stale · -1.0 capability resource

Subjects

Score 15.0 / 100 1 providers +17 via APIs 18 APIs Search apis.io →
Business capabilities this tag reaches
Information & Data Management 1 Compliance Management 1 Media, Creator & Social 1

Providers using this tag (1)

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

Emerging 1 Early or largely undocumented
Open LibraryAuthorsBooksCatalogCovers1 API22.4

APIs with this tag (18)

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 2 Complete, well-documented, and agent-ready
Confluent Subjects APIThe Subjects API from Confluent — 1 operation(s) for subjects.87.2Amazon Web Services Subjects APIThe Subjects API from Amazon Web Services — 1 operation(s) for subjects.68.5
Strong 3 Solid coverage with minor gaps
University of Waterloo Subjects APIThe Subjects API from University of Waterloo — 3 operation(s) for subjects.64.0Factset Subjects APIThe Subjects API from Factset — 2 operation(s) for subjects.60.5Osano Subjects APIThe Subjects API from Osano — 9 operation(s) for subjects.54.3
Developing 5 Usable, with meaningful gaps to close
PhotoPrism Subjects APIThe Subjects API from PhotoPrism — 3 operation(s) for subjects.52.5Pryon Subjects APIThe Subjects API from Pryon — 6 operation(s) for subjects.47.9Statistics Poland (GUS) Subjects APIThe Subjects API from Statistics Poland (GUS) — 4 operation(s) for subjects.42.9University of California, Santa Barbara Subjects APIThe Subjects API from University of California, Santa Barbara — 2 operation(s) for subjects.42.8OSF Subjects APISubjects endpoints provide access to the taxonomy used for categorizing OSF resources such as nodes, prepri...42.4
Thin 6 Limited public surface area
Elements Live Subjects APIThe Subjects API from Elements Live — 5 operation(s) for subjects.36.4Confluent Schema Registry Subjects APIThe Subjects API from Confluent Schema Registry — 6 operation(s) for subjects.33.5VivaLNK Subjects APISubjects (patients / study participants) enrolled for monitoring.31.7OpenMeter Subjects APISubjects that usage is metered against.31.3Cardiff University Subjects APIReference list of subject codes. 1 operation(s), from Cardiff's own LookupsApi contract on the api.data.car...30.6Teachworks Subjects APISubjects taught.28.7
Emerging 2 Early or largely undocumented
Open Library Subjects APIRetrieve books, works, and metadata grouped by subject (genre, topic, place, time, person) with paging and ...22.4Medrio Subjects APICreate, list, and update clinical trial subjects within a study; manage Medrio and study subject identifier...16.9

Companies reaching this through an API (17)

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

Amazon Web Services Cardiff University Confluent Confluent Schema Registry Elements Live Factset Medrio OpenMeter Osano OSF PhotoPrism Pryon Statistics Poland (GUS) Teachworks University of California, Santa Barbara University of Waterloo VivaLNK

Score breakdown

Frequency
41.8
log-scaled weighted occurrences
Breadth
0.0
spread across providers
Quality lift
22.4
mean composite of providers using it
Cohesion
0.4
strength of nearest seed neighbor

Related tags

Event 5 co-occurrences User 5 co-occurrences Company 5 co-occurrences

Where this tag comes from

Api tag18
Provider tag1
Openapi tag16
Openapi op tag59

Work with this as data

Every tag here is available over the APIs.io API and to AI agents over MCP.

MCP server

One button, every client — Claude, Cursor, VS Code and the rest.

https://apis.io/mcp

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

curl for this page
This tag 
curl "https://apis.io/api/v1/tags/subjects"
All tags 
curl "https://apis.io/api/v1/tags?limit=25"
As a scored cohort (paid plan)
The distribution (Pro)

Calls without X-API-Key need no key. Calls with it need a paid plan — get a key.

Get an API key

Free tier, no form to fill in. Signing in shares your email address with us — we store it to create your key and to recognise you if you sign in with another provider. See our Privacy Policy and Terms.

GitHub Google LinkedIn

A second provider on the same verified email joins the account you already have.