niche · -0.7 capability

Login

Score 19.6 / 100 0 providers +78 via APIs 81 APIs Search apis.io →

Business capabilities this tag reaches

A resource tag, not a market

No company describes its business as “Login”. It names something an API does — and 78 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 (81)

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 11 Complete, well-documented, and agent-ready

Strong 9 Solid coverage with minor gaps

Unified.to Authentication APIUnified authentication API supporting OAuth 2 OpenID with 140+ identity provider integrations for adding us...63.9 Observe Login APIManage api tokens. Learn more about [api tokens](https://docs.observeinc.com/en/latest/content/reference/Ob...63.0 Aeris Login APIThe Login API from Aeris — 3 operation(s) for login.61.9 ScienceLogic Login APIThe login endpoint is used by the UI to authenticate a user. On successful login, it will set a session coo...58.0 FOLIO Login APIThe login API from FOLIO — 6 operation(s) for login.57.6 EPA — U.S. Environmental Protection Agency Login APIThe Login API from EPA — U.S. Environmental Protection Agency — 3 operation(s) for login.57.0 mParticle Login APIThe Login API from mParticle — 1 operation(s) for login.56.9 Tower Login APIThe Login API from Tower — 3 operation(s) for login.55.5 Level2 Login APIThe Login API from Level2 — 1 operation(s) for login.55.0

Developing 31 Usable, with meaningful gaps to close

Thin 22 Limited public surface area

Emerging 8 Early or largely undocumented

DEGIRO Login APIThe login API from DEGIRO — 1 operation(s) for login.26.1 Kakao Login (OAuth 2.0) APIKakao Login is Korea's most widely used social-identity provider, built on OAuth 2.0 / OpenID Connect. The ...25.6 ARMO Login APIThe Login API from ARMO — 7 operation(s) for login.25.2 Login With Grab (Grab ID) APIGrab ID is Grab's OAuth 2.0 / OpenID Connect identity provider. Partner applications use the Login With Gra...25.2 Race Entry Login APIThe Login API from Race Entry — 1 operation(s) for login.23.8 NoBueno Login APIThe login API from NoBueno — 1 operation(s) for login.23.0 KakaoPay Login APIREST API providing KakaoPay authentication services including token issuance, token refresh, user informati...14.0 Naver Login (OAuth 2.0) APINaver Login is an OAuth 2.0 identity provider used by Korean web and mobile apps to authenticate users with...11.6

Companies reaching this through an API (78)

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

123FormBuilder 1Kosmos Adobe Suite Adyen Aeris Agora Data AlgoSeek Apache Airflow Automile Automileab Beacon Roofing Supply Bonjoro Border0 Centaur Labs CHAOSS Check Point Chulalongkorn University Cisco XDR Cubist Curiosity DecisionLink DEGIRO DIPS Edge Impulse EPA — U.S. Environmental Protection Agency Flatcar Container Linux FlowMate FOLIO FusionAuth Grab Hanko IBM MQ Incode Indian Institute of Technology Bombay Jitterbit Kakao KakaoPay Kevel Level2 Lokki Matomo Matrix Mile mParticle Naver Neynar NoBueno Observe Orange Logic Oxide

Show all 78 companies ↓

Score breakdown

Frequency

59.1

log-scaled weighted occurrences

Breadth

0.0

spread across providers

Quality lift

20.8

mean composite of providers using it

Cohesion

4.4

strength of nearest seed neighbor

Where this tag comes from

Api tag80

Openapi tag71

Openapi op tag155

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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/login"

All tags

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As a scored cohort

curl "https://apis.io/api/v1/cohorts/tag/login"

The distribution (Pro)

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  -H "X-API-Key: $APIS_IO_KEY"

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