AsyncAPI

aid: async-apis
name: AsyncAPI
description: >-
  Topic index for the AsyncAPI ecosystem — the open specification, tooling, and
  adopter community for describing event-driven and message-driven APIs. AsyncAPI
  is to asynchronous APIs what OpenAPI is to synchronous REST: a machine-readable
  contract describing channels, operations, messages, servers, and protocol
  bindings (Kafka, MQTT, AMQP, WebSocket, NATS, SNS, SQS, JMS, Pulsar, IBM MQ,
  ROS 2, and more). This repo catalogs the specification versions, the canonical
  tooling (Studio, Parser, Modelina, Generator, CLI), validators (Spectral,
  Microcks, Apicurio Registry), code-first frameworks (Springwolf, FastStream,
  nestjs-asyncapi, AsyncAPI.NET), and real-world adopters (Adeo, HDI Global,
  TransferGo, Walmart, LEGO, eBay, Salesforce).
type: Index
image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/apis-json-logo.jpg
tags:
- AsyncAPI
- Event-Driven Architecture
- Asynchronous APIs
- Message Brokers
- API Specifications
- Kafka
- MQTT
- AMQP
- WebSocket
- Linux Foundation
url: >-
  https://raw.githubusercontent.com/api-evangelist/async-apis/refs/heads/main/apis.yml
created: '2026-05-22'
modified: '2026-05-22'
specificationVersion: '0.19'

apis:
- name: AsyncAPI Specification
  description: >-
    The AsyncAPI Specification is an open-source machine-readable format for
    describing asynchronous APIs. It defines channels (the addressable
    message endpoints), operations (send/receive actions an application
    performs), messages (the payload schema), servers (the broker connection
    details), and bindings (protocol-specific details for Kafka, MQTT, AMQP,
    WebSocket, NATS, SNS, SQS, and others). Version 3.0 (December 2023)
    introduced a major restructuring separating operations from channels;
    version 3.1.0 (January 2026) added ROS 2 bindings.
  image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/apis-json-logo.jpg
  humanURL: https://www.asyncapi.com/
  baseURL: https://www.asyncapi.com/
  tags:
  - Specification
  - Event-Driven Architecture
  - Linux Foundation
  properties:
  - type: Website
    url: https://www.asyncapi.com/
  - type: Documentation
    url: https://www.asyncapi.com/docs
  - type: Specification
    url: https://www.asyncapi.com/docs/reference/specification/latest
  - type: SpecificationRepo
    url: https://github.com/asyncapi/spec
  - type: Releases
    url: https://github.com/asyncapi/spec/releases
  - type: JSONSchema
    url: https://github.com/asyncapi/spec-json-schemas
  - type: Blog
    url: https://www.asyncapi.com/blog
  - type: Newsroom
    url: https://www.asyncapi.com/community/newsroom
  - type: CaseStudies
    url: https://www.asyncapi.com/casestudies
  - type: Governance
    url: https://github.com/asyncapi/community
  - type: Slack
    url: https://www.asyncapi.com/slack-invite
  - type: GitHubOrganization
    url: https://github.com/asyncapi

  - url: graphql/async-apis-graphql.md
    type: GraphQL
- name: AsyncAPI Studio
  description: >-
    AsyncAPI Studio is the official browser-based editor for visually
    designing AsyncAPI documents and event-driven architectures. It provides
    a real-time preview rendered by the AsyncAPI React component, validation
    via the AsyncAPI Parser, and example generation for messages.
  humanURL: https://studio.asyncapi.com/
  properties:
  - type: Website
    url: https://studio.asyncapi.com/
  - type: GitHub
    url: https://github.com/asyncapi/studio
  - type: Documentation
    url: https://www.asyncapi.com/tools/studio
  tags:
  - Editor
  - Studio
  - Tooling

- name: AsyncAPI Parser
  description: >-
    The AsyncAPI Parser parses, validates, and provides a programmatic API
    over AsyncAPI documents. It is the reference implementation used by
    Studio, the CLI, and the Generator. Available in JavaScript and Go;
    a shared parser-api defines the interface.
  humanURL: https://github.com/asyncapi/parser-js
  properties:
  - type: ParserJS
    url: https://github.com/asyncapi/parser-js
  - type: ParserGo
    url: https://github.com/asyncapi/parser-go
  - type: ParserAPI
    url: https://github.com/asyncapi/parser-api
  - type: NPM
    url: https://www.npmjs.com/package/@asyncapi/parser
  tags:
  - Parser
  - Validator
  - Tooling

- name: AsyncAPI Modelina
  description: >-
    Modelina is the AsyncAPI library for generating typed payload models
    from AsyncAPI, OpenAPI, JSON Schema, and Avro documents. Supports Java,
    TypeScript, JavaScript, Go, C#, Rust, Python, Kotlin, Dart, PHP, and
    C++ output with high customization.
  humanURL: https://modelina.org/
  properties:
  - type: Website
    url: https://modelina.org/
  - type: GitHub
    url: https://github.com/asyncapi/modelina
  - type: Playground
    url: https://modelina.org/playground
  tags:
  - Code Generation
  - Modeling
  - Tooling

- name: AsyncAPI Generator
  description: >-
    The AsyncAPI Generator takes an AsyncAPI document plus a template and
    generates anything — markdown docs, HTML, Node.js code, Python code,
    Java code, AMQP/MQTT/Kafka clients. Template registry includes
    html-template, markdown-template, nodejs-template, java-template,
    python-paho-template, ts-nats-template.
  humanURL: https://github.com/asyncapi/generator
  properties:
  - type: GitHub
    url: https://github.com/asyncapi/generator
  - type: NPM
    url: https://www.npmjs.com/package/@asyncapi/generator
  - type: Templates
    url: https://github.com/asyncapi/template-for-generator-templates
  tags:
  - Code Generation
  - Documentation
  - Tooling

- name: AsyncAPI CLI
  description: >-
    The AsyncAPI CLI is the unified command-line interface for the AsyncAPI
    ecosystem. Commands include `validate`, `generate`, `optimize`, `convert`
    (2.x to 3.x), `new` (scaffold a spec), `bundle`, and `start studio`.
  humanURL: https://github.com/asyncapi/cli
  properties:
  - type: GitHub
    url: https://github.com/asyncapi/cli
  - type: NPM
    url: https://www.npmjs.com/package/@asyncapi/cli
  - type: Documentation
    url: https://www.asyncapi.com/tools/cli
  tags:
  - CLI
  - Tooling

- name: AsyncAPI React Component
  description: >-
    The AsyncAPI React component renders interactive HTML documentation from
    an AsyncAPI document. Used by Studio, html-template, and the
    asyncapi-react Storybook playground. Also available as a Web Component.
  humanURL: https://github.com/asyncapi/asyncapi-react
  properties:
  - type: GitHub
    url: https://github.com/asyncapi/asyncapi-react
  - type: NPM
    url: https://www.npmjs.com/package/@asyncapi/react-component
  tags:
  - Documentation
  - React
  - Tooling

- name: Microcks
  description: >-
    Microcks is a Kubernetes-native open-source platform for API mocking
    and contract testing. First-class support for AsyncAPI — it consumes
    AsyncAPI documents and stands up mock Kafka, MQTT, AMQP, WebSocket,
    NATS, SNS, SQS, Google PubSub, and IBM MQ endpoints replaying example
    messages from the contract.
  humanURL: https://microcks.io/
  properties:
  - type: Website
    url: https://microcks.io/
  - type: GitHub
    url: https://github.com/microcks/microcks
  - type: Documentation
    url: https://microcks.io/documentation/
  - type: AsyncAPISupport
    url: https://microcks.io/documentation/explanations/asyncapi-support/
  - type: CNCFSandbox
    url: https://www.cncf.io/projects/microcks/
  tags:
  - Mocking
  - Contract Testing
  - CNCF
  - Tooling

- name: Apicurio Registry
  description: >-
    Apicurio Registry is an open-source schema and API registry from Red Hat
    that stores AsyncAPI, OpenAPI, JSON Schema, Avro, Protobuf, GraphQL, and
    XML Schema artifacts. Integrates with Kafka, Kafka Connect, and Kafka
    Streams via SerDes libraries, and enforces compatibility rules on
    schema evolution.
  humanURL: https://www.apicur.io/registry/
  properties:
  - type: Website
    url: https://www.apicur.io/registry/
  - type: GitHub
    url: https://github.com/Apicurio/apicurio-registry
  - type: Documentation
    url: https://www.apicur.io/registry/docs/
  tags:
  - Schema Registry
  - Registry
  - Tooling

- name: Springwolf
  description: >-
    Springwolf is the code-first AsyncAPI generator for Spring Boot
    applications. It auto-detects @KafkaListener, @RabbitListener,
    @JmsListener, @SqsListener, @SnsListener, and Cloud Stream bindings
    and produces an AsyncAPI document plus an interactive UI at runtime.
  humanURL: https://www.springwolf.dev/
  properties:
  - type: Website
    url: https://www.springwolf.dev/
  - type: GitHub
    url: https://github.com/springwolf/springwolf-core
  tags:
  - Code-First
  - Spring Boot
  - Tooling

- name: FastStream
  description: >-
    FastStream is a Python framework that auto-generates AsyncAPI
    documentation from typed message handlers for Kafka, RabbitMQ, NATS,
    Redis Pub/Sub, and Confluent Kafka. Created by airtai and donated to
    the AsyncAPI community.
  humanURL: https://faststream.airt.ai/
  properties:
  - type: Website
    url: https://faststream.airt.ai/
  - type: GitHub
    url: https://github.com/airtai/faststream
  tags:
  - Code-First
  - Python
  - Tooling

- name: Glee
  description: >-
    Glee is the AsyncAPI-native application framework. It takes an
    AsyncAPI document as input and scaffolds a working server (Node.js)
    that handles the channels, validates messages against the schema, and
    routes them to user-supplied handler functions.
  humanURL: https://github.com/asyncapi/glee
  properties:
  - type: GitHub
    url: https://github.com/asyncapi/glee
  tags:
  - Framework
  - Application Server
  - Tooling

common:

- type: TopicIndex
  url: https://github.com/api-evangelist/async-apis

- type: JSONSchema
  url: json-schema/asyncapi-document-schema.json
- type: JSONSchema
  url: json-schema/asyncapi-channel-schema.json
- type: JSONSchema
  url: json-schema/asyncapi-operation-schema.json
- type: JSONSchema
  url: json-schema/asyncapi-message-schema.json
- type: JSONSchema
  url: json-schema/asyncapi-server-schema.json

- type: JSONLD
  url: json-ld/async-apis-context.jsonld

- type: Vocabulary
  url: vocabulary/async-apis-vocabulary.yml

- type: Examples
  url: examples/asyncapi-kafka-example.yml
- type: Examples
  url: examples/asyncapi-mqtt-example.yml
- type: Examples
  url: examples/asyncapi-websocket-example.yml

- type: Specification
  url: https://www.asyncapi.com/docs/reference/specification/latest
- type: SpecificationRepo
  url: https://github.com/asyncapi/spec
- type: GitHubOrganization
  url: https://github.com/asyncapi
- type: Governance
  url: https://github.com/asyncapi/community
- type: LinuxFoundationProject
  url: https://www.linuxfoundation.org/projects

maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com