Alternatives

Products that do what Quadrastack does

All-in-one CLI for mocking and testing APIs

1. 1
   Sparrow▲331

   The Open Source API Testing Tool For All Developers

   2024

2. 2
   Refraction▲156

   Generate unit tests, create docs and refactor code using AI.

   2023

3. 3
   Clobbr▲443

   Easy API endpoint load testing without breaking the bank

   2023

4. 4
   Swagger Inspector▲141

   Free online tool to test APIs and autogenerate documentation

   2018

5. 5WB
   We built a tool that automatically generates API tests▲108

   Hi, this is Mish and Sebastian. We are working on Step CI - a fully automated API testing platform for developers. Step CI works programming-language independent and for different API paradigms (REST, GraphQL, XML). Our CLI and test runner are available on GitHub (https://github.com/stepci) under the MPLv2 license. Since our last launch, Step CI is now able to generate automated tests for your API based on your OpenAPI (Swagger) spec. This saves you a lot of time as you never have to write and maintain your tests again! We would like to invite you to try our tool and give us…

   2022 · stepci.com

6. 6
   Octrafic▲130

   Test your APIs in plain English, straight from the terminal

   Mar 2026

7. 7
   ezyMock▲81

   Mocking API endpoints has never been easier

   2017

8. 8
   APIEval-20▲121

   An open benchmark for AI agents that test APIs

   May 2026 · resources.kusho.ai

9. 9IO
   I open sourced the CLI of my API Testing Framework▲16

   2023 · github.com

10. 10TA
    The all-in-one fake API▲12

    2024 · fooapi.com

11. 11
    TestMagic▲53

    AI-powered API test automation. Save 90% of testing time

    2025

12. 12NW
    New way to test APIs with OpenAPI and Postman▲80

    2021 · github.com

13. 13ML
    Multiple – Load test any API with JavaScript and NPM packages▲38

    Hey HN, I wanted a better load testing solution – so I built one with my team at Multiple. We just opened early access and would love to get your feedback. We created Multiple to solve three challenges with existing tools: 1. Limited scripting capabilities. XML or GUI-based scripting can only test basic scenarios. Existing code-based tools struggle with auth, generating synthetic data, and testing anything other than HTTP requests. We went with JavaScript for ease of use, versatility, and integration with existing developer workflows. 2. Cannot use existing libraries or code. Instead of…

    2023 · app.multiple.dev

14. 14CF
    CLI for trying out Node.js modules easier▲58

    2016 · github.com

15. 15AC
    A CLI to kick-start any language▲28

    I'm working on a CLI that helps you create the boilerplate of your project in multiple languages and frameworks. In case of front-end frameworks/libraries, with cli you'll be able to create the project, set up git on your local, add the UI-framework, testing framework, and linting, and in the future releases you'll be able to even add pre-designed components. The CLI currently supports React, Angular, Vue, Svelte and Node.js will be released today. Also soon, you'll be able to deploy your applications to AWS with a single command. Appreciate your feedbacks and all the contributions are…

    2022

16. 16
    apimock-rs▲9

    A developer-friendly, fast and functional HTTP(S) server.

    Nov 2025 · apimokka.github.io

17. 17ST
    Simple tool to generate mock APIs for testing▲25

    2024 · endpts.io

18. 18RB
    Rust built open-sourced CLI tool for API specification validation▲23

    2022 · github.com

19. 19
    Mocknica - AI-Powered Mock API Server▲8

    Create mock APIs in seconds with AI. Ship prototypes faster.

    Dec 2025 · mocknica.dev

20. 20
    VaporMock▲8

    Describe your API. Get a live URL. Instantly.

    Feb 2026 · vapormock.cloud

21. 21
    Mock Studio▲3

    A simple yet powerful AI Powered HTTP API mocking tool

    Feb 2026 · mockstudio.app

22. 22AS
    A simple CLI tool to try python packages▲6

    2016 · github.com

23. 23
    Ntropi▲7

    The resilient API mocking tool for Frontend developers

    Feb 2026 · ntropi.tech

24. 24IB
    I built a tool that turns any API into a CLI for agents▲6

    TLDR; I built a tool that turns any API into a CLI designed for ai agents --- Got tired of dealing with bloated context windows from MCP servers and skills that stuff entire API docs into the agent's context CLIs fix this, agents run a single command to self-discover everything an API has to offer So, built a tool to generate them for any api. All CLIs are written in Go, fast and lightweight, no dependencies Help text (via the --help flag) is the killer feature: all context for each command/endpoint/parameter is extracted directly from the user-facing API docs and enhanced with…

    Mar 2026 · instantcli.com

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