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 3 Complete, well-documented, and agent-ready

Token.io JavaScript SDKOfficial Token.io JavaScript SDK for Node.js and browser environments interacting with the Token System and...73.3 Browser Use Browsers APIThe Browsers API from Browser Use — 3 operation(s) for browsers.68.9 New Relic Browser APIThe New Relic Browser API provides JavaScript methods for extending and customizing browser monitoring data...68.1

Strong 2 Solid coverage with minor gaps

BrowserStack Browsers APIOperations describing supported browsers and devices.66.1 Amazon Connect Streams SDKAmazon Connect Streams is a browser-based integration API and JavaScript SDK that enables embedding and con...54.8

Developing 10 Usable, with meaningful gaps to close

API Snap Browser APIHeadless browser operations like screenshot capture49.9 Visio JavaScript APIJavaScript API for building add-ins and extending Visio functionality in the browser with access to documen...48.8 Kernel Browsers APICreate and manage browser sessions.48.6 Sauce Labs Platform APIRetrieve information about Sauce Labs supported automation environments, browser/OS combinations, and overa...47.4 Chrome Extensions APIAPIs for building Chrome browser extensions.46.2 PartyKit PartySocket (Client API)Browser and runtime client library for connecting to a PartyKit server over WebSockets. Wraps the standard ...43.7 Microsoft Edge Browser APIBrowser-level information and management42.8 Firecrawl Browser APIThe Browser API from Firecrawl — 3 operation(s) for browser.41.8 Braintree JavaScript Client SDKThe Braintree JavaScript Client SDK enables secure collection of payment information directly in the browse...40.8 Selenium WebDriverWebDriver is a browser automation framework that accepts commands and sends them to a browser. It is implem...40.6

Thin 12 Limited public surface area

Split JavaScript SDKThe Split JavaScript SDK provides client-side integration for feature flag evaluation in browser-based appl...39.0 TensorFlow.js APIA JavaScript library for training and deploying ML models in the browser and on Node.js.38.2 Scrapybara Browser APIThe Browser API from Scrapybara — 4 operation(s) for browser.37.3 Polygon ID JavaScript SDKThe JS-SDK enables browser-based applications, extensions, and dApps to implement identity wallet functiona...36.8 Authsignal Browser SDKJavaScript / TypeScript browser SDK wrapping the Client API and WebAuthn / passkey ceremonies for web appli...36.7 Lucid Embed SDK & APIEmbed Lucid diagrams and whiteboards into external apps with read-only or interactive viewing, and listen t...36.0 XMTP JavaScript/TypeScript SDKClient SDK for browsers and Node.js enabling applications to send and receive end-to-end encrypted messages...36.0 Brave BrowserPrivacy-first Chromium-based browser for Windows, macOS, Linux, Android, and iOS, with built-in tracker and...34.8 Kanban Tool Browser SDKBrowser-side SDK for customizing the Kanban Tool interface. Enables adding custom buttons to context menus,...33.0 Loom recordSDKEmbed Loom's recording experience directly into your web app. The recordSDK lets users record screen, mic, ...32.4 Ultraleap Tracking WebSocketAn open-source WebSocket server from Ultraleap that restores the LeapJS-compatible surface removed when Lea...29.7 Hotjar JavaScript SDKThe Hotjar JavaScript SDK (@hotjar/browser) is an npm package that provides a programmatic interface for in...29.2

Emerging 9 Early or largely undocumented

Web Push APIAn IETF-standardized push system for the web, comprising the W3C Push API (browser-side subscription), the ...25.0 WebTransportA modern web API built on HTTP/3 and QUIC providing bidirectional and unidirectional streams plus unreliabl...25.0 Unreal Pixel StreamingPixel Streaming streams an Unreal Engine application running on a server to remote browser clients over Web...24.2 TrickyBird Agent SurfaceAgent-native interfaces for TrickyBird: a structured llms.txt and a documented WebMCP in-page tool surface....24.1 Phantom Browser SDKFramework-agnostic Browser SDK for integrating Phantom into vanilla JavaScript or TypeScript web apps. Wrap...23.4 RestfoxRestfox is a lightweight, offline-first web HTTP client for testing REST APIs, similar to Postman but brows...22.4 Gem Chrome ExtensionBrowser extension that lets recruiters source candidates from LinkedIn and other sites, capture contact dat...19.4 Dia BrowserAI-native browser for macOS (Apple Silicon) that turns browsing into a working surface for an embedded assi...17.5 SpecLynx EditorA browser-based OpenAPI editor with real-time validation, smart autocompletion, and live preview. No instal...16.2

Minimal 3 Almost no public developer surface

React DOM APIThe react-dom package provides DOM-specific methods for React.10.7 Servo APIProgrammatic access to Servo web rendering engine APIs, embedding interfaces, and browser component tools.10.4 Honorlock Elements & Integration SDKBrowser-side Integration SDK and Elements UI components that embed the Honorlock exam-taker experience into...8.9

Companies reaching this through an API (30)

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

Score breakdown

Frequency

48.8

log-scaled weighted occurrences

Breadth

0.6

spread across providers

Quality lift

31.3

mean composite of providers using it

Cohesion

7.1

strength of nearest seed neighbor

Where this tag comes from

Api tag39

Provider tag20

Openapi tag6

Openapi op tag19

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

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Browser

Providers using this tag (20)

APIs with this tag (39)