generator VS spec

Compare generator vs spec and see what are their differences.


Use your AsyncAPI definition to generate literally anything. Markdown documentation, Node.js code, HTML documentation, anything! (by asyncapi)


The AsyncAPI specification allows you to create machine-readable definitions of your asynchronous APIs. (by asyncapi)
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generator spec
4 30
565 2,733
5.0% 5.4%
9.1 7.5
4 days ago 6 days ago
JavaScript JavaScript
Apache License 2.0 Apache License 2.0
The number of mentions indicates the total number of mentions that we've tracked plus the number of user suggested alternatives.
Stars - the number of stars that a project has on GitHub. Growth - month over month growth in stars.
Activity is a relative number indicating how actively a project is being developed. Recent commits have higher weight than older ones.
For example, an activity of 9.0 indicates that a project is amongst the top 10% of the most actively developed projects that we are tracking.


Posts with mentions or reviews of generator. We have used some of these posts to build our list of alternatives and similar projects. The last one was on 2022-02-16.
  • What is AsyncAPI?
    5 projects | | 16 Feb 2022
    AsyncAPI Generator
  • An introduction to the AsyncAPI specification
    4 projects | | 31 Jan 2022
    With the file created, we can now generate more friendly documentation. For this, we need to install generator or use it in its Docker version.
  • Getting Started with CloudEvents and AsyncAPI
    8 projects | | 16 Sep 2021
    This can be improved and extended overtime, especially because of the way the generator is designed, enabling extensibility so we can have templates for many other languages that support more protocols, etc. For example, there is only a NATS generator for .NET Core... but perhaps in the future there could be more protocols supported for .NET Core and examples built for Azure 😃.
  • How to contribute to OSS AsyncAPI Initiative 🌈
    7 projects | | 9 Sep 2021
    Continue improvements and add new features to core tools such as our spec parser/validator and code generator.


Posts with mentions or reviews of spec. We have used some of these posts to build our list of alternatives and similar projects. The last one was on 2023-01-20.
  • Are there any languages with transactions as a first-class concept?
    4 projects | | 20 Jan 2023 and seem like two efforts to move in this direction a bit for web APIs.
  • IoT Core will be discontinued on Aug. 16, 2023
    3 projects | | 15 Aug 2022
    I'm in the process of migrating's remote command/event system off Cloud IoT Core. I've been running on IoT Core for 1.5 years. Here's my breakdown of the costs...

    - $236.99 in usage, approx 1% of project's total revenue

    - ~20 hours to implement pub/sub applications running on a mix of Raspberry Pi & GCP VMs. Implementations were in Rust and Python. It would have taken much, much longer to stand up a managed MQTT broker and identity/key management that I felt comfortable using in my own home, let alone providing to customers.

    - Hundreds of hours implementing and debugging glue between GCP's Pub/Sub product, websocket-based subscribers, and MQTT subscribers/publishers.

    I don't regret my decision (wouldn't have shipped otherwise), but I'm looking forward to the next phase. Here's what I'm migrating towards:

    - NATs message broker. NATS supports connections via MQTT and Websocket protocols, besides NATS own protocol.

    - django-nats-nkeys for org, identity, and JWT management (not production-ready, don't use this until I've been eating my own dog food for a few months) [1]

    - AsyncAPI schemas [2] for core message APIs, including schemas for 3rd-party printer software events (OctoPrint, Moonraker, Repetier, etc). This will underpin PrintNanny's plugin system.



  • Contract Integration Testing
    2 projects | | 24 Jul 2022
    A contract is nothing but a regular piece of code. So, you cannot apply the contract written in Java in the microservices created with Golang. If you need to use varying technologies and languages for the different parts of your system, then implementing statically typed contracts might become a challenge. There are some solutions on the market. For example, OpenAPI and AsyncAPI specifications can generate code snippets based on the provided configurations. Anyway, the approaches have limitations.
  • Is there a standard for microservice specifications (for metadata)
    2 projects | | 26 May 2022
    There is also great stuff going on around AsyncAPI
  • I made a documentation driven web-socket framework
    5 projects | | 19 May 2022
    The framework is driven by the AsyncAPI specification, built on top of Flask-SocketIO. and inspired by Connexion.
  • Hack to the Future: A Recap
    5 projects | | 6 May 2022
    Gabriel Gore, Sachin Muralidhara, and Sean McGovern taught us a little more about AsyncAPI , an open-source specification for event-driven architectures (EDA). It defines interfaces for Async APIs, similar to what OpenAPI or Swagger does for RESTful services. You can automate and formalize docs, you can generate code, you can validate schemas for event-driven microservices, and it's compatible with OpenAPI for a lot of use cases. (If you have an existing code base with Open API schemas in it, you may be able to port those over to AsyncAPI; here’s a nifty comparison chart.)
  • How to use Protobuf with Go?
    6 projects | | 6 Apr 2022
    Protobuf is one of the ways to implement Messaging Contracts there are more options like Pact, AsyncApi
  • What is AsyncAPI?
    5 projects | | 16 Feb 2022
    Gitter-streaming API
    5 projects | | 16 Feb 2022
    Here comes AsyncAPI: built with OpenAPI’s legacy in mind and sharing some concepts with, it uses some parts of its original structure and optimizes them for asynchronous needs.
  • Top 3 harmful incidents in open-source in 2021
    4 projects | | 6 Feb 2022
    I'm building community at AsyncAPI and definitely prefer to learn from the mistakes of others

What are some alternatives?

When comparing generator and spec you can also consider the following projects:

springdoc-openapi - Library for OpenAPI 3 with spring-boot

mqtt-venstar-bridge - Simple MQTT bridge to the venstar HTTP API

openapi-generator - OpenAPI Generator allows generation of API client libraries (SDK generation), server stubs, documentation and configuration automatically given an OpenAPI Spec (v2, v3)

asyncapi-to-postman - Creates a Postman collection from an AsyncAPI file.

asyncapi-react - React component for rendering documentation from your specification in real-time in the browser. It also provides a WebComponent and bundle for Angular and Vue

team - Rust teams structure

Flask-SocketIO - Socket.IO integration for Flask applications.

eventbridge-atlas - Open-source tool to document, discover, and share your Amazon EventBridge schemas.

nodejs-ws-template - Node.js WebSockets template for the AsyncAPI Generator

WatermelonDB - 🍉 Reactive & asynchronous database for powerful React and React Native apps ⚡️

parser-js - AsyncAPI parser for Javascript (browser-compatible too).

JSON-Schema Faker - JSON-Schema + fake data generators