stale · 0.0 market industry

Undocumented

Score 14.7 / 100 0 providers +21 via APIs 26 APIs Search apis.io →
A resource tag, not a market

No company describes its business as “Undocumented”. It names something an API does — and 21 providers reach it through a specification or operation tag. The APIs below are the answer to this tag; the companies are not.

Providers using this tag (0)

No company classifies itself here — see the resource-tag note above, and the APIs below.

APIs with this tag (25)

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
NordVPN Public Server APIUnauthenticated JSON API that NordVPN's own clients and the open-source Linux client use to enumerate the s...54.7
Developing 3 Usable, with meaningful gaps to close
api.univie.ac.at (authenticated gateway)An API gateway on the university's apex domain. Probed 2026-08-30 on /, /v1, /api, /docs, /openapi.json, /s...43.5IIT Kharagpur ERP Continuing Education Programme Brochure EndpointThe only unauthenticated endpoint on the IIT Kharagpur estate that the institute wrote itself. The ERP at e...41.9Swift Navigation Web Data EndpointsFirst-party, keyless JSON endpoints on the Swift Navigation website that power the Skylark User Portal and ...40.2
Thin 10 Limited public surface area
api.uniandes.edu.coAn undocumented API host on the university's own registrable domain. It resolves through Cloudflare and ans...38.7Website Global ObjectA public, keyless JSON endpoint served by the university's own website CMS at www.wgtn.ac.nz/api/globalobje...36.1Offerpad Helix API (private customer backend)Offerpad's real transaction API, and it is closed. Discovered on 2026-07-26 as the API_URL constant compile...33.8ASU Course Catalog microservices APIASU's own course, class and subject search API, running at eadvs-cscc-catalog-api.apps.asu.edu/catalog-micr...31.8myASU Data Platform API (api.myasuplat-dpl.asu.edu)ASU's internal data-platform API gateway, the issuer of the OAuth scopes the course-catalog application req...31.8UOW Handbook course catalog API (undocumented)The UOW Handbook at courses.uow.edu.au is a Next.js application served from CloudFront on UOW's own registr...30.9Fudan University Social Science Data Platform (复旦大学社会科学数据平台)Fudan's institutional research data repository, operated by the Research Center for Social Sciences. It mov...30.4Fudan University Unified Identity — OpenID ConnectThe OpenID Connect provider Fudan operates for campus single sign-on at id.fudan.edu.cn. Issuer https://id....30.4Level Mobile Application BackendThe undocumented HTTPS backend the Level Home iOS and Android applications talk to. It is an AWS API Gatewa...30.0IIT Delhi Departmental Site Platform APIUndocumented JSON API behind the shared React/Express site platform IIT Delhi runs across departmental and ...26.8
Emerging 9 Early or largely undocumented
Carrum Health Platform ServicesThe internet-facing REST services that power the Carrum Health member application (my.carrumhealth.com): co...25.4DCAA Field Audit Office Branch Locator APIThe public JSON backend of DCAA's Field Audit Office Branch Locator. It resolves the DCAA field audit offic...25.4JobGet Platform APIThe production API host that backs the JobGet mobile applications and employer web experience. The host is ...22.9CTM Portal Host APIThe private back-end API for CTM Portal, CTM's single sign-on customer portal. It is not documented, not an...22.8SaskPower Live Outage JSON FeedThe undocumented JSON endpoint behind SaskPower's public outage map, found in the markup of the Outage Map ...20.2SaskPower Outage Map KML FeedThe KML data feed behind SaskPower's public outage map, referenced directly in the markup of the Outage Map...20.2SaskPower Power Use Dashboard DataThe undocumented JSON endpoint behind SaskPower's public "Where Your Power Comes From" page. A single anony...20.2SaskPower Smart Meter Installation Map KML FeedThe KML data feed behind SaskPower's Smart Meter Installation Map, requested by the site's own SP.scripts.j...20.2Resy Internal Web/Mobile API (Undocumented)Resy's web and mobile clients communicate with an internal API at api.resy.com. This API is not publicly do...16.1
Minimal 2 Almost no public developer surface
Let's Do This GraphQL (undocumented)Live GraphQL endpoint backing the Let's Do This consumer marketplace. Discovered by probe, not published as...8.6Exelon Utilities Content API (Internal)Shared Exelon Utilities backend (eudapi.peco.com) referenced by the PECO web portal's runtime configuration...4.2

Companies reaching this through an API (21)

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

Arizona State University Carrum Health Corporate Travel Management Defense Contract Audit Agency Empatica Fudan University Indian Institute of Technology Delhi Indian Institute of Technology Kharagpur JobGet Let's Do This Level Home Nord Security Offerpad PECO Energy Resy SaskPower Swift Navigation University of Los Andes Colombia University of Vienna University of Wollongong Victoria University of Wellington

Score breakdown

Frequency
36.8
log-scaled weighted occurrences
Breadth
0.0
spread across providers
Quality lift
24.9
mean composite of providers using it
Cohesion
3.3
strength of nearest seed neighbor

Related tags

Research Information 5 co-occurrences eduGAIN 6 co-occurrences Course Catalog 5 co-occurrences Tenant 5 co-occurrences Research Repository 6 co-occurrences Shibboleth 6 co-occurrences University 8 co-occurrences Identity Federation 7 co-occurrences

Where this tag comes from

Api tag26

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Tools for tags

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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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Call it yourself

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This tag 
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As a scored cohort 
curl "https://apis.io/api/v1/cohorts/tag/undocumented"
The distribution (Pro) 
curl "https://apis.io/api/v1/cohorts/tag/undocumented/stats" \
  -H "X-API-Key: $APIS_IO_KEY"

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