established · 0.1 market industry

Persistent Identifiers

Score 24.6 / 100 8 providers +68 via APIs 151 APIs Search apis.io →

Providers using this tag (8)

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

Developing 1 Usable, with meaningful gaps to close
DeSci LabsCompanyAi Enterprise SoftwareResearch InfrastructureDecentralized Science1 API43.3
Thin 1 Limited public surface area
DataCiteDOIScholarly MetadataResearch Data2 APIs29.7
Emerging 6 Early or largely undocumented
RORResearchOrganizationIdentifiersRegistry1 API25.2University of WollongongEducationHigher EducationUniversityAustralia8 APIs26.1University of St AndrewsEducationHigher EducationUniversityPublic Research University7 APIs21.6Hokkaido UniversityEducationHigher EducationUniversityJapan10 APIs20.0University of ChileEducationHigher EducationUniversityPublic University10 APIs16.0Tianjin UniversityEducationHigher EducationUniversityResearch6 APIs15.6

APIs with this tag (151)

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 2 Solid coverage with minor gaps
University of Waterloo Crossref MembershipThe University of Waterloo is Crossref member 6095, holding DOI prefix 10.15353 with 3,104 DOIs registered ...56.7University of Waterloo ROR RecordThe University of Waterloo's Research Organization Registry record, ROR ID https://ror.org/01aff2v68, carry...56.7
Developing 11 Usable, with meaningful gaps to close
EU Open Data Portal Persistent Identifiers APICreate persistent identifiers for data artifacts.50.3UC San Diego DOI registration (DataCite / California Digital Library)UC San Diego Library mints DOIs for its Digital Collections under DataCite repository account CDL.UCSD ("UC...45.0Stanford Libraries PURL APIPersistent URLs into the Stanford Digital Repository. GET /{druid} returns HTML, /{druid}.xml returns the c...44.8Crossref Membership (member 4211)The University of Warsaw is Crossref member 4211, holding 31 DOI prefixes used across its journals and pres...43.1DataCite DOI Registration (REPOD / REPOD.DBUW)The University of Warsaw registers DOIs through DataCite. Its DataCite provider is `repod` — "University of...43.1ROR Registration (039bjqg32)The Research Organization Registry record for the University of Warsaw, https://ror.org/039bjqg32, resolvab...43.1Crossref membership — University of MinnesotaThe University of Minnesota is Crossref member 10551, registering DOIs under prefixes 10.24926 and 10.64517...41.9DataCite membership — University of MinnesotaThe University of Minnesota is a DataCite direct member, symbol UMN, registered since 2018-12-19 and linked...41.9ROR registration — University of MinnesotaThe University of Minnesota's Research Organization Registry identifier is https://ror.org/017zqws13. It is...41.9DataCite Membership — University of Bonn (BXBQ)The University of Bonn is a DataCite member organization and mints DOIs for its research data. Verified 202...41.4ROR Registry Record — University of BonnThe University of Bonn's Research Organization Registry identifier, https://ror.org/041nas322, verified liv...41.4
Thin 53 Limited public surface area
DataCite Membership — Washington University in St. Louis LibrariesWashington University in St. Louis Libraries is a DataCite direct member, symbol WUSTL, registered 2018-08-...38.5ROR Registration — Washington University in St. LouisThe institution's Research Organization Registry record, https://ror.org/01yc7t268, carrying its display na...38.5Crossref MembershipUnicamp is Crossref member 27633, "Universidade Estadual de Campinas", registering DOIs for its SBU journal...37.1DataCite Membership and DOI RegistrationUnicamp is a DataCite provider (member) in its own right, not merely a client of one. Verified 2026-09-01: ...37.1Crossref membership (member 9411, prefix 10.22146)Universitas Gadjah Mada is a Crossref member in its own name — member id 9411, DOI prefix 10.22146 — verifi...36.4ROR organization record (ror.org/03ke6d638)Universitas Gadjah Mada's Research Organization Registry identifier, https://ror.org/03ke6d638, verified li...36.4OCHRE Data Service APIOCHRE (Online Cultural and Historical Research Environment) is the University of Chicago's item-level resea...36.3McMaster University DataCite RegistrationMcMaster University's membership of DataCite as a consortium organisation within the Canadian DataCite cons...36.1McMaster University Library Crossref MembershipMcMaster University Library's Crossref membership, under which it mints DOIs on its own prefix 10.15173 for...36.1McMaster University ROR RegistrationMcMaster University's entry in the Research Organization Registry, the persistent identifier that links the...36.1DataCite membership — Fondren Library, Rice UniversityRice University is a DataCite direct member, registered 2017-11-13 as provider `rice` (symbol RICE) under F...36.0ROR registration — Rice UniversityRice University's entry in the Research Organization Registry, ROR ID https://ror.org/008zs3103. It is the ...36.0Crossref memberships (organic units)Five ULisboa organic units hold Crossref member IDs in their own right, minting DOIs for their journals ind...35.9DataCite repository membership (QWBT.ULISBOA)An active DataCite repository client registered to the university's central services for minting DOIs over ...35.9ROR organization identifierThe institution's registered ROR identifier — the canonical machine-readable organizational identity used a...35.9DataCite Membership and DOI PrefixesThe University of Reading is a DataCite member — a fact about the institution, not a contract it operates. ...35.2ROR Organization RegistrationThe university's entry in the Research Organization Registry, https://ror.org/05v62cm79 — machine-readable ...35.2Tsinghua University DataCite DOI Registration and ResolutionTsinghua University holds a DataCite membership in its own name — symbol TSINGHUA, memberType direct_member...35.0Digital Library Collections and the 10.7916 DOI namespaceColumbia University Libraries' digital collections platform and the resolution target for Columbia's own DO...33.9ROR Organization RegistrationTongji University is registered in the Research Organization Registry with ROR ID https://ror.org/03rc6as71...33.3Crossref Membership — Charles UniversityCharles University holds two Crossref memberships: 5727, "Charles University in Prague, Karolinum Press" (t...32.9DataCite Registrant — Charles University (CUNI)Charles University is a DataCite registrant under provider symbol CUNI, memberType consortium_organization,...32.9ROR Registration — Charles UniversityCharles University is registered in the Research Organization Registry as https://ror.org/024d6js02, locate...32.9DataCite membership and repository registrationThe University of Freiburg is a DataCite member (symbol QVVC, country DE, consortium organization under the...32.7ROR organization identifierThe institution's Research Organization Registry identifier, https://ror.org/0245cg223, carrying its names ...32.7Crossref Membership — KIT LibraryThe KIT Library is a Crossref member in its own right, depositing DOIs under the prefix 10.58895. Verified ...32.6DataCite Membership and DOI RegistrationChalmers is a DataCite consortium organization (member id ojuo, joined 2020-09-14, ROR https://ror.org/040w...32.6DataCite Membership — Karlsruhe Institute of Technology (KIT)KIT is a DataCite direct member, registering DOIs for its own research output rather than through a consort...32.6ORCID in Chalmers ResearchThe Chalmers Research CRIS surfaces ORCID iDs on researcher profiles and links out to the ORCID registry, e...32.6ROR RegistrationChalmers University of Technology is registered in the Research Organization Registry as https://ror.org/04...32.6ROR Registry Record — Karlsruhe Institute of TechnologyKIT's Research Organization Registry identifier, https://ror.org/04t3en479, verified live 2026-09-01 agains...32.6DataCite membership and DOI registration (member AWZY)The university is a DataCite member and DOI registrant — a fact about the institution, recorded here as a m...31.4ROR registration (Research Organization Registry)The institution's entry in the Research Organization Registry, ROR ID https://ror.org/03a1kwz48. A registry...31.4Crossref Membership — Massey UniversityMassey University registers DOIs with Crossref under member id 12895, prefixes 10.33217 and 10.54322, 314 D...29.4DataCite Membership — Massey UniversityMassey University is a DataCite member organization within the DataCite New Zealand consortium and mints DO...29.4ROR Registration — Massey UniversityMassey University's entry in the Research Organization Registry. This is the canonical machine-readable ide...29.4DataCite Membership — NYCU Research Data ServiceNYCU is a DataCite direct member in its own name — provider gtfe — and operates the DataCite repository cli...28.8ROR RegistrationNYCU's entry in the Research Organization Registry, ROR ID 00se2k293 — the canonical machine-readable ident...28.8Crossref Member 11812 - Universidad de los AndesDOI registration membership at Crossref. Member 11812, primary-name "Universidad de los Andes", location "B...27.7DataCite Consortium Organization UDLAC - Universidad de los Andes ColombiaDOI registration membership at DataCite. Consortium organization UDLAC, displayName "Universidad de los And...27.7ROR 02mhbdp94 - Universidad de los AndesResearch Organization Registry record for the institution. ROR ID 02mhbdp94, established 1948, declared dom...27.7Crossref membership via Liverpool University Press (member 2165)Liverpool University Press, the University's own publishing house, is Crossref member 2165. Verified 2026-0...27.6DataCite repository membership (BL.LPOOL)The University of Liverpool is a DataCite repository member and has been since 2015. Verified 2026-09-01: h...27.6ORCID affiliation programme (UK ORCID consortium)The University of Liverpool Library operates an ORCID member integration through the Jisc-run UK ORCID cons...27.6ROR organisation record (04xs57h96)The institution's entry in the Research Organization Registry. Verified 2026-09-01: https://api.ror.org/v2/...27.6Crossref DOI Registration MembershipTwo Kyushu University units are Crossref members registering DOIs under their own prefixes, verified agains...27.5DataCite DOI Registration MembershipKyushu University is a DataCite consortium organization — provider id `kyushuu`, symbol KYUSHUU, region APA...27.5ROR Organization RecordKyushu University's Research Organization Registry record, ROR ID 00p4k0j84, carrying the English, romanize...27.5DataCite Membership and Open Research Exeter DOI RegistrationExeter is a registered DataCite member - provider symbol VUEX, name "University of Exeter", memberType cons...26.8SKKU Crossref Membership (DOI registration)Two Sungkyunkwan University units are Crossref members in their own right and register DOIs under their own...26.8SKKU ROR Registration (organization identifier)Sungkyunkwan University is registered in the Research Organization Registry as https://ror.org/04q78tk20, w...26.8University of Exeter Press Crossref MembershipThe university's publishing arm is a Crossref member - member id 27616, primary name "University of Exeter ...26.8University of Exeter ROR RegistrationExeter is registered in the Research Organization Registry with ROR identifier https://ror.org/03yghzc09, t...26.8
Emerging 85 Early or largely undocumented
Crossref membership (University of Wollongong Library, member 5587)The University of Wollongong Library is Crossref member 5587, holding the DOI prefix 10.14453 with 1,611 re...26.1DataCite membership (repository uow.figshare)The University of Wollongong is a DataCite consortium organization, symbol UOW, provider id uow, created 20...26.1ROR registration (00jtmb277)The University of Wollongong is registered in the Research Organization Registry as https://ror.org/00jtmb2...26.1Crossref Member 25426 (prefix 10.15460)The Staats- und Universitätsbibliothek Hamburg Carl von Ossietzky — the university library and publisher of...26.0DataCite Registrant (prefix 10.25592)Universität Hamburg is a DataCite registrant. DOI prefix 10.25592 resolves to DataCite client tib.fdmuh, na...26.0ROR Registration (00g30e956)Universität Hamburg is registered in the Research Organization Registry as https://ror.org/00g30e956. Membe...26.0Crossref MembershipThe University of Geneva is a Crossref member, id 13327, primary-name "Universite de Geneve". Recorded as a...25.8DataCite Repository MembershipUNIGE is a registered DataCite repository operator through the Swiss consortium (DataCite provider "opkb")....25.8Crossref Membership (eleven faculty and institute member records)Chulalongkorn registers Crossref DOIs through eleven separate member records, one per faculty, institute or...25.4DataCite Membership (consortium organization lygd)Chulalongkorn University is a DataCite consortium organization, provider id lygd, country TH, with one regi...25.4LSE DOI Registration (DataCite)LSE is a registered DataCite provider — member identifier lcqr, "London School of Economics", memberType co...25.4ROR Registration (https://ror.org/028wp3y58)Chulalongkorn University's Research Organization Registry record, carrying the Thai and English names, the ...25.4Curtin University DOI Registration (DataCite)Curtin University is a DataCite member organisation and had minted 3,243 DOIs under its provider at time of...25.2University of Alberta Library DOI Registration (DataCite)The University of Alberta Library is a registered DataCite repository — client id ualberta.library, symbol ...24.6Crossref DOI Registration (UKM Press and UKM faculties)Three Crossref memberships are held by units of Universiti Kebangsaan Malaysia, together accounting for 16,...24.4ROR Organization RegistrationUniversiti Kebangsaan Malaysia is registered in the Research Organization Registry as https://ror.org/00bw8...24.4DataCite Consortium Membership (VIOJ)Leiden University is a DataCite consortium_organization with symbol VIOJ, organizationType academicInstitut...24.2ROR RegistrationLeiden University is registered in the Research Organization Registry as https://ror.org/027bh9e22, domain ...24.2ROR organization identifierUNAL is registered in the Research Organization Registry as https://ror.org/059yx9a68 ("National University...24.1DataCite membership (provider HLQC)TU Darmstadt registers DOIs through DataCite. Verified live 2026-09-01 via api.datacite.org/providers/hlqc:...24.0ROR registrationTU Darmstadt is registered in the Research Organization Registry as https://ror.org/05n911h24, established ...24.0Crossref Open Funder Registry membershipWaseda University holds Crossref Open Funder Registry ID 501100004423, located in Japan, with 1,458 works a...23.5ROR registration (Research Organization Registry)Waseda University is registered in the Research Organization Registry as https://ror.org/00ntfnx83 — establ...23.5Crossref membershipQUT is a Crossref member, id 3230, primary-name "Queensland University of Technology", verified live agains...23.3DataCite DOI and RAiD registrationQUT registers persistent identifiers with DataCite through the ARDC consortium. Two clients are evidenced: ...23.3ROR registrationQUT's Research Organization Registry identifier is https://ror.org/03pnv4752. The canonical machine-readabl...23.3Crossref membership (member 49418)Crossref member 49418, "Trinity College Dublin, the University of Dublin", holding prefix 10.69731. As of t...23.2DataCite consortium membership (provider TCD)Trinity is a DataCite consortium organization, symbol TCD, country IE, linked to https://ror.org/02tyrky19....23.2ROR organization record (02tyrky19)Trinity's Research Organization Registry identifier, https://ror.org/02tyrky19, the canonical machine-reada...23.2Crossref membership (member 13551, prefix 10.53131)Sapienza is a Crossref member and DOI depositor. Verified live 2026-09-01 — https://api.crossref.org/member...23.1DataCite DOI registration (provider ROMAUNO / repository CRUI.UNIROMA1)Sapienza is a registered DataCite member and DOI registrant — a fact about the institution, not a contract ...23.1ROR organization identifier 02be6w209Sapienza is registered in the Research Organization Registry with ROR ID https://ror.org/02be6w209, names "...23.1Crossref DOI Registration MembershipThree Tohoku University units are Crossref members registering DOIs under their own prefixes, verified agai...23.0Crossref Membership — member 25649Registered Crossref member 25649, "Instituto Tecnologico y de Estudios Superiores de Monterrey", Monterrey,...23.0DataCite Membership — ITESMTecnológico de Monterrey is a DataCite consortium organization, symbol ITESM, active, region AMER, country ...23.0ROR Organization RecordTohoku University's Research Organization Registry record, ROR ID 01dq60k83, carrying the English, romanize...23.0ROR Registration — 03ayjn504Research Organization Registry identifier https://ror.org/03ayjn504, established 1943, domain tec.mx, locat...23.0DataCite Membership (VLEF)Humboldt-Universität zu Berlin is a DataCite member — provider symbol VLEF, memberType consortium_organizat...22.7Crossref membership (member 37851)ASU is a Crossref member, id 37851, primary-name "Arizona State University", located in Tempe, AZ, depositi...22.6DataCite membership and repository registrationASU is a DataCite member (provider symbol ASU, memberType consortium_organization, created 2020-09-22) and ...22.6ROR organization record (03efmqc40)ASU's Research Organization Registry record, ror.org/03efmqc40, established 1885, status active, domain asu...22.6Crossref Membership (member 6332)The University of St Andrews Library is Crossref member 6332, holding 688 DOIs (151 current, 537 backfile) ...21.6DataCite Membership (provider NAHY)The University of St Andrews is a registered DataCite provider - id nahy, symbol NAHY, memberType consortiu...21.6ROR Registration (02wn5qz54)The University of St Andrews is registered in the Research Organization Registry as https://ror.org/02wn5qz...21.6USC DataCite DOI Registration (Provider Account)USC holds a DataCite direct membership in its own name and mints DOIs for eleven USC repositories under it....21.6ROR RegistrationITB is registered in the Research Organization Registry as https://ror.org/00apj8t60 ("Bandung Institute of...21.4Crossref member and DOI prefixQueen Mary is a Crossref member, id 11031, holding DOI prefix 10.26494. Recorded as a registry membership o...21.0DataCite member organisation and repository clientQueen Mary is a DataCite member organisation, provider id "iuar", memberType consortium_organization, linke...21.0DataCite Membership — University of Bern (UNIBE)The University of Bern is a DataCite direct member, registering DOIs for its research outputs. Verified 202...21.0ROR organisation identifierQueen Mary's Research Organization Registry identifier, https://ror.org/026zzn846. It is the join key that ...21.0ROR organization record — Case Western Reserve University (051fd9666)CWRU's Research Organization Registry record, https://ror.org/051fd9666, established 1826, domain case.edu,...21.0ROR Registry Record — University of BernThe University of Bern's Research Organization Registry identifier, https://ror.org/02k7v4d05, verified liv...21.0Crossref Membership (member 7412)The Ohio State University Libraries is Crossref member 7412 with 4,927 registered DOIs, covering the journa...20.5DataCite Membership (GVUZ)The Ohio State University is a DataCite direct member, provider symbol GVUZ, active, linked to ROR https://...20.5ROR RegistrationThe Ohio State University is registered in the Research Organization Registry as https://ror.org/00rs6vg23,...20.5University of Copenhagen DataCite Membership (XIZZ)The university is an active DataCite member — provider symbol XIZZ, memberType consortium_organization, isA...20.4Crossref Membership (member 14960, prefix 10.31009)UPF is a Crossref member and registers DOIs under its own prefix. Probed 2026-09-01: GET https://api.crossr...20.3ROR Registration (04n0g0b29)UPF's entry in the Research Organization Registry. Probed 2026-09-01: GET https://api.ror.org/v2/organizati...20.3Crossref membership — Penerbit UTM Press (member 4787, prefix 10.11113)UTM's own university press is a Crossref member in its own right, not a customer of someone else's prefix: ...20.2Handle.Net naming authority 10576Qatar University holds Handle.Net prefix 10576 and every QSpace item carries a persistent identifier under ...20.2ROR registration — https://ror.org/026w31v75UTM is registered in the Research Organization Registry as ror.org/026w31v75, with domain utm.my, establish...20.2Handle System Prefix 2115Hokkaido University Library holds Handle System naming authority prefix 2115, which mints the persistent id...20.0JaLC DOI Prefix 10.14943Hokkaido University registers DOIs through JaLC, the Japan Link Center, under prefix 10.14943. Confirmed fr...20.0Otago Scholarly Identifier Registrations (DataCite + Crossref)Otago's persistent-identifier registrations, readable through each registry's public REST API. Confirmed li...19.8Handle System prefix 10938 (AUB ScholarWorks)AUB holds Handle System prefix 10938, the persistent identifier namespace behind every AUB ScholarWorks rec...19.6Crossref membership and DOI prefixesThe University of Aberdeen is Crossref member 12669, located "Aberdeen, United Kingdom", holding DOI prefix...18.9DataCite membership and registered repositoryThe University of Aberdeen is a DataCite member — provider symbol HUGZ, memberType consortium_organization,...18.9Crossref membership (member 32492, prefix 10.60923)The University of Bologna is a Crossref member and DOI depositor. Verified live 2026-09-01 — https://api.cr...18.6DataCite DOI registration (provider UYEY, 32,291 DOIs)The University of Bologna is a registered DataCite member and DOI registrant — a fact about the institution...18.6ROR organization identifier 01111rn36The University of Bologna is registered in the Research Organization Registry with ROR ID https://ror.org/0...18.6DataCite DOI Registrant — Griffith UniversityGriffith University is a DataCite provider, registering DOIs for its research outputs and datasets. Provide...18.3ROR registry entry (Research Organization Registry)Wuhan University is registered in ROR as https://ror.org/033vjfk17 (active, established 1893), cross-walked...18.3Crossref membership — DOI prefix 10.47836Universiti Putra Malaysia is a Crossref member in its own right, member id 27687, holding DOI prefix 10.478...18.2ROR organization recordUniversiti Putra Malaysia holds ROR identifier https://ror.org/02e91jd64, cross-walked in the ROR record to...18.2Crossref Membership — Servicio de Publicaciones de la UAMUAM's publications service is a Crossref member (member id 6788) and mints DOIs under prefix 10.15366, with...18.0ROR Registration — Universidad Autónoma de MadridUAM's Research Organization Registry identifier, https://ror.org/01cby8j38, the canonical machine-readable ...18.0Crossref Membership (DOI prefix 10.15581)The University of Navarra is a Crossref member and registers DOIs under its own prefix 10.15581 — 33,267 DO...17.1ROR RegistrationThe institution's entry in the Research Organization Registry, the open identifier used to disambiguate res...17.1Crossref membershipThe University of Chile is a Crossref member, id 3330, primary name "Universidad de Chile", DOI prefix 10.5...16.0DataCite membership and repository registrationThe University of Chile is a DataCite member, not a DataCite operator. Evidenced 2026-09-01 from the DataCi...16.0Crossref Membership (member 34483, prefix 10.55582)Tianjin University is a Crossref member in its own right — member id 34483, DOI prefix 10.55582 — and is al...15.6ROR Registration (https://ror.org/012tb2g32)Tianjin University's Research Organization Registry record — the canonical machine-readable identifier for ...15.6Queen's University Belfast Research Portal — DataCite repository clientQueen's University Belfast is a DataCite consortium organization (provider jxtg) and has operated a registe...14.9Deakin University Crossref membership (member 8935)Deakin is a Crossref member depositing its own DOIs under prefix 10.21153 — 1,303 works, predominantly jour...12.9Deakin University DataCite repository (ARDCX.DEAKIN)Deakin's own DataCite repository account, held under the ARDC (Australian Research Data Commons) consortium...12.9

Companies reaching this through an API (68)

These companies publish an API, specification or operation carrying “Persistent Identifiers” 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.

American University of Beirut Arizona State University Autonomous University of Madrid Bandung Institute of Technology Case Western Reserve University Chalmers University of Technology Charles University Columbia University Curtin University Deakin University EU Open Data Portal Gadjah Mada University Griffith University Humboldt-Universität zu Berlin Karlsruhe Institute of Technology Kyushu University Leiden University London School of Economics and Political Science Massey University McMaster University National University of Colombia National Yang Ming Chiao Tung University Ohio State University Qatar University Queen Mary University of London Queen's University Belfast Queensland University of Technology Rice University Sapienza University of Rome Stanford University Sungkyunkwan University Technical University of Darmstadt Tecnológico de Monterrey Tohoku University Tongji University Trinity College Dublin Tsinghua University Universitat Pompeu Fabra Universiti Kebangsaan Malaysia Universiti Putra Malaysia Universiti Teknologi Malaysia University of Aberdeen University of Alberta University of Bern University of Bologna University of Bonn University of California, San Diego University of Campinas University of Chicago University of Copenhagen
Show all 68 companies ↓
University of Exeter University of Freiburg University of Geneva University of Lisbon University of Liverpool University of Los Andes Colombia University of Minnesota University of Navarra University of Otago University of Reading University of Southern California University of Tübingen University of Warsaw University of Waterloo Universität Hamburg Waseda University Washington University in St. Louis Wuhan University

Score breakdown

Frequency
57.4
log-scaled weighted occurrences
Breadth
0.2
spread across providers
Quality lift
27.0
mean composite of providers using it
Cohesion
31.8
strength of nearest seed neighbor

Related tags

DOI 67 co-occurrences ROR 54 co-occurrences Crossref 47 co-occurrences DataCite 51 co-occurrences Scholarly Publishing 37 co-occurrences Shibboleth 60 co-occurrences University 72 co-occurrences Research Data 58 co-occurrences

Where this tag comes from

Api tag151
Provider tag8
Openapi tag1
Openapi op tag2

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  • 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.
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This tag 
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curl "https://apis.io/api/v1/tags?limit=25"
As a scored cohort 
curl "https://apis.io/api/v1/cohorts/tag/persistent-identifiers"
The distribution (Pro) 
curl "https://apis.io/api/v1/cohorts/tag/persistent-identifiers/stats" \
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