established · -0.2

Crossref

Score 24.5 / 100 9 providers +61 via APIs 72 APIs Search apis.io →

Providers using this tag (9)

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

Developing 2 Usable, with meaningful gaps to close
University of OttawaUniversityHigher EducationEducationCanada3 APIs44.4Massey UniversityEducationHigher EducationUniversityNew Zealand2 APIs39.6
Thin 6 Limited public surface area
Universiti Sains MalaysiaUniversityHigher EducationEducationPublic Research University2 APIs34.5Tecnológico de MonterreyUniversityHigher EducationEducationMexico11 APIs31.4Case Western Reserve UniversityEducationHigher EducationUniversityPrivate Research University9 APIs29.4Universitat Pompeu FabraUniversityHigher EducationEducationPublic Research University6 APIs29.2University of OtagoUniversityHigher EducationEducationNew Zealand5 APIs29.2Universiti Teknologi MalaysiaUniversityHigher EducationEducationPublic Research University6 APIs28.4
Emerging 1 Early or largely undocumented
University of BarcelonaUniversityHigher EducationEducationSpain10 APIs24.4

APIs with this tag (72)

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
University of Waterloo Crossref MembershipThe University of Waterloo is Crossref member 6095, holding DOI prefix 10.15353 with 3,104 DOIs registered ...66.5
Strong 1 Solid coverage with minor gaps
University of Twente Library Crossref MembershipThe University Library registers DOIs with Crossref in the university's own name. Crossref member 2372, "Un...59.1
Developing 20 Usable, with meaningful gaps to close
Crossref membership — University of MinnesotaThe University of Minnesota is Crossref member 10551, registering DOIs under prefixes 10.24926 and 10.64517...53.4Crossref Membership (member 4211)The University of Warsaw is Crossref member 4211, holding 31 DOI prefixes used across its journals and pres...52.9Crossref Membership (members 36737 and 51378)REGISTRY MEMBERSHIP, recorded as a fact about the institution. Two Crossref member records carry the primar...52.6Taylor's University Crossref MembershipTaylor's University Press is Crossref member 37785, registered at Subang Jaya, Selangor, Malaysia, holding ...51.4HKUST Library Crossref DOI RegistrationHKUST Library is Crossref member 5801 and owns DOI prefix 10.14711, under which 14,453 records are register...49.9Crossref MembershipUnicamp is Crossref member 27633, "Universidade Estadual de Campinas", registering DOIs for its SBU journal...49.1Crossref memberships (organic units)Five ULisboa organic units hold Crossref member IDs in their own right, minting DOIs for their journals ind...48.6McMaster University Library Crossref MembershipMcMaster University Library's Crossref membership, under which it mints DOIs on its own prefix 10.15173 for...48.2Crossref 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...46.6UGM Journals OAI-PMHOAI-PMH 2.0 metadata harvesting endpoint for "Jurnal Universitas Gadjah Mada", the university-wide scholarl...46.6Digital Library Collections and the 10.7916 DOI namespaceColumbia University Libraries' digital collections platform and the resolution target for Columbia's own DO...44.7Crossref membership (7569, 16151)Two Crossref member records belong to the institution. Member 7569, "University of Ottawa Library", holds p...44.4Crossref Membership — Charles UniversityCharles University holds two Crossref memberships: 5727, "Charles University in Prague, Karolinum Press" (t...43.1Crossref Membership — KIT LibraryThe KIT Library is a Crossref member in its own right, depositing DOIs under the prefix 10.58895. Verified ...43.0Crossref Member — Texas A&M University LibrariesTexas A&M University Libraries is Crossref member 14385, holding DOI prefix 10.21423 with 7,464 registered ...42.7Crossref membershipGhent University is a Crossref member in its own name - member id 9286, DOI prefix 10.21825, registered in ...42.6Crossref membership and DOI prefixKing Saud University is Crossref member 19827 and owns DOI prefix 10.33948, under which Crossref reports 1,...41.8Crossref Membership — UF George A. Smathers LibrariesThe University of Florida George A. Smathers Libraries is a Crossref member, id 17357, depositing DOIs unde...39.9Crossref Membership — al-Farabi Kazakh National UniversityAl-Farabi Kazakh National University is a Crossref member in its own name (member 11115) and registers DOIs...39.7Crossref Membership — Massey UniversityMassey University registers DOIs with Crossref under member id 12895, prefixes 10.33217 and 10.54322, 314 D...39.6
Thin 41 Limited public surface area
Crossref DOI Registration (UKM Press and UKM faculties)Three Crossref memberships are held by units of Universiti Kebangsaan Malaysia, together accounting for 16,...39.2Crossref membership via Liverpool University Press (member 2165)Liverpool University Press, the University's own publishing house, is Crossref member 2165. Verified 2026-0...38.8Crossref Member 11812 - Universidad de los AndesDOI registration membership at Crossref. Member 11812, primary-name "Universidad de los Andes", location "B...38.7Crossref Open Funder Registry entry — Indian Institute of ScienceIISc holds Crossref Open Funder Registry id 100007780. Verified 2026-09-01 — https://api.crossref.org/funde...37.9SKKU Crossref Membership (DOI registration)Two Sungkyunkwan University units are Crossref members in their own right and register DOIs under their own...36.8Crossref MembershipThe University of Geneva is a Crossref member, id 13327, primary-name "Universite de Geneve". Recorded as a...36.6Crossref DOI Registration MembershipTwo Kyushu University units are Crossref members registering DOIs under their own prefixes, verified agains...36.4Crossref Memberships — Keio unitsTwo Keio units are Crossref members in their own right: member 1082, "Keio Journal of Medicine", DOI prefix...35.8Crossref Membership — Vanderbilt University LibraryVanderbilt University Library is Crossref member 6384, DOI prefix 10.15695, with 2,375 DOIs registered (164...35.7Crossref membershipQUT is a Crossref member, id 3230, primary-name "Queensland University of Technology", verified live agains...35.3Crossref member registrationTwo Hebrew University units are registered Crossref members with their own member ids: Hebrew University Ma...35.1Crossref Member 25426 (prefix 10.15460)The Staats- und Universitätsbibliothek Hamburg Carl von Ossietzky — the university library and publisher of...34.8Crossref membershipThe university is Crossref member 29262 "University of Antwerp", holding DOI prefixes 10.52034 and 10.63028...34.8Crossref membership — Universiti Sains MalaysiaUSM is Crossref member 8963, registering DOIs under prefixes 10.21315 (USM Press journals such as the Malay...34.5Crossref DOI Registration MembershipThree Tohoku University units are Crossref members registering DOIs under their own prefixes, verified agai...34.0Crossref Membership — Leiden University PressLeiden University Press, Leiden University's own academic press, is Crossref member 22598 with 2,588 regist...33.9Crossref membership (member 13551, prefix 10.53131)Sapienza is a Crossref member and DOI depositor. Verified live 2026-09-01 — https://api.crossref.org/member...32.5University of Exeter Press Crossref MembershipThe university's publishing arm is a Crossref member - member id 27616, primary name "University of Exeter ...32.5Crossref membership (member 3612, prefix 10.5565)UAB is a Crossref member in its own name. https://api.crossref.org/members/3612 returns primary-name "Unive...32.4Crossref Open Funder Registry membershipWaseda University holds Crossref Open Funder Registry ID 501100004423, located in Japan, with 1,458 works a...32.4Crossref membership (member 49418)Crossref member 49418, "Trinity College Dublin, the University of Dublin", holding prefix 10.69731. As of t...32.1Crossref membership (member 37851)ASU is a Crossref member, id 37851, primary-name "Arizona State University", located in Tempe, AZ, depositi...31.8Crossref DOI registration (institute-level memberships)Hanyang registers DOIs through Crossref at the research-institute level rather than centrally. Members and ...31.4Crossref Membership — member 25649Registered Crossref member 25649, "Instituto Tecnologico y de Estudios Superiores de Monterrey", Monterrey,...31.4Crossref 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...30.9Crossref membership (DOI registrant)UNAL is a Crossref member in its own right — member id 6146, DOI prefix 10.15446 — with a second member rec...30.6Crossref Membership (LPPM ITB)ITB is a registered Crossref member through its Institute for Research and Community Services (LPPM), which...30.3Crossref member registration — Case Western Reserve University (member 7530)CWRU is a registered Crossref member, id 7530, primary-name "Case Western Reserve University", holding six ...29.4Crossref membership (Qatar University Press)Qatar University Press is a Crossref member in its own right — member 11655, DOI prefix 10.29117, 2,533 DOI...29.3Crossref 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...29.2Otago Scholarly Identifier Registrations (DataCite + Crossref)Otago's persistent-identifier registrations, readable through each registry's public REST API. Confirmed li...29.2Crossref Membership (member 7412)The Ohio State University Libraries is Crossref member 7412 with 4,927 registered DOIs, covering the journa...28.9Crossref member and DOI prefixQueen Mary is a Crossref member, id 11031, holding DOI prefix 10.26494. Recorded as a registry membership o...28.8Crossref Funder Registry entry (501100018692)ENS de Lyon is registered in the Crossref Open Funder Registry as https://doi.org/10.13039/501100018692, na...28.6Crossref 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: ...28.4UTM 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...28.4Crossref membership (AUB)AUB is a Crossref member in its own right — member id 13566, primary name "American University of Beirut", ...28.0Crossref membership and DOI prefixesThe University of Aberdeen is Crossref member 12669, located "Aberdeen, United Kingdom", holding DOI prefix...27.3Crossref 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...27.0Crossref membership — DOI prefix 10.47836Universiti Putra Malaysia is a Crossref member in its own right, member id 27687, holding DOI prefix 10.478...26.9Crossref membershipKAU holds two Crossref memberships in its own name. Member 2709, "King Abdulaziz University Scientific Publ...26.4
Emerging 9 Early or largely undocumented
Crossref Member — Griffith UniversityGriffith University is Crossref member 5850. Two sub-unit members also resolve under the Griffith name — 50...26.1Crossref membership (DOI prefix 10.61762)UTP registers DOIs with Crossref under its own prefix 10.61762 — 405 DOIs (113 current, 292 backfile) acros...26.1Crossref 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...25.9Crossref Member 4386 (Universitas Indonesia)University of Indonesia is a Crossref member and DOI registrant. Verified against the Crossref REST API: ht...25.5Crossref 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...24.9Crossref 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...24.4Crossref membershipThe University of Chile is a Crossref member, id 3330, primary name "Universidad de Chile", DOI prefix 10.5...24.1Crossref Member 5618 — Department of MathematicsCrossref membership held at department level, not institution level. Member 5618, "Department of Mathematic...23.2Deakin University Crossref membership (member 8935)Deakin is a Crossref member depositing its own DOIs under prefix 10.21153 — 1,303 works, predominantly jour...20.0

Companies reaching this through an API (61)

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

Al-Farabi Kazakh National University American University of Beirut Arizona State University Autonomous University of Barcelona Autonomous University of Madrid Bandung Institute of Technology Charles University Columbia University Deakin University Gadjah Mada University Ghent University Griffith University Hanyang University Hebrew University of Jerusalem Hokkaido University Hong Kong University of Science and Technology Indian Institute of Science Bangalore Karlsruhe Institute of Technology Keio University King Abdulaziz University King Saud University Kyushu University Leiden University McMaster University National University of Colombia Ohio State University Qatar University Queen Mary University of London Queensland University of Technology Sapienza University of Rome Sungkyunkwan University Taylor's University Texas A&M University Tohoku University Trinity College Dublin Universiti Kebangsaan Malaysia Universiti Putra Malaysia Universiti Teknologi PETRONAS University of Aberdeen University of Antwerp University of Bologna University of Campinas University of Chile University of Exeter University of Florida University of Geneva University of Gothenburg University of Indonesia University of Lisbon University of Liverpool
Show all 61 companies ↓
University of Los Andes Colombia University of Minnesota University of Navarra University of Twente University of Warsaw University of Waterloo University of Wollongong Universität Hamburg Vanderbilt University Waseda University École Normale Supérieure de Lyon

Score breakdown

Frequency
50.3
log-scaled weighted occurrences
Breadth
0.2
spread across providers
Quality lift
36.6
mean composite of providers using it
Cohesion
30.6
strength of nearest seed neighbor

Related tags

ROR 65 co-occurrences DOI 66 co-occurrences Scholarly Publishing 45 co-occurrences Persistent Identifiers 47 co-occurrences Registry 53 co-occurrences Identity Federation 64 co-occurrences OAI-PMH 61 co-occurrences University 70 co-occurrences

Where this tag comes from

Api tag72
Provider tag9

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

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