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AsyncAPI Generator
What it is
AsyncAPI Generator uses an AsyncAPI document and a template to create documentation, code, diagrams, microservices, applications, and other defined outputs. It can produce HTML and Markdown documentation, as well as code for languages including Node.js, Java, and Python. Its listed language support also includes JavaScript, TypeScript, Go, C#, and PHP. For API clients, it can generate libraries that abstract protocol and networking logic for Kafka, WebSocket, MQTT, and other protocols. For providers, it can scaffold server configuration, project structure, connection logic, and stub handler files. Users can create templates or extend existing ones to alter the output. The free, open-source project is available for Linux and self-hosted use, with npm and Docker listed as installation options. The Node.js library requires Node.js v18.12.0 or higher and npm v8.19.0 or higher. The CLI can be installed in CI/CD pipelines, with a GitHub Actions option. Baked-in templates are experimental, limited in number, and not recommended for production use.
For and against
For
- Generates documentation, code, diagrams, and other outputs.
- Supports custom and extended templates.
- Can scaffold API provider projects.
- Offers npm and Docker installation options.
- Free open-source project under Apache License 2.0.
Against
- Built-in templates are experimental and limited.
- Built-in templates are not recommended for production use.
- Requires Node.js v18.12.0 or higher and npm v8.19.0 or higher.
The verdict
AsyncAPI Generator covers a broad range of outputs from AsyncAPI documents and templates, with options to customize templates and integrate the CLI into CI/CD. Its baked-in templates have stated production limitations, so teams may need to create or extend templates for their needs.
Who it suits
It suits backend API developers and teams building or maintaining event-driven architectures, including Kafka-based microservices. Teams that need tailored outputs can create or extend templates, but should account for the limits on built-in templates.
Plans and prices
AsyncAPI Generator
Apache License 2.0 open-source project
Read 9 Oct 2026 · asyncapi.com
On the record
- API client libraries
- The Generator can produce client libraries that abstract protocol and networking logic for APIs using Kafka, WebSocket, MQTT, and other protocols.asyncapi.com · read 9 Oct 2026
- CI/CD integration
- The docs say the AsyncAPI CLI can be installed in a CI/CD pipeline and point to a GitHub Actions option for the Generator.asyncapi.com · read 9 Oct 2026
- Code generation
- It can generate code in languages including Node.js, Java, and Python.asyncapi.com · read 9 Oct 2026
- Documentation output
- It can generate HTML and Markdown documentation from AsyncAPI files.asyncapi.com · read 9 Oct 2026
- Extensibility
- Users can create custom templates or extend existing templates to change the output.asyncapi.com · read 9 Oct 2026
- Install methods
- The product page lists npm and Docker as installation options.asyncapi.com · read 9 Oct 2026
- Intended users
- The project describes AsyncAPI users as people who implement and maintain event-driven architectures, including backend API developers and teams maintaining Kafka-based microservice communication.asyncapi.com · read 9 Oct 2026
- Library use
- The Generator library can be installed in Node.js projects with npm install @asyncapi/generator.asyncapi.com · read 9 Oct 2026
- License and governance
- The AsyncAPI Initiative describes its tools as free open-source software under the Linux Foundation and says projects under the Initiative use the Apache 2.0 license.asyncapi.com · read 9 Oct 2026
- Provider boilerplate
- It can scaffold server configuration, project structure, connection logic, and stub handler files for API providers.asyncapi.com · read 9 Oct 2026
- Purpose
- The Generator uses an AsyncAPI document and a template to generate documentation, code, diagrams, microservices, applications, and other defined outputs.asyncapi.com · read 9 Oct 2026
- Runtime prerequisites
- The installation guide requires Node.js v18.12.0 or higher and npm v8.19.0 or higher.asyncapi.com · read 9 Oct 2026
- Support channels
- The project directs users to Slack for community contact and GitHub issues and pull requests for bugs, feature requests, and fixes.asyncapi.com · read 9 Oct 2026
- Template limitation
- The docs say baked-in templates are experimental, limited in number, and not recommended for production use.asyncapi.com · read 9 Oct 2026
