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 12 Complete, well-documented, and agent-ready

Salesforce Aura ComponentsSalesforce Aura Components is the legacy JavaScript component framework for building dynamic web applicatio...83.3 Salesforce Lightning Web Components (LWC)Lightning Web Components (LWC) is Salesforce's standards-based JavaScript framework for building UI compone...83.3 RudderStack Transformations APIThe RudderStack Transformations API manages user-defined transformation functions (JavaScript, with Python ...80.2 Didomi Web SDKThe Didomi Web SDK is the browser-side library that renders consent notices, preference centers, and privac...77.1 Iterable React Native SDKThe Iterable React Native SDK enables developers to integrate Iterable's marketing automation capabilities ...73.9 Iterable Web SDKThe Iterable Web SDK enables developers to integrate Iterable's marketing automation capabilities directly ...73.9 Google Ads ScriptsJavaScript-based scripting interface for programmatically managing and querying Google Ads data directly in...70.5 New Relic Browser APIThe New Relic Browser API provides JavaScript methods for extending and customizing browser monitoring data...68.8 Matomo CrashAnalytics APIThe Matomo CrashAnalytics API exposes 31 operations of the Matomo Reporting API (module `CrashAnalytics`). ...67.3 Matomo CustomJsTracker APIThe Matomo CustomJsTracker API exposes 1 operations of the Matomo Reporting API (module `CustomJsTracker`)....67.3 Oracle Siebel Open UI JavaScript APIClient-side JavaScript API for customizing the Siebel Open UI user interface. The API provides well-defined...67.1 Koala Web Pixel (JavaScript SDK)The client-side pixel loaded from cdn.getkoala.com/v1/{key}/sdk.js. Exposes ko.identify(), ko.track(), ko.q...67.0

Strong 14 Solid coverage with minor gaps

Playable Campaign SDKBrowser-side JavaScript SDK (`@playable-marketing/campaign-sdk`) that exposes a promise-based `window.sdk` ...64.3 Raygun Source Maps APIUpload, list, retrieve, update, and delete JavaScript source maps for symbolicating minified front-end stac...63.1 Redox HL7 v2 Libraryredox-hl7-v2 is Redox's open-source JavaScript library for parsing and generating HL7 v2 messages, useful f...62.1 Clerk.js Client LibraryClerk.js is the browser-side JavaScript library for embedding Clerk.io recommendation slots, search, and em...59.9 Fasten Connect Quickstart SampleMIT-licensed JavaScript starter project that demonstrates an end-to-end Fasten Connect integration — creden...59.2 Sketchfab Viewer APIClient-side JavaScript library for controlling an embedded Sketchfab 3D viewer. Exposes camera control, scr...58.9 Moov.jsMoov.js is a client-side JavaScript SDK designed to streamline interactions with the Moov API while keeping...58.1 RB2B Pixel and Destination WebhooksThe RB2B JavaScript pixel installed in a site header (or via Google Tag Manager / Segment / RudderStack / S...57.7 Truework.js (Truework Direct)Truework.js is the client-side JavaScript library that powers Truework Direct, the borrower-driven (consume...56.6 Adobe Photoshop UXP Plugin APIThe modern plugin development platform for Photoshop, replacing the legacy CEP framework. UXP (Unified Exte...55.8 Adobe Photoshop UXP ScriptingA modern scripting system for Photoshop that allows developers to execute standalone JavaScript files with ...55.8 Digioh JavaScript APIClient-side browser API exposed by the Digioh widget runtime once the Digioh JavaScript tag is installed on...55.1 Livepeer JavaScript/TypeScript SDKOfficial TypeScript/JavaScript SDK (@livepeer/ai or livepeer) for the Livepeer Studio REST API and AI endpo...54.6 Sailthru JavaScript API (Personalization Engine)The client-side Sailthru JavaScript tag (spm.v1.min.js, served from ak.sail-horizon.com) used for on-site b...54.4

Developing 72 Usable, with meaningful gaps to close

MapKit JSEmbed interactive Apple Maps on websites.52.8 CSG Forte.jsForte.js is a JavaScript library for secure browser-based payment tokenization. It enables web applications...52.4 Merchant Sample (JavaScript)Simple JavaScript merchant checkout example for Token.io.52.0 Token.io JavaScript SDKOfficial Token.io JavaScript SDK for Node.js and browser environments interacting with the Token System and...52.0 npm CLIThe npm CLI is the official command-line interface for the npm package manager, providing developers with t...50.8 npm Registry APIThe npm Registry API provides programmatic access to the npm package registry, the largest software registr...50.8 App Studio Web SDKWeb SDK for building custom applications using HTML5 and JavaScript within the Eikon App Studio environment...50.6 Refinitiv Data Library for TypeScriptTypeScript and JavaScript library providing ease-of-use interfaces for accessing financial data and service...50.6 Luciq React Native SDK (formerly Instabug-React-Native)React Native plugin wrapping the native iOS and Android Luciq SDKs. Adds Expo integration, CodePush / Over-...50.3 CustomerOS Website TrackerClient-side JavaScript tracker that captures page views and custom events, exposes window.cos.identify() fo...49.9 Neon Serverless DriverThe Neon Serverless Driver is a low-latency JavaScript and TypeScript driver that enables querying Neon Pos...49.9 SAP Analytics Cloud Analytics Designer APIJavaScript-based API for building interactive analytic applications in SAP Analytics Cloud Analytics Design...49.9 SAP Lumira Discovery Extensions APIJavaScript API for creating custom visualizations and extensions in SAP Lumira.49.9 Adobe Express Embed SDKA JavaScript SDK for embedding Adobe Express creative editing tools directly into web applications. The SDK...49.7 Adobe UXP (Unified Extensibility Platform)The Unified Extensibility Platform (UXP) is Adobe's modern cross-app plugin development framework replacing...49.7 Apollo Client (Web)Apollo Client is a comprehensive state management library for JavaScript and TypeScript applications. It is...49.4 Apollo ServerApollo Server is an open-source, spec-compliant GraphQL server compatible with any GraphQL client. It is th...49.4 Heidi Widget SDKEmbeddable JavaScript widget for dropping Heidi's ambient documentation experience directly into a web-base...49.4 Tidio Widget SDKJavaScript SDK for embedding and customizing the Tidio chat widget on websites. Supports user tracking, cus...48.8 WeChat Mini Programs Client APIClient-side JavaScript API exposed inside the WeChat runtime to Mini Programs and Mini Games. Covers networ...48.8 Felt JavaScript SDKJavaScript SDK for embedding, controlling, and extending Felt maps in external web applications. Supports t...48.4 Looker Studio Community VisualizationsCommunity Visualizations allow developers to build and share custom JavaScript visualizations in Looker Stu...48.4 OptinMonster JavaScript Events APIA client-side event API exposed by the OptinMonster embed script (served from a.omappapi.com/app/js/api.min...48.1 Survicate JavaScript SDKThe Survicate JavaScript SDK enables web-based feedback collection on websites and web applications. It pro...47.9 BrowserStack JavaScript Testing APIThe BrowserStack JavaScript Testing API provides HTTPS-based access to run JavaScript unit tests across 300...47.6 SAP HANA XS Engine APIExtended Application Services (XS) for building applications directly on SAP HANA.47.6 Amazon Connect Streams SDKAmazon Connect Streams is a browser-based integration API and JavaScript SDK that enables embedding and con...47.3 Kongregate Client JavaScript APIBrowser-side JavaScript API loaded by script tag from cdn1.kongregate.com. Exposes kongregate.services.* fo...47.1 Chroma JavaScript ClientThe Chroma JavaScript and TypeScript Client is a first-party SDK for interacting with Chroma from JavaScrip...46.8 Runway Node.js SDKThe Runway Node.js SDK provides a JavaScript and TypeScript library for integrating with the Runway API. Su...46.8 Tableau Embedding APIJavaScript API for embedding Tableau visualizations in web applications with advanced interaction capabilit...46.6 Tableau Extensions APIThe Tableau Extensions API allows developers to create dashboard extensions and viz extensions that users c...46.6 Tableau Web Data ConnectorThe Tableau Web Data Connector (WDC) provides an SDK for building connectors to any data accessible over HT...46.6 Qlik Embedding APIJavaScript API for embedding Qlik Sense visualizations and mashups into web applications.46.4 Adobe Illustrator CEP Extensions APIThe Adobe Illustrator Common Extensibility Platform (CEP) allows developers to build panels and extensions ...46.3 Convex JavaScript SDKThe Convex JavaScript SDK is a collection of TypeScript/JavaScript packages for building applications on th...46.2 Shift4 JavaScript LibraryThe Shift4 JavaScript library provides secure, customizable HTML/CSS components for building on-page paymen...46.2 Neo4j GraphQL LibraryThe Neo4j GraphQL Library is an open source JavaScript library that enables rapid development of GraphQL AP...46.1 Neo4j JavaScript DriverThe Neo4j JavaScript Driver is the official library for interacting with Neo4j graph databases from JavaScr...46.1 Gemini Node.js SDKNode.js client library for the Gemini API.46.0 Dataiku JavaScript APIJavaScript API for building custom web applications that read from Dataiku datasets within DSS.45.8 Sandpack Embed ToolkitSandpack is an open-source component toolkit for creating live-running code editing experiences powered by ...45.7 Clerk JavaScript SDKOfficial ClerkJS browser library and monorepo of framework adapters (Next.js, React, Expo, React Router, As...45.1 GOV.UK Notify Node.js ClientOfficial Node.js client library for the GOV.UK Notify API for sending government notifications via email, S...45.0 WordPress Block Editor APIThe Block Editor API (Gutenberg) enables developers to create custom blocks, block patterns, block template...44.7 Bread JavaScript SDKBrowser-side JavaScript SDK that exposes the BreadPayments object for rendering the Bread modal, embedded p...44.3 LanceDB TypeScript SDKNode.js / TypeScript / JavaScript client library for LanceDB OSS, Cloud, and Enterprise. Bundles native bin...44.2 AI21 TypeScript / JavaScript SDKOfficial TypeScript and JavaScript client for the AI21 Studio API, with typed request and response models a...43.9 Excel JavaScript APIOffice Add-ins API for building custom functionality within Excel using JavaScript and TypeScript.43.2 Refinitiv Data Platform LibrariesSuite of ease-of-use libraries and interfaces for Python, TypeScript and JavaScript providing access to str...42.9 Commercetools TypeScript SDKThe commercetools TypeScript SDK is the official client library for interacting with the Composable Commerc...42.4 Split JavaScript SDKThe Split JavaScript SDK provides client-side integration for feature flag evaluation in browser-based appl...42.0 Split React SDKThe Split React SDK provides React-specific components and hooks for integrating feature flags including a ...42.0 Safe API Kit (TypeScript SDK)Official TypeScript client SDK for the Safe Transaction Service API. Wraps all Transaction Service endpoint...41.9 make-request-js (Sideko Runtime)Modern TypeScript HTTP client for browser and Node.js environments, used as the runtime by Sideko-generated...41.8 Sideko Node.js SDKThe Sideko Node.js SDK provides TypeScript and JavaScript bindings for the Sideko API. Generated by Sideko'...41.8 Electric TypeScript ClientThe official @electric-sql/client NPM package that wraps the HTTP Sync API with two high-level primitives: ...41.7 Paidy CheckoutJavaScript-based checkout integration that enables consumers to authenticate with Paidy and authorize payme...41.6 Deno Runtime APIThe Deno Runtime API is the built-in namespace of globals and modules available to all programs running on ...41.5 turbopuffer TypeScript SDKOfficial TypeScript / JavaScript client library for the turbopuffer REST API, Stainless-generated and publi...41.5 Looker Extension Framework APIThe Looker Extension Framework provides APIs and SDKs for building custom extensions that run inside the Lo...41.3 Glia Visitor JS SDKThe public browser SDK for embedding Glia engagements into a web property - queueing for engagement, chat, ...41.0 Bunny.net Scripting / Edge Compute APIEdge-compute API for deploying and managing Bunny Edge Scripts - JavaScript/TypeScript functions that run o...40.9 Medusa JS SDK (@medusajs/js-sdk)Official TypeScript / JavaScript SDK wrapping the Store and Admin REST APIs - typed clients, auth helpers, ...40.7 Sync Labs TypeScript SDKOfficial TypeScript/Node.js SDK for integrating the Sync Labs API. Supports Node.js 18+. Install via npm in...40.7 hCaptcha JavaScript WidgetThe hCaptcha JS widget renders the visible or invisible challenge on a page and produces a response token o...40.5 Node.js Driver for SQL ServerNode.js driver (tedious/mssql) for connecting JavaScript and TypeScript applications to SQL Server and Azur...40.5 Knotch Measurement Unit APIBrowser-side JavaScript API exposed by the Knotch tag for controlling Measurement Units on a page at runtim...40.2 Val Town TypeScript SDKOfficial TypeScript and JavaScript client library for the Val Town REST API, autogenerated from the OpenAPI...40.1 Akashjs - Akash SDK (JavaScript / TypeScript)Official JavaScript / TypeScript SDK for building Akash applications and tooling - SDL parsing, wallet sign...39.9 Docling TypeScriptTypeScript/JavaScript types and helpers for consuming Docling output (DoclingDocument JSON, DocTags) in Nod...39.8 Authsignal Browser SDKJavaScript / TypeScript browser SDK wrapping the Client API and WebAuthn / passkey ceremonies for web appli...39.3

Thin 75 Limited public surface area

Model-Driven Apps Client APIClient API reference for model-driven apps providing JavaScript libraries for form scripting, UI manipulati...39.1 Nomic TypeScript SDKOfficial TypeScript / JavaScript client for the Nomic Atlas API.39.0 saleor-sdk (TypeScript / JavaScript)Official TypeScript / JavaScript SDK wrapping the Saleor GraphQL API for storefronts and Apps - typed opera...38.8 Tableau Embedding APIEmbed Tableau visualizations into web applications using modern web components with v3 of the Embedding API.38.8 Tableau Extensions APIBuild dashboard extensions that enable users to interact with data from other applications directly in Tabl...38.8 Typeform Embed SDKJavaScript embed SDK for inline / popup / fullscreen / sidetab / popover / slider experiences in your own w...38.7 CloudEvents JavaScript SDKThe official JavaScript SDK for CloudEvents provides libraries for producing and consuming CloudEvents in N...38.5 clob-client (TypeScript SDK)Official TypeScript / JavaScript SDK for the Polymarket CLOB API - typed clients, wallet integration (viem)...38.2 TensorFlow.js APIA JavaScript library for training and deploying ML models in the browser and on Node.js.38.2 @spree/sdk (TypeScript Store API SDK)Official TypeScript SDK for the Spree Store API - typed clients, auth helpers, and resource methods. Distri...37.7 Arcjet SDKsThe primary, supported interface to Arcjet. SDKs ship for Node.js, Next.js, Bun, Deno, SvelteKit, NestJS, R...37.3 Friendly Captcha WidgetThe Friendly Captcha widget is the JavaScript component that runs the proof-of-work puzzle in the browser a...37.2 JupyterLab Extension APIJavaScript and TypeScript API used to build JupyterLab extensions and plugins. JupyterLab is composed of pl...37.2 Red5 Pro WebRTC SDKThe Red5 Pro WebRTC SDK is a JavaScript library for integrating low-latency live streaming publish and subs...37.0 Microsoft Project JavaScript APIJavaScript API for building Office Add-ins that extend Microsoft Project desktop client. Enables reading ta...36.8 Microsoft Project Online CSOM APIClient-Side Object Model API for programmatic access to Project Online and Project Server. Provides .NET, S...36.8 Braintree JavaScript Client SDKThe Braintree JavaScript Client SDK enables secure collection of payment information directly in the browse...36.3 Polygon ID JavaScript SDKThe JS-SDK enables browser-based applications, extensions, and dApps to implement identity wallet functiona...35.9 AxelarJS SDKJavaScript/TypeScript SDK wrapping common cross-chain operations on the Axelar network. Key classes include...35.7 Triplit Client SDKTypeScript/JavaScript client library for interacting with Triplit databases locally and remotely. Provides ...35.7 Trieve TypeScript SDKOfficial TypeScript / JavaScript client library for the Trieve REST API.35.5 Manifold Claim WidgetsJavaScript widget library for embedding NFT minting and claim flows into any website or dApp. Served from c...35.3 GMX TypeScript SDKOfficial @gmx-io/sdk package shipping two clients: GmxSdk (SDK v1) for full read/write access via RPC, and ...35.1 Wix JavaScript SDKThe Wix JavaScript SDK provides modular npm packages for accessing Wix business solutions and site data fro...34.9 Penn SDK (JavaScript / Node)Open-source JavaScript/Node client from Penn Labs. Documentation is hosted on js.org, a community subdomain...34.8 Visio JavaScript APIJavaScript API for building add-ins and extending Visio functionality in the browser with access to documen...34.7 Formant Data SDK (JavaScript / TypeScript)Browser- and Node-side JavaScript / TypeScript SDK for building custom modules, custom views, and embedded ...34.4 Vectary Model APIJavaScript API for programmatic control of Vectary 3D scenes embedded on websites. The VctrModelApi class (...34.4 Ketch Web SDKTypeScript and JavaScript Web API and consent library for collecting, storing, and enforcing consent in bro...34.3 JasmineJasmine is a behavior-driven JavaScript testing framework that organizes test cases into describe/it suite ...34.2 JestJest is a zero-configuration JavaScript testing framework with built-in test suite runner, mocking, coverag...34.2 MochaMocha is a flexible JavaScript test suite framework supporting both synchronous and asynchronous API tests....34.2 Node.js Driver for SQL Server (tedious)Open-source JavaScript implementation of the TDS protocol for connecting to SQL Server from Node.js on Wind...34.2 SharePoint CSOM (Client-Side Object Model)Client-side object model for SharePoint that provides access to SharePoint objects through .NET managed or ...34.0 CloudKit JSCloudKit JS is Apple's JavaScript SDK that wraps the CloudKit Web Services REST API for browser apps. It pr...33.8 starknet.js SDKJavaScript / TypeScript SDK for Starknet — providers, accounts, contract classes, ABI parsing, transaction ...33.6 Jitsi Meet IFrame (External) APIBrowser-side JavaScript API (also called the External API) that embeds a Jitsi Meet conference into any web...33.5 lib-jitsi-meet (Low-Level JavaScript API)Low-level JavaScript library for building entirely custom video conferencing experiences on top of the Jits...33.5 Apache Guacamole JavaScript Client APIJavaScript client library for embedding the Guacamole remote desktop client in web applications, with APIs ...33.4 CypressCypress is a JavaScript end-to-end testing framework designed for modern web applications. Its test scripti...33.4 Playwright TestPlaywright is a cross-browser end-to-end testing framework from Microsoft that supports writing test script...33.4 Office Add-ins APIJavaScript API for building add-ins for Word, Excel, PowerPoint, and Outlook.33.3 Visteon Phoenix SDKThe Phoenix Software Development Kit provides development tools for building automotive infotainment applic...33.3 Excel JavaScript APIJavaScript API for building Excel add-ins and extensions.33.2 Turnstile Client WidgetThe Turnstile client widget renders the challenge in the browser. It is loaded via a script tag at challeng...33.1 Voyage AI TypeScript SDKOfficial TypeScript / JavaScript client for the Voyage AI REST API.33.1 what3words JavaScript SDKOfficial JavaScript wrapper around the what3words Public API for browser and Node.js applications.33.0 Credo APICredo (formerly Aries Framework JavaScript) is a TypeScript framework for building decentralized identity a...32.8 Paytm JS CheckoutBrowser JavaScript checkout that renders the Paytm payment page in two steps - server-side token creation f...32.8 HERE Maps API for JavaScriptBrowser SDK for embedding interactive maps, routing, search, and traffic visualizations in web applications.32.3 Olark JavaScript APIBrowser-side JavaScript API for controlling the Olark chat widget, including chatbox appearance and behavio...31.8 PlanetScale Serverless Driver for JavaScriptThe PlanetScale Serverless Driver for JavaScript is a Fetch API-compatible database driver designed for ser...31.7 Keynote JavaScript for Automation APIJavaScript-based automation interface for controlling Keynote on macOS using the Open Scripting Architectur...31.4 EAS Update APIOver-the-air update delivery service that pushes JavaScript bundle fixes directly to end users without requ...31.2 CyberConnect JavaScript SDKThe CyberConnect JavaScript SDK provides connect and disconnect (follow and unfollow) functions for writing...31.1 Tally Embed JSJavaScript embed library exposing Tally.openPopup, Tally.closePopup, Tally.loadEmbeds and event listeners f...30.7 nostr-tools JavaScript Librarynostr-tools is the de-facto JavaScript/TypeScript library for Nostr clients and bots. It implements event c...30.6 ArcGIS Maps SDK for JavaScriptThe ArcGIS Maps SDK for JavaScript enables web developers to build compelling 2D and 3D mapping application...30.5 Shopify Buy SDKThe Shopify JavaScript Buy SDK is a lightweight library that enables developers to integrate Shopify's stor...30.5 Fauna JavaScript DriverThe Fauna JavaScript Driver is the official client SDK for interacting with Fauna from JavaScript and TypeS...30.4 LlamaIndex TypeScript FrameworkLlamaIndex TypeScript is the JavaScript and TypeScript implementation of the LlamaIndex framework for build...30.3 PowerSync JavaScript / Web SDKClient SDK for JavaScript and browser environments using Wasm-backed SQLite. Provides a PowerSyncDatabase c...30.1 Apache CordovaApache Cordova provides a JavaScript plugin API for accessing native device capabilities (camera, GPS, file...29.7 XMTP JavaScript/TypeScript SDKClient SDK for browsers and Node.js enabling applications to send and receive end-to-end encrypted messages...29.7 BandChain.js SDKBandChain.js is a comprehensive TypeScript library for seamless interaction with BandChain and Cosmos SDK b...29.6 Office JavaScript API for PowerPointOffice JavaScript API namespace for building PowerPoint Add-ins that read, write, and manipulate slides, sh...29.1 AutoRest TypeScript GeneratorThe AutoRest TypeScript generator (@autorest/typescript) produces TypeScript and JavaScript client librarie...29.0 SitePal Avatar APISitePal is Oddcast's AI avatar platform. Speaking characters are embedded on a web page or app and controll...28.9 Push Chain Core SDKJavaScript/TypeScript SDK (@pushchain/core) for the Push Chain Universal Layer 1 blockchain. Exposes PushCh...28.7 JW Player JavaScript Player APIClient-side JavaScript API for controlling the JW Player embedded in web pages. Exposes methods and events ...28.6 Jumio Web SDKBrowser-based client SDK that hosts the verification UI, captures documents and selfies, and streams them t...28.3 Veriff Web (InContext / Hosted) SDKBrowser-based capture experience that embeds verification inside the customer's site (InContext) or runs as...28.3 Hotjar JavaScript SDKThe Hotjar JavaScript SDK (@hotjar/browser) is an npm package that provides a programmatic interface for in...27.7 QlikView JavaScript APIJavaScript API library for building websites containing QlikView content and for developing custom extensio...27.7 EasySize Fit Quiz JavaScript LibraryClient-side JavaScript library that embeds the EasySize "Fit Quiz" size-recommendation widget on a merchant...27.3

Emerging 57 Early or largely undocumented

StackBlitz JavaScript SDKA lightweight (3kB gzipped) JavaScript SDK that lets developers programmatically create, open, and embed St...26.1 TUF JavaScript ImplementationA JavaScript/TypeScript implementation of The Update Framework (TUF) for use in Node.js environments and br...26.0 CodePen Embed APIClient-side JavaScript API for rendering and lazy-loading embedded Pens on external web pages. Uses the glo...25.8 CodePen Prefill Embeds APIDeclarative embed API that transforms existing code blocks on a web page into live, interactive CodePen san...25.8 Three.js CoreThe Three.js core library provides the scene graph, cameras, lights, geometries, materials, textures, loade...25.7 Cucumber.jsJavaScript/Node.js implementation of Cucumber for running BDD tests in Node and the browser. Distributed as...25.5 MoleculerMoleculer is a fast, modern, and powerful microservices framework for Node.js. It provides built-in service...25.1 Vue.js Core APICore Vue.js composition and options API for building reactive user interfaces. Provides reactivity primitiv...24.8 Yarn CLIThe Yarn command-line interface — `yarn` — provides install, add, remove, up, run, exec, dlx, info, why, pa...24.7 Yarn ConstraintsYarn Constraints let you declare cross-workspace rules — required fields in `package.json`, forbidden depen...24.7 Yarn DLXThe yarn dlx command runs a package in an isolated temporary environment without permanently installing it....24.7 Yarn PatchFirst-class dependency patching — `yarn patch ` extracts a temporary editable copy of a dependency and `yar...24.7 Yarn Plug'n'PlayPlug'n'Play (PnP) is Yarn's alternative to the traditional node_modules folder. Yarn generates a single `.p...24.7 Yarn Plugin APIYarn ships with a full plugin API exposed by `@yarnpkg/core`. Plugins can register commands, resolvers, fet...24.7 Yarn ProtocolsYarn supports a rich set of dependency protocols beyond `npm:` semver — `git:`, `github:`, `file:`, `link:`...24.7 Yarn Version (Release Workflow)Yarn provides a release-workflow primitive for monorepos. Contributors declare per-workspace version bumps ...24.7 Yarn WorkspacesYarn was the first package manager built specifically around workspaces. `yarn workspace`, `yarn workspaces...24.7 Yarn Zero-InstallsZero-Installs commit Yarn's package cache (`.yarn/cache`) into the repository alongside the `.pnp.cjs` file...24.7 Rocket Pool Protocol API (rocketpool-js)The rocketpool-js library is a TypeScript/JavaScript client for the Rocket Pool protocol's deployed smart c...24.5 FastifyFastify is a fast and low-overhead web framework for Node.js, designed for building high-performance APIs a...23.9 Phantom Browser SDKFramework-agnostic Browser SDK for integrating Phantom into vanilla JavaScript or TypeScript web apps. Wrap...23.5 Atomic Transact SDKThe Transact SDK is the user-facing client that drives every Atomic flow — authentication, account selectio...23.3 MeteorMeteor is an open-source JavaScript platform providing a full-stack development environment with real-time ...23.1 AgentOps TypeScript SDKAgentOps' TypeScript SDK provides instrumentation for the OpenAI Agents SDK in Node.js applications, surfac...22.8 GraphQL Request GraphQL APIMinimal, type-safe GraphQL client API supporting HTTP and in-memory transports, custom scalars, file upload...22.7 Office JavaScript API for ExcelModern JavaScript API for creating Excel add-ins and automating Excel through web technologies.21.4 WasmEdge Node.js SDKThe WasmEdge Node.js SDK allows embedding and calling WebAssembly functions from Node.js applications. It p...21.3 YARN CLIThe Yarn command-line interface built on @yarnpkg/cli, providing commands for package installation, workspa...20.8 YARN Core APIThe @yarnpkg/core programmatic JavaScript/TypeScript API that allows applications to interact with Yarn pro...20.8 Patronus TypeScript SDKThe Patronus TypeScript SDK brings the same evaluation, tracing, and experiment workflows to Node.js and br...20.6 Enterprise Architect ScriptingBuilt-in scripting engine supporting JavaScript, JScript, and VBScript for automating tasks within Enterpri...20.5 Ronin Injected Provider APIBrowser JavaScript injected provider exposed by Ronin Wallet - lets dApps detect the wallet, request accoun...20.4 SuperTestSuperTest is a Node.js library for testing HTTP servers by providing a high-level abstraction for HTTP asse...20.3 Excel JavaScript APIJavaScript API for building Excel add-ins and extending Excel functionality in web and desktop environments...19.7 Apple Pay on the Web APIJavaScript APIs for implementing Apple Pay payments in Safari, supporting both the Apple Pay JS API and the...19.6 Safari Web Content APIWebKit APIs for interacting with web content, including JavaScript evaluation and DOM manipulation.19.6 Word JavaScript APIJavaScript API for building Word add-ins and interacting with Word document content.19.6 VitePress Runtime APIThe VitePress Runtime API provides Vue composition functions and helper utilities for use in custom themes,...19.0 Swagger ParserSwagger Parser (swagger-parser) is a JavaScript library for parsing, validating, and dereferencing OpenAPI ...18.2 Arc BoostsUser-authored CSS and JavaScript overlays that customize the look and behavior of any website inside Arc. A...18.0 Balancer SOR SDKClient-side TypeScript / Solidity SDK for the Balancer Smart Order Router; constructs swap routes against c...17.4 Handlebars.jsHandlebars provides the power necessary to let you build semantic templates effectively with no frustration...17.0 Hapihapi is a rich, configuration-centric framework for building web applications and APIs in Node.js. It provi...17.0 YeomanYeoman is a scaffolding tool for modern webapps and APIs. Generators provide templates for REST APIs, Expre...17.0 SenecaSeneca is a microservices toolkit for Node.js that uses a pattern-matching approach to message handling. It...16.0 AngularJS Core APIThe AngularJS (Angular.js, version 1.x) core framework API for building dynamic single-page web application...15.9 Spline Code API for WebClient SDK for embedding and interacting with Spline scenes from JavaScript.15.8 AxiosAxios is a promise-based HTTP client for the browser and Node.js with automatic JSON data transformation an...15.4 Crawlee JavaScript SDKThe Crawlee JavaScript SDK is a Node.js/TypeScript library for building reliable web scrapers and crawlers....15.4 CucumberCucumber is the world's most popular BDD framework, supporting Java, JavaScript, Ruby, Python, and C#. It u...15.4 Lightning Web Components Runtime APICore JavaScript APIs for building Lightning Web Components including decorators, wire service, and componen...15.1 connect-es (Connect for ECMAScript)Connect for ECMAScript provides type-safe browser and Node.js clients and Node.js servers from Protobuf sch...14.3 easyJet Brand Widget Service (easyDom)easyJet's hosted client-side widget platform for partner and white-label sites. Each widget is a script tag...14.2 Qlik Nebula.jsModern framework for building visualization mashups with Qlik's next-generation APIs.14.2 Qlik Sense Capability APIsJavaScript APIs for building mashups and custom visualizations in Qlik Sense.14.2 Node.jsNode.js is a JavaScript runtime built on Chrome's V8 engine that powers server-side applications and toolin...13.7 Comcast Firebolt SDKFirebolt is Comcast's application platform for building apps that run on TVs, set-top boxes, and other conn...12.6

Minimal 3 Almost no public developer surface

jQuery CDNContent Delivery Network endpoints for serving jQuery and related plugin library files (jQuery, jQuery UI, ...10.8 jQuery Core APIThe core jQuery API for DOM manipulation, event handling, AJAX, effects, animation, and other JavaScript ut...10.8 Mirage JSMirage JS is a JavaScript library for mocking APIs. It enables frontend developers to build complete featur...10.8

Score breakdown

Frequency

66.5

log-scaled weighted occurrences

Breadth

6.5

spread across providers

Quality lift

42.3

mean composite of providers using it

Cohesion

28.3

strength of nearest seed neighbor

Where this tag comes from

Api tag235

Provider tag65

Cohort brief

Auto-generated

The 237 providers in the APIs.io catalog tagged JavaScript, scored on the Kin Score. Every figure below is computed from the catalog — nothing here is written.

Providers

237

all scored

Mean Kin Score

35.1

+14.4 vs catalog 20.7

Mean Agent Readiness

17.1

+7.4 vs catalog 9.7

Spread

5–83.3

median 34.3 · σ 14.8

How the 237 split by band

Exemplar 9Strong 14Developing 65Thin 77Emerging 64Minimal 8

Facet averages, against the whole catalog

Facet	This cohort	Catalog	Difference	Scored
Contract Quality	38.3	17.5	+20.8	237
Operational Transparency	28.4	11.3	+17.1	237
Developer Ergonomics	32.3	17.9	+14.4	237
Access Clarity	35.1	22.3	+12.8	237
Discoverability	68.3	60.4	+7.9	237
Contract Governance	12.1	6.4	+5.7	237

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

Artifact	This cohort	Catalog	Difference
MCP server (any)	14%	16%	-2
MCP server (first-party)	8%	7%	+1
Agent Skills	0%	0%	0
OAuth scopes	12%	9%	+3
Security	97%	88%	+9
Arazzo workflows	6%	2%	+4
Governance rules	50%	13%	+37

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 Salesforce 83.3
2 RudderStack 80.2
3 Didomi 77.1
4 Iterable 73.9
5 Google Ads 70.5
6 New Relic 68.8
7 Matomo 67.3
8 Oracle Siebel 67.1
9 Koala 67
10 Playable 64.3

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/javascript"

All tags

curl "https://apis.io/api/v1/tags?limit=25"

As a scored cohort

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

The distribution (Pro)

curl "https://apis.io/api/v1/cohorts/tag/javascript/stats" \
  -H "X-API-Key: $APIS_IO_KEY"

Discovery needs no key. Ratings and market analysis are Pro.

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

JavaScript

Providers using this tag (237)

APIs with this tag (233)