinEducationHigher EducationUniversityResearch Data3 APIs22.2University of GlasgowEducationHigher EducationUniversityResearch2 APIs22.2Keio UniversityEducationHigher EducationUniversityResearch1 API21.5Nagoya UniversityEducationHigher EducationUniversityResearch1 API21.5Indian Institute of Technology DelhiEducationHigher EducationUniversityResearch4 APIs21.3Waseda UniversityEducationHigher EducationUniversityResearch3 APIs21.3Trinity College DublinEducationHigher EducationUniversityIreland2 APIs21.2University of OtagoEducationHigher EducationUniversityResearch2 APIs21.2Autonomous University of MadridEducationHigher EducationUniversitySpain2 APIs21.0Universiti Teknologi PETRONASEducationHigher EducationUniversityResearch1 API21.0Tokyo Institute of TechnologyEducationHigher EducationUniversityJapan2 APIs20.8UCLEducationHigher EducationUniversityUnited Kingdom6 APIs20.8Universität HamburgEducationHigher EducationUniversityGermany2 APIs20.8Politecnico di MilanoEducationHigher EducationUniversityResearch3 APIs20.6University of Texas at AustinEducationHigher EducationUniversityResearch3 APIs20.1Western UniversityEducationHigher EducationUniversityCanada2 APIs20.1TU WienEducationHigher EducationUniversityResearch Data3 APIs19.9Universitat Pompeu FabraEducationHigher EducationUniversityOpen Data4 APIs19.9University of BolognaEducationHigher EducationUniversityOpen Data2 APIs19.5University of AberdeenEducationHigher EducationUniversityResearch2 APIs19.3Complutense University of MadridEducationHigher EducationUniversityOpen Data4 APIs19.2Sorbonne UniversityEducationHigher EducationUniversityOpen Science3 APIs19.2Karlsruhe Institute of TechnologyEducationHigher EducationUniversityResearch4 APIs18.9Ohio State UniversityEducationHigher EducationUniversityResearch3 APIs18.9University of BernEducationHigher EducationUniversitySwitzerland3 APIs18.9University of HelsinkiEducationHigher EducationUniversityFinland3 APIs18.9University of NottinghamEducationHigher EducationUniversityResearch2 APIs18.6University of OttawaEducationHigher EducationUniversityCanada2 APIs18.6University of ReadingEducationHigher EducationUniversityResearch2 APIs18.6École Normale Supérieure de LyonEducationHigher EducationUniversityFrance4 APIs18.2Universiti Sains MalaysiaEducationHigher EducationUniversityResearch2 APIs17.9Heriot-Watt UniversityEducationHigher EducationUniversityScotland2 APIs17.7University of IndonesiaEducationHigher EducationUniversityIndonesia2 APIs17.7Leiden UniversityEducationHigher EducationUniversityNetherlands1 API17.6Qatar UniversityEducationHigher EducationUniversityQatar2 APIs17.6Tohoku UniversityEducationHigher EducationUniversityResearch1 API17.6United Arab Emirates UniversityEducationHigher EducationUniversityResearch2 APIs17.6University of LisbonEducationHigher EducationUniversityPortugal2 APIs17.6University of LiverpoolEducationHigher EducationUniversityResearch2 APIs17.6Chulalongkorn UniversityEducationHigher EducationUniversityThailand3 APIs17.3University of WaikatoEducationHigher EducationUniversityResearch5 APIs17.3Université libre de BruxellesEducationHigher EducationUniversityResearch3 APIs17.3École des Ponts ParisTechEducationHigher EducationUniversityEngineering3 APIs17.3McMaster UniversityEducationHigher EducationUniversityCanada2 APIs17.2University of WollongongEducationHigher EducationUniversityAustralia2 APIs17.2Hokkaido UniversityEducationHigher EducationUniversityResearch1 API17.0Massey UniversityEducationHigher EducationUniversityResearch2 APIs17.0Universiti Kebangsaan MalaysiaEducationHigher EducationUniversityResearch2 APIs17.0University of Los Andes ColombiaEducationHigher EducationUniversityColombia2 APIs17.0University of NavarraEducationHigher EducationUniversitySpain1 API17.0University of GothenburgEducationHigher EducationUniversitySweden2 APIs16.7Autonomous University of BarcelonaEducationHigher EducationUniversitySpain2 APIs16.0Queen Mary University of LondonEducationHigher EducationUniversityResearch15.8RMIT UniversityEducationHigher EducationUniversityResearch Data1 API15.7AcademiaCompanyAcademic Researchresearch-papersScholarly Publishing14.4PLOSScientific ArticlesResearchSearchSolr1 API13.8

APIs with this tag (142)

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 →

Strong 1 Solid coverage with minor gaps
ExchangeRate-API Open Access APIFree no-key endpoint with once-daily rates and attribution requirement.55.2
Developing 21 Usable, with meaningful gaps to close
Apollo Institutional Repository API (DSpace)Cambridge's open-access research repository (Apollo) on the DSpace platform, exposing OAI-PMH metadata harv...53.1PJM Messages Public Web ServiceThe only fully anonymous PJM REST API found on the public surface. It backs the PJM Upcoming Changes page a...52.1S-Space OAI-PMH Repository InterfaceOAI-PMH 2.0 metadata harvesting for S-Space, the SNU Open Repository and Archive. Verified live and anonymo...50.6SLIP Public OGC Web Services (WMS / WFS)OGC-standard web services fronting the same SLIP public data. A WMS 1.3.0 GetCapabilities document (56 laye...49.9SLIP Public Services (ArcGIS REST)The public tier of Landgate's Shared Location Information Platform (SLIP), served as an Esri ArcGIS Server ...49.9ANU Open Research OAI-PMHOAI-PMH 2.0 metadata harvesting interface for ANU's Open Research institutional repository. Confirmed live:...48.8HKU Scholars Hub OAI-PMHHKU Scholars Hub is the University's DSpace-based open-access institutional repository and current research...44.5Harvard DASH institutional repository (4Science-managed DSpace)DASH (Digital Access to Scholarship at Harvard) is Harvard's open-access institutional repository of 58,000...44.4IEEE Xplore Open Access APIFull-text retrieval endpoint for articles designated as IEEE Open Access or chargeable open content. Return...43.6Loughborough Research Repository OAI-PMHOAI-PMH metadata harvesting endpoint for the Loughborough Research Repository, served via figshare and scop...42.0UC Research Repository OAI-PMHOAI-PMH 2.0 metadata harvesting interface for the UC Research Repository, a DSpace 7 institutional reposito...41.8RePub OAI-PMH Metadata FeedOAI-PMH 2.0 metadata harvesting interface for RePub, the Erasmus University institutional repository. Verif...41.7EPFL Infoscience Institutional RepositoryInfoscience is EPFL's institutional repository and CRIS, self-hosted on EPFL infrastructure and running DSp...41.5Figshare OAI-PMH (Manara - HBKU Research)Figshare exposes an OAI-PMH v2.0 metadata harvesting endpoint that provides access to public article metada...41.0PubMed Central (PMC) OA APIAPIs for programmatic access to PubMed Central's Open Access content, including file validation, Open Acces...41.0White Rose eTheses Online OAI-PMHWhite Rose eTheses Online (WREO) is the shared electronic theses repository for the Universities of Leeds, ...40.8White Rose Research Online OAI-PMHWhite Rose Research Online (WRRO) is the shared open-access research repository for the Universities of Lee...40.8PRISM Institutional Repository (DSpace)PRISM is the University of Calgary's institutional repository, running on DSpace 8.3 (now served from ucalg...40.3ScholarBank@NUS DSpace REST APIThe HAL-style REST API of ScholarBank@NUS, the university's institutional repository — communities, collect...39.8ScholarBank@NUS OAI-PMH InterfaceOAI-PMH 2.0 metadata harvesting endpoint for ScholarBank@NUS, advertising twelve metadata formats including...39.8DiVA Institutional Repository (OAI-PMH)Stockholm University participates in DiVA (Academic Archive On-line), the shared Swedish publishing system ...39.5
Thin 35 Limited public surface area
PMC OAI-PMH ServiceThe PMC OAI-PMH (Open Archives Initiative Protocol for Metadata Harvesting) service allows bulk harvesting ...38.6PMC Open Access API (OA Service)The PubMed Central Open Access API retrieves citation data, licensing details, and FTP download locations f...38.6RWTH Publications OAI-PMHRWTH Publications is the institutional repository providing access to the publication output of RWTH Aachen...38.5KFUPM ePrints REST / SearchEPrints content and search URLs for the KFUPM ePrints repository. Individual records are addressable (e.g. ...38.2HAL Search / REST APIThe national HAL open-archive REST and Search API provides programmatic query access to publication metadat...37.4HAL-ENS Open Archive (OAI-PMH)HAL-ENS is the open archive hosting the scientific production of ENS Paris researchers, teacher-researchers...37.4edoc DSpace REST APIPublic DSpace REST API for "edoc", the open-access institutional repository of the University of Basel, run...37.1edoc OAI-PMHOAI-PMH 2.0 metadata harvesting interface for the University of Basel edoc repository. The Identify verb re...37.1Utrecht University Repository OAI-PMHOAI-PMH metadata harvesting interface for the Utrecht University Library DSpace institutional repository, e...37.0Springer Nature Open Access APIThe Open Access API from Springer Nature — 2 operation(s) for open access.36.7NVA Nasjonalt Vitenarkiv APIThe National Research Archive (Nasjonalt vitenarkiv, NVA) is the Sikt operated open research archive that n...36.4DiVA OAI-PMHDiVA (Academic Archive On-line) is Uppsala University Library's institutional repository for publications a...35.8eScholarship Repository and OAI-PMH (California Digital Library tenant)eScholarship is the University of California's open-access publishing platform and institutional repository...35.0TU/e Research Portal OAI-PMHOAI-PMH metadata-harvesting interface for the TU/e Research Portal, powered by Elsevier Pure. It exposes re...34.0ZORA DSpace REST APIFollowing its 2025 migration to DSpace 7+, ZORA exposes the standard DSpace REST API (HAL+JSON) for program...34.0ZORA Repository OAI-PMHThe Zurich Open Repository and Archive (ZORA) provides open, worldwide access to the peer-reviewed research...34.0Research Repository UCD (DSpace OAI-PMH / REST)Research Repository UCD is the institution's green open-access scholarly repository, built on DSpace-CRIS. ...33.9Archive ouverte UNIGE OAI-PMHOAI-PMH 2.0 metadata-harvesting interface for the Archive ouverte UNIGE institutional repository, exposing ...33.1edoc-Server OAI-PMH InterfaceOpen Archives Initiative Protocol for Metadata Harvesting (OAI-PMH 2.0) endpoint for the edoc institutional...33.0Queen's University Belfast Research Portal (Pure OAI-PMH)OAI-PMH metadata harvesting endpoint for the Queen's University Belfast Research Portal, the institutional ...32.5ACM Digital Library Content Retrieval APIIndividual publications, conference papers, and journal articles in the ACM Digital Library are accessible ...32.4Pure Research Portal OAI-PMHOAI-PMH (Open Archives Initiative Protocol for Metadata Harvesting) endpoint for the University of St Andre...32.0St Andrews Research Repository OAI-PMHOAI-PMH endpoint for the DSpace-based St Andrews Research Repository, the institution's open-access reposit...32.0OpARA Research Data RepositoryOpARA (Open Access Repository and Archive) is the research-data repository for researchers of TU Dresden an...31.8Qucosa OAI-PMH (TU Dresden Document Server)OAI-PMH 2.0 metadata harvesting interface for Qucosa, the document and publication server used by TU Dresde...31.8PubMed Central OA APIThe PMC Open Access API provides citation data, license information, and download links for Open Access art...31.7ResearchWorks Repository (DSpace REST + OAI-PMH)ResearchWorks is UW's institutional digital repository for disseminating text-based scholarly work produced...31.5Open Access Repository OAI-PMHOAI-PMH metadata harvesting feed for the Open Access Te Herenga Waka—Victoria University of Wellington rese...31.1ePapers OAI-PMHOAI-PMH metadata harvesting interface for the University of Birmingham ePapers EPrints repository, holding ...30.8UBIRA eTheses OAI-PMHOAI-PMH metadata harvesting interface for the University of Birmingham eTheses EPrints repository, providin...30.8ePrints@IISc OAI-PMHePrints@IISc is the open-access institutional repository of IISc research publications, established in 2002...30.3OpenUCT Institutional Repository OAI-PMHOpenUCT is the University of Cape Town's open access institutional repository, launched in 2014 and built o...30.3DIAL UCLouvain OAI-PMHDIAL (Digital Access to Libraries) is UCLouvain's institutional repository for research publications. It ex...29.3RITEC Institutional Repository OAI-PMH (DSpace)RITEC, the Tecnológico de Monterrey institutional repository (repositorio.tec.mx), is a DSpace platform hol...28.3Repositorio Academico OAI-PMHThe University of Chile institutional repository (Repositorio Academico), managed by SISIB and built on DSp...26.7
Emerging 85 Early or largely undocumented
Papyrus OAI-PMH EndpointOAI-PMH 2.0 metadata harvesting endpoint for Papyrus, the UdeM institutional repository (a DSpace/Scholaris...25.9Kyushu University Institutional Repository (QIR) OAI-PMHLive OAI-PMH 2.0 metadata harvesting interface for the Kyushu University Institutional Repository (QIR), ru...25.3DSpace Institutional Repository OAI-PMHThe IIT Bombay Central Library institutional repository is built on DSpace and exposes an OAI-PMH 2.0 metad...24.9Aaltodoc Repository (OAI-PMH and REST)Aaltodoc is Aalto University's DSpace-based institutional repository of theses, articles, conference public...23.9PSAS Institutional Repository OAI-PMHStandards-based OAI-PMH 2.0 metadata harvesting interface for the Universiti Putra Malaysia Institutional R...23.4OPEN FAU DSpace REST APIOPEN FAU is the institutional open-access publication repository of FAU, built on DSpace 7.4. Its REST/HAL ...23.0OPEN FAU OAI-PMH InterfaceOAI-PMH metadata harvesting interface for the OPEN FAU DSpace repository, supporting standard verbs (Identi...23.0UTM Institutional Repository (UTM-IR) OAI-PMHThe Universiti Teknologi Malaysia Institutional Repository (UTM-IR) is built on EPrints and exposes an OAI-...22.9TUdatalib DSpace REST APIREST API of TUdatalib, the institutional research-data repository of TU Darmstadt, running on DSpace 8.1. T...22.7tuprints OAI-PMH (EPrints)tuprints is the open-access publication repository of TU Darmstadt, built on EPrints with an OAI-PMH 2.0 in...22.7AUB ScholarWorks DSpace REST APIPublic RESTful (HAL) API for the AUB ScholarWorks institutional repository, running on DSpace 9.1. Exposes ...22.2AUB ScholarWorks OAI-PMHOAI-PMH 2.0 metadata harvesting endpoint for the AUB ScholarWorks institutional repository (DSpace 9.1). Su...22.2DepositOnce DSpace REST APIDSpace 8.1 REST/HAL API for the DepositOnce repository, exposing communities, collections, items, bitstream...22.2DepositOnce OAI-PMH InterfaceOpen Archives Initiative Protocol for Metadata Harvesting (OAI-PMH 2.0) endpoint for DepositOnce, the insti...22.2Enlighten Publications OAI-PMHOAI-PMH 2.0 metadata harvesting endpoint for Enlighten, the University of Glasgow's EPrints institutional r...22.2KOARA OAI-PMH Metadata APIKOARA (KeiO Associated Repository of Academic resources) is Keio University's institutional repository, rel...21.5NAGOYA Repository OAI-PMHOAI-PMH 2.0 metadata harvesting interface for the NAGOYA Repository, the Nagoya University institutional re...21.5IIT Delhi Institutional Repository DSpace REST APIThe IIT Delhi Central Library institutional repository runs on DSpace 8.0 and exposes the standard DSpace R...21.3IIT Delhi Institutional Repository OAI-PMHOAI-PMH 2.0 metadata-harvesting interface for the IIT Delhi DSpace 8 institutional repository, enabling har...21.3Waseda University Repository (OAI-PMH)OAI-PMH 2.0 metadata harvesting endpoint for the Waseda University institutional repository, hosted on the ...21.3OUR Archive OAI-PMH MetadataOUR Archive (Otago University Research Archive) is the University of Otago institutional research repositor...21.2TARA OAI-PMH (Trinity's Access to Research Archive)TARA is Trinity College Dublin's open-access institutional repository, built on DSpace. It exposes an OAI-P...21.2Biblos-e Archivo OAI-PMH EndpointOAI-PMH 2.0 metadata-harvesting endpoint for Biblos-e Archivo. Supports Identify, ListRecords, ListSets, an...21.0Biblos-e Archivo REST API (DSpace 7)HAL-based REST API for Biblos-e Archivo, the UAM institutional repository, running DSpace 7.6.5. Provides p...21.0UTPedia Institutional Repository (OAI-PMH)UTPedia ("UTP Electronic and Digital Intellectual Asset") is the UTP institutional repository running EPrin...21.0E-Dissertationen (ediss.sub.hamburg) OAI-PMHOAI-PMH metadata-harvesting interface for the DSpace-based institutional repository of electronic dissertat...20.8Open-Access-Portal Universität HamburgOpen Access discovery portal aggregating freely available publications, research data, teaching materials, ...20.8T2R2 Research Repository OAI-PMHOAI-PMH 2.0 metadata harvesting interface for T2R2, the Science Tokyo / Tokyo Tech Research Repository oper...20.8UCL Discovery — OAI-PMHUCL Discovery is UCL's open-access institutional repository of research outputs, running EPrints on UCL's o...20.8IRIS Re.Public@Polimi OAI-PMHPublic OAI-PMH 2.0 metadata harvesting endpoint for the IRIS Re.Public@Polimi institutional research reposi...20.6Scholaris (Scholarship@Western) DSpace REST APIDSpace 8.3 REST (HAL) API for Western University's Open Repository, Scholarship@Western, hosted on the nati...20.1Texas ScholarWorks DSpace REST APIPublic DSpace 8 REST API for Texas ScholarWorks, the UT Austin institutional repository of theses, disserta...20.1Texas ScholarWorks OAI-PMH EndpointOAI-PMH 2.0 metadata-harvesting endpoint for Texas ScholarWorks. An Identify request returns repositoryName...20.1reposiTUm OAI-PMHOAI-PMH metadata harvesting interface for reposiTUm, the open-access institutional repository of TU Wien, i...19.9UPF Digital Repository OAI-PMHOAI-PMH 2.0 metadata harvesting endpoint for the e-Repositori (Repositori digital de la UPF), enabling harv...19.9AMS Acta Institutional Repository (OAI-PMH)AMS Acta is the AlmaDL institutional repository of the University of Bologna, running on EPrints 3.4.x. It ...19.5AURA DSpace REST APIThe Aberdeen University Research Archive (AURA) runs DSpace 8.1 and exposes a public HATEOAS REST API for d...19.3AURA OAI-PMH Metadata HarvestingAURA provides an OAI-PMH 2.0 endpoint (repository name "Aura") for harvesting Dublin Core and other metadat...19.3Docta Complutense Institutional RepositoryDocta Complutense is UCM's open-access institutional repository, migrated in 2023 to DSpace 7. As a DSpace ...19.2HAL Search APIThe HAL Solr-based search API exposes structured queries over the HAL corpus, including publications affili...19.2HAL Sorbonne Université Open Archive (OAI-PMH)HAL Sorbonne Université is the institution's open archive of scholarly publications. Its metadata is harves...19.2BORIS Portal DSpace REST APIBORIS Portal is the institutional repository and research information system of the University of Bern, run...18.9BORIS Portal OAI-PMH EndpointOAI-PMH 2.0 harvesting endpoint for BORIS Portal, allowing metadata harvesting of the University of Bern's ...18.9Helda DSpace REST APIPublic REST API for Helda, the open institutional repository of the University of Helsinki, powered by DSpa...18.9Helda OAI-PMH Metadata InterfaceOAI-PMH metadata-harvesting endpoint for Helda, enabling third parties to harvest Dublin Core and other met...18.9KITopen OAI-PMH InterfaceKITopen is KIT's central open-access institutional repository for bibliographic data, full texts, images, r...18.9Knowledge Bank DSpace REST APIPublic REST API for the Knowledge Bank, Ohio State University Libraries' DSpace 7.6 institutional repositor...18.9Knowledge Bank OAI-PMH InterfaceOAI-PMH 2.0 metadata harvesting endpoint for the Knowledge Bank institutional repository. Supports the stan...18.9CentAUR OAI-PMH Metadata APIOAI-PMH 2.0 metadata harvesting interface for CentAUR, the Central Archive University of Reading institutio...18.6Repository@Nottingham OAI-PMHPublicly accessible OAI-PMH (Open Archives Initiative Protocol for Metadata Harvesting) interface for Repos...18.6uO Research DSpace REST APIPublic DSpace 7.6.5 REST/HATEOAS API for uO Research (Recherche uO Research), the University of Ottawa's in...18.6uO Research OAI-PMHOAI-PMH 2.0 metadata-harvesting endpoint for uO Research. An Identify request confirms protocol version 2.0...18.6HAL Search API (ens-lyon collection)HAL's Solr-backed REST/Search API for querying publications. Can be scoped to the ENS de Lyon collection (e...18.2HAL SWORD Deposit APIHAL's SWORD protocol API for programmatic deposit of documents into HAL, including into the ENS de Lyon col...18.2HAL-ENS-LYON OAI-PMHOAI-PMH 2.0 metadata harvesting endpoint scoped to the ENS de Lyon (ens-lyon) collection of the national HA...18.2USM Repository OAI-PMHOAI-PMH 2.0 metadata-harvesting interface for the USM Repository (Repository@USM), an EPrints 3.3.16 instit...17.9Heriot-Watt Research Portal (Pure)Public research information portal powered by Elsevier Pure, exposing Heriot-Watt University publications, ...17.7UI Scholars Hub OAI-PMHOpen Archives Initiative Protocol for Metadata Harvesting (OAI-PMH 2.0) interface for UI Scholars Hub, the ...17.7QSpace DSpace REST APIPublic DSpace 7.6 REST/HAL API backing the QSpace institutional repository. The API root reports dspaceVers...17.6QSpace OAI-PMH Metadata EndpointOpen Archives Initiative Protocol for Metadata Harvesting (OAI-PMH 2.0) endpoint for QSpace, the Qatar Univ...17.6Repositorio da Universidade de Lisboa OAI-PMHOAI-PMH 2.0 metadata harvesting interface for the DSpace-based institutional open-access repository (Reposi...17.6Scholarly Publications OAI-PMHOAI-PMH 2.0 metadata harvesting endpoint for the Leiden University Scholarly Publications repository, an Is...17.6Scholarworks@UAEU OAI-PMH Repository APIOAI-PMH 2.0 metadata harvesting endpoint for Scholarworks@UAEU, the university's open-access institutional ...17.6TOUR Institutional Repository OAI-PMHOAI-PMH 2.0 metadata harvesting endpoint for TOUR (TOhoku University Repository), the university's institut...17.6University of Liverpool Repository OAI-PMHOAI-PMH 2.0 metadata-harvesting interface for the University of Liverpool Repository, an EPrints-based open...17.6CUIR / Chula Digiverse Repository (OAI-PMH & DSpace REST)Chulalongkorn University Intellectual Repository (CUIR), now served via the Chula Digiverse digital preserv...17.3DI-fusion Group Export APIDocumented HTTP GET API that exports the publication list for a group of ULB scholars, defined either by a ...17.3DI-fusion OAI-PMH Harvesting ServiceULB's DI-fusion institutional repository documents an OAI-PMH harvesting service allowing third parties to ...17.3DI-fusion Scholar Export APIDocumented HTTP GET API that exports the publication list for a given ULB scholar (identified by matricule ...17.3HAL Search API (ENPC collection)École des Ponts ParisTech's scientific output is deposited in its institutional open-access repository, exp...17.3Research Commons OAI-PMHOAI-PMH 2.0 metadata harvesting endpoint for Research Commons. An Identify request returns repositoryName "...17.3Research Commons REST APIDSpace 7.6.5 REST API for the University of Waikato's Research Commons open access institutional repository...17.3MacSphere OAI-PMH Repository InterfacePublicly accessible OAI-PMH 2.0 metadata-harvesting interface for MacSphere, McMaster University Libraries'...17.2Research Online OAI-PMHOAI-PMH metadata harvesting interface for University of Wollongong Research Online, the institution's open ...17.2DADUN Institutional Repository (OAI-PMH)DADUN (Deposito Academico Digital de la Universidad de Navarra) is the university's open-access institution...17.0HUSCAP XML SitemapsPublicly crawlable XML sitemap index for the HUSCAP repository, providing a machine-readable list of reposi...17.0Massey Research Online DSpace REST APIHAL/JSON REST API for Massey Research Online, running DSpace 8.3. Exposes hypermedia (HATEOAS) endpoints fo...17.0Massey Research Online OAI-PMHOAI-PMH 2.0 metadata-harvesting interface for Massey Research Online (MRO), the DSpace institutional reposi...17.0Repositorio Institucional Seneca - DSpace REST APIDSpace REST API surface for the "Seneca" institutional repository, typically exposed under the /server/api ...17.0Repositorio Institucional Seneca - OAI-PMHOAI-PMH metadata harvesting interface for the DSpace-based institutional repository "Seneca", which collect...17.0UKM Journal Article Repository (OAI-PMH)EPrints-based repository of journal articles published by UKM faculties, institutes and UKM Press. Register...17.0UKM Learning and Research Repository (OAI-PMH)DSpace-based institutional repository operated by Perpustakaan Tun Seri Lanang (UKM Library) providing acce...17.0GUPEA Repository OAI-PMH InterfaceGUPEA (Gothenburg University Publications Electronic Archive) is the university's DSpace-based institutiona...16.7DDD Digital Document Repository OAI-PMHOAI-PMH 2.0 metadata harvesting endpoint for the Dipòsit Digital de Documents de la UAB (DDD), the universi...16.0RMIT Research Repository (Esploro)The RMIT Research Repository is RMIT University's open access research portal, powered by Clarivate's Esplo...15.7

Score breakdown

Frequency
64.6
log-scaled weighted occurrences
Breadth
3.7
spread across providers
Quality lift
33.3
mean composite of providers using it
Cohesion
58.2
strength of nearest seed neighbor

Related tags

OAI-PMH 106 co-occurrences University 113 co-occurrences Higher Education 114 co-occurrences DSpace 48 co-occurrences Repository 74 co-occurrences Institutional Repository 43 co-occurrences Research 101 co-occurrences Library 51 co-occurrences

Where this tag comes from

Api tag152
Provider tag92
Openapi tag2
Openapi op tag3

Cohort brief

Auto-generated

The 135 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
135
all scored
Mean Kin Score
29.2
+8.5 vs catalog 20.7
Mean Agent Readiness
14.8
+5.1 vs catalog 9.7
Spread
13.8–62.4
median 27.9 · σ 11.1
How the 135 split by band
Exemplar 0Strong 2Developing 27Thin 41Emerging 65Minimal 0
Facet averages, against the whole catalog
FacetThis cohortCatalogDifferenceScored
Contract Quality 33.3 17.5 +15.8 135
Operational Transparency 24.5 11.3 +13.2 135
Access Clarity 32.1 22.3 +9.8 135
Discoverability 68.8 60.4 +8.4 135
Contract Governance 8.3 6.4 +1.9 135
Developer Ergonomics 12.3 17.9 -5.6 135

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) 3% 16% -13
MCP server (first-party) 1% 7% -6
Agent Skills 0% 0% 0
OAuth scopes 14% 9% +5
Security 100% 88% +12
Arazzo workflows 1% 2% -1
Governance rules 47% 13% +34

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 Delft University of Technology 62.4
  2. 2 ExchangeRate-API 55.2
  3. 3 University of Cambridge 53.1
  4. 4 Figshare 52.3
  5. 5 PJM Interconnection 52.1
  6. 6 Seoul National University 50.6
  7. 7 Landgate 49.9
  8. 8 Australian National University 48.8
  9. 9 DeSci Labs 48.5
  10. 10 University of Manchester 47.8
Top by Agent Readiness
  1. 1 Landgate 39
  2. 2 DeSci Labs 36.8
  3. 3 IEEE Xplore 35.4
  4. 4 ExchangeRate-API 35
  5. 5 National University of Singapore 33.5
  6. 6 Erasmus University Rotterdam 33.1
  7. 7 Figshare 33.1
  8. 8 Hamad Bin Khalifa University 33.1
  9. 9 Loughborough University 33.1
  10. 10 Stockholm University 33.1
All 135 members of this roster resolve to a scored provider in the catalog.Generated from the catalog build of 25 August 2026, across 26891 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

curl for this page
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 
curl "https://apis.io/api/v1/cohorts/tag/open-access"
The distribution (Pro) 
curl "https://apis.io/api/v1/cohorts/tag/open-access/stats" \
  -H "X-API-Key: $APIS_IO_KEY"

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