emerging · 1.7

Directory

Score 23.3 / 100 71 providers 61 APIs Search apis.io →
Variants seen in the corpus: Directorydirectory

Providers using this tag (71)

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

Exemplar 1 Complete, well-documented, and agent-ready
SendPulseMarketingMarketing AutomationEmailTransactional Email19 APIs75.7
Strong 5 Solid coverage with minor gaps
SyllableCompanyArtificial IntelligenceAI AgentsVoice41 APIs64.8ShodanSecuritySearchInternetDevices15 APIs63.6C1CompanyIdentityAccess ManagementIAM47 APIs55.4EligibleBillingEligibilityHealthcareInsurance5 APIs55.4TenableCompanyEnterpriseCybersecurityVulnerability Management107 APIs54.7
Developing 19 Usable, with meaningful gaps to close
University of Wisconsin-MadisonUniversityHigher EducationEducationPublic Research University16 APIs51.6NHS EnglandHealthcareUnited KingdomNational Health SystemFHIR10 APIs51.5CertifyosCompanyHealthcareProvider DataCredentialing59 APIs51.1KU LeuvenUniversityHigher EducationEducationBelgium49 APIs50.7Stanford UniversityUniversityHigher EducationEducationResearch15 APIs50.5ConductorOneCompanyCloud SaasIdentity SecurityAccess Governance46 APIs50.3Google WorkspaceCalendarCollaborationEmailProductivity29 APIs47.5Tyro PaymentsPaymentsAustraliaMerchant AcquiringPayment Gateway13 APIs45.6Google People APIAddress BookContactsGoogle4 APIs45.4RelativityeDiscoveryLegalDocument ReviewLegal Technology51 APIs45.3legal.ge Public APIsLegalLawLegal Services2 APIs43.7RoadsyncCompanyFinancial-ServicesPaymentsLogistics18 APIs43.4Azure Active DirectoryAuthenticationAuthorizationIdentityOpenID Connect6 APIs42.8Kno2Healthcare InteroperabilityClinical RecordsHealth Information ExchangeDirect Secure Messaging7 APIs42.4NHS DigitalNHSHealthFHIRUK23 APIs41.6University of AucklandEducationHigher EducationUniversityResearch Data12 APIs41.0Columbia UniversityUniversityHigher EducationEducationIvy League10 APIs40.8AlayaCareHome CareCommunity CareHealthcareScheduling113 APIs39.7Princeton UniversityUniversityHigher EducationEducationIvy League14 APIs39.5
Thin 25 Limited public surface area
NuxeoContent ManagementDigital Asset ManagementEnterpriseDocuments22 APIs38.5NachaPaymentsUnited StatesACHAccount-to-Account24 APIs38.4FedNow ServicePaymentsUnited StatesReal-Time PaymentsInstant Payments5 APIs38.2UK Open BankingOpen BankingFinancial-ServicesPaymentsAccount Information42 APIs38.2AsertoAuthorizationFine-Grained Access ControlRBACABAC8 APIs38.0KonsentusOpen BankingOpen FinancePSD2PSD33 APIs37.6University of ViennaEducationHigher EducationUniversityResearch16 APIs35.2Dartmouth CollegeEducationHigher EducationUniversityResearch9 APIs35.1University of PennsylvaniaEducationHigher EducationUniversityResearch University10 APIs34.8WazoTelephonyVoIPUnified CommunicationsUCaaS14 APIs34.6Australian Digital Health AgencyHealthcareAustraliaNational Health SystemFHIR6 APIs33.9University of PaduaEducationHigher EducationUniversityOpen Data19 APIs33.6GleanAgentsArtificial IntelligenceAnswersChat22 APIs33.5Microsoft Active DirectoryAuthenticationAuthorizationDirectory ServicesEnterprise8 APIs33.2Google Admin SDKAdministrationDevicesEnterprise1 API32.7Centers for Disease Control and PreventionCDCEnvironmental HealthEpidemiologyFederal-Government9 APIs31.8MatrixMessagingDecentralizedFederatedOpen Standard20 APIs31.3ReownWeb3WalletsWalletConnectAppKit7 APIs31.1BambooHRHRHRISHuman ResourcesPayroll8 APIs31.0Blubrry APIPodcastingAudioMediaPublishing7 APIs30.2APIContextAPI DirectoryAPI MonitoringConformancePerformance13 APIs29.1Knight FrankReal-EstateUnited KingdomProperty ListingsCommercial Real Estate1 API29.1Cisco Directory ConnectorActive DirectoryEnterpriseIdentity Management4 APIs27.8SpaceAPICo-WorkingEvent SpacesMaker SpacesHackerspaces1 API26.8PulseMCPMCPAI AgentsAgentic Engineering1 API26.5
Emerging 13 Early or largely undocumented
Let's EncryptCertificatesLinux FoundationSecurityTLS7 APIs26.0CasdoorAuthenticationAuthorizationIAMIdentity15 APIs25.2LineaBlockchainLayer 2EthereumzkEVM10 APIs24.5KlarifyCompanyHealthcareMental HealthArtificial Intelligence22.2UCLEducationHigher EducationUniversityUnited Kingdom6 APIs20.8Applied SystemsInsuranceInsurtechAgency ManagementApplied Epic5 APIs20.5SubsplashChurchMinistryNon-ProfitGiving5 APIs17.2IntermediaCloudCommunicationsContact CenterVideo Conferencing5 APIs16.2CareLuLuCompanyChildcareDaycarePreschool13.3Bureau of Indian AffairsFederal-GovernmentGISICWAIndigenous3 APIs12.8API StackAPI DesignAPI DirectoryAPI GatewaysAPI Management1 API12.4Startup BufferProduct DiscoveryStartupsListing11.8Startup RankingRankingsStartupsAnalytics11.8
Minimal 8 Almost no public developer surface
SerchenCloud ServicesSoftware-as-a-Service10.2SulekhaCompanyMarketplaceClassifiedsLocal Services10.2PartingCompanyFuneral ServicesDeath CareCremation8.5OpenLDAPDirectory ServicesLDAPIdentityAuthentication1 API8.2EventupCompanyEventVenuesMarketplace7.3CurlieCategorizationDMOZEditorial6.0MoonFruitCompanyMarketing AgenciesDigital Marketing5.0API Evangelist NetworkIndexNetwork2.6

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 1 Complete, well-documented, and agent-ready
SendPulse File Manager APIFile upload, directory organisation and asset retrieval for use in campaigns, templates and chatbot flows.75.7
Strong 5 Solid coverage with minor gaps
Syllable Directory APIOperations related to directory64.8Shodan Directory APIBrowse and search saved Shodan queries.63.6C1 Directory APIThe Directory API from C1 — 2 operation(s) for directory.55.4Eligible Payers APIThe Payers API exposes the directory of insurance payers supported by Eligible, including payer identifiers...55.4Tenable Directory APIRepresents an Active directory54.7
Developing 19 Usable, with meaningful gaps to close
Person APIAuthoritative person and identity data for UW-Madison — names, populations, affiliations, contact points, e...51.6Service Search (Directory of Healthcare Services) APISearch the national Directory of Healthcare Services for NHS organisations, services and their attributes. ...51.5Certifyos Directory APIAPIs for directory operations51.1KU Leuven Organizational Chart (Organigram) APIICTS Data Services REST API exposing public organizational-structure information matching the institutional...50.7KU Leuven Person Information APIICTS Data Services REST API exposing public personnel / who-is-who person information. An expanded intranet...50.7CAP / Stanford Profiles APIAPI over the Community Academic Profiles directory (18,000+ faculty, students, postdocs and staff). The int...50.5ConductorOne Directory APIThe Directory API from ConductorOne — 2 operation(s) for directory.50.3People APIRead and manage the authenticated user contacts and profiles, and search the directory.47.5Tyro Connect Location APIReturns merchant location details keyed by Tyro Connect location identifier, used by partners to resolve an...45.6Relativity Directory APIThe Directory API from Relativity — 2 operation(s) for directory.45.3legal.ge Public APIs Directory APILook up services, practice areas and verified specialists on legal.ge.43.7Roadsync directory APIThe directory API from Roadsync — 1 operation(s) for directory.43.4Azure Active Directory Directory APIDirectory roles and objects42.8Kno2 Directory APIValidate Direct addresses and list document types.42.4Directory of Healthcare Services (Service Search) APISearch for NHS healthcare services across England including GPs, dentists, opticians, hospitals, pharmacies...41.6Spine Directory Service - FHIR APIQuery the Spine Directory Service (SDS) to look up endpoint information, organisation codes, and service me...41.6University Directory APIA set of public University Directory APIs that allow anyone to search for University of Auckland staff and ...41.0CU Directory of ClassesThe public web directory of Columbia University class offerings, browsable by subject, department, semester...40.8AlayaCare Directory APIThe Directory API from AlayaCare — 1 operation(s) for directory.39.7
Thin 25 Limited public surface area
Nuxeo Directory APIDirectory Operations38.5Afinis Bank Contact V2 APIAfinis Bank Contact V2 API, a two-step input/retrieve interface for exchanging standardized financial-insti...38.4Afinis Bank Contacts APIAfinis Bank Contacts API for retrieving standardized operational contact information for financial institut...38.4Afinis Payee Profile APIAfinis Payee Profile API for exchanging standardized payee onboarding and directory profile information bet...38.4FedNow Participant List APIService Management API returning the current list of FedNow Service participants so an institution can conf...38.2UK Open Banking Directory APITechnical API describing the Open Banking Directory, including participant registration, Software Statement...38.2Aserto directory APIThe directory API from Aserto — 14 operation(s) for directory.38.0Konsentus Open Trust PlatformEnd-to-end platform used by central banks and market operators to build, manage, and maintain national or r...37.6University of Vienna directory APIRequests related to users, user groups and organisation structure35.2DartAPI Developer PortalDartAPI is Dartmouth's institutional API platform, documenting resource APIs such as the People API (direct...35.1Wazo Directory & Contacts API (wazo-dird)Directory lookup, reverse lookup and personal-contact service. Aggregates multiple directory backends (CSV,...34.6Wazo Phone Directory & Service API (wazo-phoned)Directory and service endpoints consumed directly by desk phones. Serves vendor-specific XML/HTML phone dir...34.6Healthcare Identifiers (HI) ServiceThe national Healthcare Identifiers Service, providing unique identifiers for individuals (IHI), healthcare...33.9University of Padua directory APIRequests related to users, user groups and organisation structure33.6Glean people APIThe people API from Glean — 2 operation(s) for people.33.5LDAP Protocol InterfaceLightweight Directory Access Protocol interface for querying and modifying Active Directory.33.2CDC Open Technology API Indexopen.cdc.gov is CDC's Open Technology landing site that indexes the agency's public APIs, open-source GitHu...31.8Matrix Directory APIThe Directory API from Matrix — 1 operation(s) for directory.31.3Reown Cloud Explorer APIREST API to retrieve listings of WalletGuide-approved wallets, dApps, hybrid entries, and chains, plus logo...31.1BambooHR Directory APIEmployee directory31.0BambooHR REST APIRESTful HTTPS API for accessing and manipulating employee data, directories, time-off, reports, and other B...31.0Blubrry Podcast Network APIThe Blubrry Podcast Network API provides access to user subscriptions with show management, episode metadat...30.2APIContext Directory APIThe Directory API from APIContext — 2 operation(s) for directory.29.1KnightFrank Api v3The corporate search service behind knightfrank.com and knightfrank.co.uk, titled "KnightFrank Api v3" by i...29.1SpaceAPI Directory APISpaceAPI directory listing operations26.8
Emerging 7 Early or largely undocumented
Let's Encrypt Directory APIDiscovery document listing ACME resources26.0Casdoor LDAP ServerCasdoor provides an LDAP server interface so that legacy applications and infrastructure components requiri...25.2Linea Ecosystem DirectoryPublic directory of dApps, infrastructure providers, wallets, indexers, and services building on Linea — su...24.5Applied Epic Contacts APICentralize contact data for clients, prospects, carriers, and vendors, with filtering by classification, em...20.5Subsplash People APIPeople Sync surface for unifying member and contact records across systems, plus Single Sign-On (SSO) user ...17.2Intermedia Address Book APIThe Intermedia Address Book API aggregates user contacts from multiple sources into a unified directory acc...16.2BIA Tribal Leaders DirectoryA searchable directory published by the Bureau of Indian Affairs of elected leaders and contact information...12.8
Minimal 1 Almost no public developer surface
OpenLDAP Directory ServiceLDAP v3 protocol interface provided by the slapd directory server for reading, writing, and managing hierar...8.2

Score breakdown

Frequency
56.5
log-scaled weighted occurrences
Breadth
1.9
spread across providers
Quality lift
38.9
mean composite of providers using it
Cohesion
6.0
strength of nearest seed neighbor

Related tags

LDAP 5 co-occurrences People 10 co-occurrences Courses 8 co-occurrences SAML 5 co-occurrences University 11 co-occurrences Research Data 5 co-occurrences Higher Education 11 co-occurrences Identity 18 co-occurrences

Where this tag comes from

Api tag60
Provider tag17
Openapi tag22
Openapi op tag106

Cohort brief

Auto-generated

The 71 providers in the APIs.io catalog tagged Directory, scored on the Kin Score. Every figure below is computed from the catalog — nothing here is written.

Providers
71
all scored
Mean Kin Score
33.2
+12.5 vs catalog 20.7
Mean Agent Readiness
19.5
+9.8 vs catalog 9.7
Spread
2.6–75.7
median 33.9 · σ 15.7
How the 71 split by band
Exemplar 1Strong 5Developing 19Thin 25Emerging 13Minimal 8
Facet averages, against the whole catalog
FacetThis cohortCatalogDifferenceScored
Contract Quality 37.9 17.5 +20.4 71
Developer Ergonomics 30.5 17.9 +12.6 71
Access Clarity 31.3 22.3 +9 71
Operational Transparency 19.3 11.3 +8 71
Discoverability 67 60.4 +6.6 71
Contract Governance 9.5 6.4 +3.1 71

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) 23% 16% +7
MCP server (first-party) 10% 7% +3
Agent Skills 0% 0% 0
OAuth scopes 27% 9% +18
Security 99% 88% +11
Arazzo workflows 4% 2% +2
Governance rules 30% 13% +17

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 SendPulse 75.7
  2. 2 Syllable 64.8
  3. 3 Shodan 63.6
  4. 4 C1 55.4
  5. 5 Eligible 55.4
  6. 6 Tenable 54.7
  7. 7 University of Wisconsin-Madison 51.6
  8. 8 NHS England 51.5
  9. 9 Certifyos 51.1
  10. 10 KU Leuven 50.7
Top by Agent Readiness
  1. 1 SendPulse 55.8
  2. 2 Tyro Payments 44.7
  3. 3 NHS England 39.7
  4. 4 Tenable 36.7
  5. 5 Columbia University 36
  6. 6 Syllable 34.3
  7. 7 University of Auckland 33.1
  8. 8 Certifyos 32.7
  9. 9 NHS Digital 32.3
  10. 10 Wazo 32.1
All 71 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.

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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/directory"
All tags 
curl "https://apis.io/api/v1/tags?limit=25"
As a scored cohort 
curl "https://apis.io/api/v1/cohorts/tag/directory"
The distribution (Pro) 
curl "https://apis.io/api/v1/cohorts/tag/directory/stats" \
  -H "X-API-Key: $APIS_IO_KEY"

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