apiuikit

React component library for rendering API specifications. Point it at an AsyncAPI or OpenAPI document and get a full interactive UI, which includes: servers, channels/endpoints, operations, messages, schemas, with no manual mapping required.

▶ Try it out in the Playground

Spec compatibility: apiuikit renders AsyncAPI 3.x and OpenAPI 3.0/3.1 documents. Version compatibility does not imply that every specification keyword has a dedicated UI; see OpenAPI coverage for the exact rendered features and deliberate limits.

Install

npm install apiuikit

If you want to hand it a raw YAML/JSON string instead of a pre-parsed object, also install the peer dependency for whichever spec you're rendering:

npm install @asyncapi/parser      # for AsyncAPI documents
npm install @scalar/openapi-parser # for OpenAPI documents

Usage in React

The quickest path to use the kit for AsyncAPI is to pass a pre-resolved AsyncAPI document object (e.g. imported from a JSON file, or fetched from your own backend):

import { AsyncAPI } from "apiuikit";
import "apiuikit/style.css";
import doc from "./asyncapi.json";

export default function App() {
  return <AsyncAPI asyncapi={doc} />;
}

If you have a raw YAML/JSON string instead (e.g. entered by a user, or loaded from a file at runtime), use AsyncAPIRenderer, which parses and validates it for you:

import { AsyncAPIRenderer } from "apiuikit";
import "apiuikit/style.css";

export default function App() {
  return <AsyncAPIRenderer raw={rawYamlOrJsonString} />;
}

Avro and Protobuf message payloads are supported out of the box in both entry points, no extra install required.

The same two entry points exist for OpenAPI, as OpenAPI / OpenAPIRenderer:

import { OpenAPI } from "apiuikit";
import "apiuikit/style.css";
import doc from "./openapi.json";

export default function App() {
  return <OpenAPI openapi={doc} />;
}

Rendering sections individually

Prefer your own layout over the full widget? Render one section on its own by passing it a document:

import { AsyncAPIOperations } from "apiuikit";
import doc from "./asyncapi.json";

export default function OperationsPage() {
  return <AsyncAPIOperations document={doc} />;
}

AsyncAPIServers, AsyncAPIOperations, AsyncAPIMessages, and AsyncAPIInfo all work this way (OpenAPI equivalents: OpenAPIServers, OpenAPIEndpoints, OpenAPIInfo), as does Schemas, which is shared by both specs. To arrange several of them together, wrap them in AsyncAPIProvider (or OpenAPIProvider) instead so the document is resolved once and shared:

import { AsyncAPIProvider, AsyncAPIServers, AsyncAPIOperations, Schemas } from "apiuikit";

export default function CustomLayout() {
  return (
    <AsyncAPIProvider document={doc}>
      <AsyncAPIServers />
      <AsyncAPIOperations />
      <Schemas />
    </AsyncAPIProvider>
  );
}

See the full usage docs for props, configuration options, and more:

• Without Parser (AsyncAPI component)
• With Parser (AsyncAPIRenderer component, parseAndRender utility)
• Composable Sections (AsyncAPIServers, AsyncAPIOperations, AsyncAPIMessages, Schemas, AsyncAPIInfo, AsyncAPIProvider)
• Configuration (ConfigInterface: theme, show flags, sidebar, sidePanel, etc.)
• Web Components (<apiuikit-asyncapi>, <apiuikit-asyncapi-renderer>, use apiuikit from any framework)
• Plugins (plugins prop, definePlugin, writing and publishing your own)
• Markdown export (making your docs AI-readable: config.markdown.url, documentToMarkdown, documentToLlmsTxt)
• Avro schemas
• Protobuf schemas
• OpenAPI (OpenAPI, OpenAPIRenderer, composable sections, web components)

Usage with Web Components

For Vue, Angular, Svelte, plain HTML, or any other environment that supports custom elements, use the framework-agnostic web-component package. React and the document parsers are bundled, so consumers do not need to install them separately.

npm install @apiuikit/web-component

Load the custom elements and stylesheet once, then pass a raw AsyncAPI or OpenAPI document to the corresponding renderer:

<apiuikit-asyncapi-renderer id="api-doc"></apiuikit-asyncapi-renderer>

import "@apiuikit/web-component";
import "@apiuikit/web-component/style.css";

const apiDoc = document.querySelector("#api-doc");
apiDoc.spec = rawYamlOrJsonString;

Use <apiuikit-openapi-renderer> for raw OpenAPI documents. If the document is already parsed, use <apiuikit-asyncapi> or <apiuikit-openapi> and assign the object to its spec property.

See Web Components for CDN usage, configuration, diagnostics, and framework integration.

Plugins

Extend a rendered document with UI from a separately-installed package, without that code living in apiuikit's own bundle — e.g. a "Try it" tab on OpenAPI operations for sending real requests:

import { OpenAPI } from "apiuikit";
import myPlugin from "@yourscope/apiuikit-plugin-whatever";

<OpenAPI openapi={doc} plugins={[myPlugin]} />

See Plugins for the full reference, including how to write and publish your own.

Contributing

This is a monorepo. To work on the library itself (setup, playground, Storybook, tests, PRs, releases), see CONTRIBUTING.md.