emerging · 0.0 market industry

Identifiers

Score 22.6 / 100 5 providers +46 via APIs 58 APIs Search apis.io →
Business capabilities this tag reaches
Cybersecurity Management 1

Providers using this tag (5)

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

Developing 1 Usable, with meaningful gaps to close
MusicBrainzMusicMetadataEncyclopediaOpen Data16 APIs44.2
Thin 3 Limited public surface area
PlacekeyLocationGeocodingAddress Matching1 API36.2RORResearchOrganizationRegistry1 API32.2CrossrefCitationsDOIFunders1 API30.7
Emerging 1 Early or largely undocumented
GS1LogisticsSupply ChainBelgiumStandards1 API20.4

APIs with this tag (58)

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 4 Complete, well-documented, and agent-ready
HubSpot Identifiers APIThe Identifiers API from HubSpot — 2 operation(s) for identifiers.91.6Salesforce Identifiers APIThe Identifiers API from Salesforce — 6 operation(s) for identifiers.91.0Shopify Identifiers APIThe Identifiers API from Shopify — 75 operation(s) for identifiers.83.9Optimizely Identifiers APIThe Identifiers API from Optimizely — 3 operation(s) for identifiers.80.8
Strong 2 Solid coverage with minor gaps
Factset Identifiers APIThe Identifiers API from Factset — 2 operation(s) for identifiers.63.0Zaius Identifiers APIThe Identifiers API from Zaius — 3 operation(s) for identifiers.60.8
Developing 17 Usable, with meaningful gaps to close
Factiva Code APIEnables retrieval of codes necessary to search for companies, currencies, exchanges, locations, industries,...54.2pVerify MBI Lookup APILook up a Medicare Beneficiary Identifier for a patient from demographic data, for providers who need the M...52.8Avaya Identifiers APIRepresents the criteria with which a customer may be identified (Phone numbers, e-mail addresses, social me...52.5Crossref membership — University of MacauThe University of Macau is Crossref member 53643, with DOI prefix 10.64219 and 21 DOIs registered as of 202...51.3ROR identifier — University of MacauResearch Organization Registry identifier for the University of Macau, carrying its English, Portuguese and...51.3University of Twente Library Crossref MembershipThe University Library registers DOIs with Crossref in the university's own name. Crossref member 2372, "Un...50.7Stanford University Identifiers APIIdentifier operations50.3University of Wisconsin-Madison Identifiers APIThe identifiers API from University of Wisconsin-Madison — 1 operation(s) for identifiers.49.5PermID Entity Search APIRESTful API for searching and discovering organizations, equity instruments, and equity quotes using PermID...49.3PermID Record Matching APIRESTful API for matching unstructured entity records to PermID identifiers. Enables concordance by mapping ...49.3Symbology APIDiscovery Symbology API for concordance, navigation, and discovery of financial content. Enables mapping fr...49.3ROR organisation registrationUNIL's entry in the Research Organization Registry, https://ror.org/019whta54, established 1537, domain uni...45.2MusicBrainz Identifiers APINon-MBID lookups by ISRC, ISWC, and DiscID.44.2ROR registration (01zkghx44)Georgia Institute of Technology is registered in the Research Organization Registry as https://ror.org/01zk...42.3Emory University in the Research Organization Registry (ROR)Emory University is registered in ROR, the open registry of research organization identifiers, under ROR ID...40.3PMC ID Converter APIThe PMC ID Converter API translates between PubMed Central identifiers (PMCID), PubMed identifiers (PMID), ...39.6ROR RegistrationTexas A&M University is registered in the Research Organization Registry as https://ror.org/01f5ytq51, with...39.3
Thin 23 Limited public surface area
Research Organization Registry membershipIIT Kharagpur is registered in ROR as https://ror.org/03w5sq511, "Indian Institute of Technology Kharagpur"...39.0Corbado Identifiers APIManage login identifiers (email, phone, username) attached to a user.38.8B3 ISIN APIISIN issuance and management for financial instruments - B3 is the Brazilian numbering agency - covering IS...38.7ROR registrationGhent University is registered in the Research Organization Registry as https://ror.org/00cv9y106, distinct...38.6ROR registrationThe institution's entry in the Research Organization Registry, ROR ID 01nffqt88, carrying its canonical nam...38.5Asset Identifier Service (AIS)The USGS Asset Identifier Service (AIS) allows USGS personnel to reserve, register, publish, and manage USG...38.3Crossref Open Funder Registry entry — Indian Institute of ScienceIISc holds Crossref Open Funder Registry id 100007780. Verified 2026-09-01 — https://api.crossref.org/funde...34.7ROR registration — Indian Institute of ScienceIISc is registered in the Research Organization Registry as https://ror.org/04dese585. Verified 2026-09-01 ...34.7ROR registration — Nagoya UniversityNagoya University is registered in the Research Organization Registry as ROR ID https://ror.org/04chrp450, ...33.3STRING Identifiers APIMap protein names and synonyms to STRING identifiers32.9Terrain Discovery Environment API Identifiers APIPermanent identifier (DOI) requests32.5ROR REST APIThe ROR REST API provides programmatic access to the Research Organization Registry, enabling users to retr...32.2Crossref Membership (member 6347)The University of Waikato is a Crossref member — member id 6347, primary name "University of Waikato", DOI ...31.1ROR RegistrationKhalifa University of Science and Technology is registered in the Research Organization Registry as https:/...31.1ROR Registration (ror.org/013fsnh78)The University of Waikato is registered in the Research Organization Registry as https://ror.org/013fsnh78,...31.1Healthcare Identifiers (HI) ServiceThe national Healthcare Identifiers Service, providing unique identifiers for individuals (IHI), healthcare...30.7Nanjing University in the Crossref Open Funder RegistryNanjing University's entry in the Crossref Open Funder Registry as funder 501100008048, with 3,401 works re...30.7Nanjing University in the Research Organization Registry (ROR)Nanjing University's registration in ROR, the open registry of research organizations: ROR ID 01rxvg760, do...30.7Crossref DOI registration (institute-level memberships)Hanyang registers DOIs through Crossref at the research-institute level rather than centrally. Members and ...29.3ROR registrationResearch Organization Registry identifier for Hanyang University, the stable machine-readable identity othe...29.3Otreeba Identifiers APIThe Identifiers API from Otreeba — 1 operation(s) for identifiers.26.3Crossref Funder Registry entry (501100018692)ENS de Lyon is registered in the Crossref Open Funder Registry as https://doi.org/10.13039/501100018692, na...26.2ROR registry record (04zmssz18)ENS de Lyon's record in the Research Organization Registry, https://ror.org/04zmssz18, typed education and ...26.2
Emerging 12 Early or largely undocumented
ID Mapping REST APIMaps identifiers between UniProt accessions and over 150 external database identifiers (e.g., RefSeq, Ensem...24.7Medrio Subjects APICreate, list, and update clinical trial subjects within a study; manage Medrio and study subject identifier...24.4Reactome Identifiers APIQueries for multiple identifiers22.8ROR registration — Universitat de Barcelona (021018s57)The University of Barcelona's entry in the Research Organization Registry. ROR id https://ror.org/021018s57...22.6Open Civic DataOpen Civic Data is a community-maintained set of specifications and shared identifiers for civic informatio...22.2Crossref Member 5618 — Department of MathematicsCrossref membership held at department level, not institution level. Member 5618, "Department of Mathematic...21.5ROR Registry RecordResearch Organization Registry record https://ror.org/02e16g702, types education and funder, established 18...21.5ROR Registration — Harbin Institute of TechnologyHIT is registered in the Research Organization Registry with ROR ID 01yqg2h08, carrying the names Harbin In...21.4SpruceID Identifiers APIDID resolution implementing the W3C DID Resolution HTTP binding.20.6GS1 Digital Link Resolver (id.gs1.org)GS1 AISBL's own live, unauthenticated GS1-Conformant Resolver, implementing the GS1-Conformant Resolver Sta...20.4Sonyflake Distributed ID GeneratorSonyflake is a Go library producing 63-bit unique IDs inspired by Twitter's Snowflake but tuned for longer ...17.4ROR organization record (01b8kcc49)NCKU's Research Organization Registry record — ror.org/01b8kcc49, established 1931, status active, declared...15.5

Companies reaching this through an API (46)

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

Australian Digital Health Agency Avaya B3 (Brasil Bolsa Balcão) Corbado Emory University Factiva Factset Georgia Institute of Technology Ghent University Hanyang University Harbin Institute of Technology Hokkaido University HubSpot Indian Institute of Science Bangalore Indian Institute of Technology Kharagpur Khalifa University Medrio Nagoya University Nanjing University National Center for Biotechnology Information (NCBI) National Cheng Kung University Optimizely Otreeba Politecnico di Milano Public Sector pVerify Reactome Refinitiv Eikon Salesforce Shopify Sony SpruceID Stanford University STRING Terrain Discovery Environment API Texas A&M University U.S. Geological Survey UniProt University of Barcelona University of Lausanne University of Macau University of Twente University of Waikato University of Wisconsin-Madison Zaius École Normale Supérieure de Lyon

Score breakdown

Frequency
52.7
log-scaled weighted occurrences
Breadth
0.1
spread across providers
Quality lift
40.3
mean composite of providers using it
Cohesion
8.9
strength of nearest seed neighbor

Related tags

ROR 18 co-occurrences Registry 19 co-occurrences Course Catalog 13 co-occurrences Research Repository 18 co-occurrences DOI 12 co-occurrences University 22 co-occurrences Shibboleth 16 co-occurrences Scholarly 5 co-occurrences

Where this tag comes from

Api tag58
Provider tag5
Openapi tag16
Openapi op tag70

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  • 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.
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The distribution (Pro) 
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