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AsyncAPI (async-apis)

About this repository

This is not our API. This repository is an independent, third-party profile of a company's publicly available API surface, maintained by API Evangelist. API Evangelist does not operate, host, resell, or support this company's APIs, and is not affiliated with or endorsed by the company unless stated on the profile.

Where the information came from. Everything here is assembled from material a member of the public can reach with a browser and no credentials — the company's own website, developer portal and documentation, the specifications it publishes for public use (OpenAPI, AsyncAPI, JSON Schema, apis.json, llms.txt and similar), its public repositories, and its public status, pricing and changelog pages. Nothing here is obtained by breaching a system, defeating an access control, or using credentials of any kind.

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Full detail: Where this data comes from

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).

APIs.json: https://raw.githubusercontent.com/api-evangelist/async-apis/refs/heads/main/apis.yml

Scope

  • Type: Index

Tags

  • AsyncAPI
  • Event-Driven Architecture
  • Asynchronous APIs
  • Message Brokers
  • API Specifications
  • Kafka
  • MQTT
  • AMQP
  • WebSocket
  • Linux Foundation

Timestamps

  • Created: 2026-05-22
  • Modified: 2026-05-22

APIs

AsyncAPI Specification

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.

Tags

  • Specification
  • Event-Driven Architecture
  • Linux Foundation

Properties

AsyncAPI Studio

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.

Tags

  • Editor
  • Studio
  • Tooling

Properties

AsyncAPI Parser

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.

Tags

  • Parser
  • Validator
  • Tooling

Properties

AsyncAPI Modelina

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.

Tags

  • Code Generation
  • Modeling
  • Tooling

Properties

AsyncAPI Generator

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.

Tags

  • Code Generation
  • Documentation
  • Tooling

Properties

AsyncAPI CLI

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.

Tags

  • CLI
  • Tooling

Properties

AsyncAPI React Component

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.

Tags

  • Documentation
  • React
  • Tooling

Properties

Microcks

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.

Tags

  • Mocking
  • Contract Testing
  • CNCF
  • Tooling

Properties

Apicurio Registry

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.

Tags

  • Schema Registry
  • Registry
  • Tooling

Properties

Springwolf

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.

Tags

  • Code-First
  • Spring Boot
  • Tooling

Properties

FastStream

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.

Tags

  • Code-First
  • Python
  • Tooling

Properties

Glee

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.

Tags

  • Framework
  • Application Server
  • Tooling

Properties

Common Properties

Maintainers

FN: Kin Lane Email: kin@apievangelist.com