Alternatives

Products that do what Web App for generating mocked data from an OpenAPI specification does

1. 1MO
   Mockit – Open-source app to create and configure HTTP mocked endpoints▲158

   2019 · mockit.netlify.com

2. 2NW
   New way to test APIs with OpenAPI and Postman▲80

   2021 · github.com

3. 3GA
   Generate API tests for OpenAPI endpoints▲8

   2020 · github.com

4. 4OS
   Open-source A/B testing framework▲199

   2021 · github.com

5. 5
   Mock API Generator▲548

   Generate custom data & API to build apps in less than 30s

   2021

6. 6AF
   A faster way to prototype your APIs using OpenAPI 3 and Swagger UI▲77

   2020 · github.com

7. 7GO
   Generate OpenAPI from Your Tests▲16

   2023 · github.com

8. 8AF
   A free, open-source, collaborative, mock API▲5

   2021 · mockachino.com

9. 9MM
   Mockoon – mock REST APIs in seconds▲68

   2017 · mockoon.com

10. 10OM
    OpenAPI mocks that don't suck – realistic test data, quick setup▲13

    Hi HN! I'm Ankit, the founder of Beeceptor, a request mocking and intercepting tool. This time, I built something new to address a pain I’ve personally felt (and heard from dozens of QA, frontend, and platform teams): making OpenAPI specs actually useful during development. API contracts just sit around as docs often. What if you could 'activate' them, instantly have a realistic, hosted mock server-with contract validation, smart test data, and early usage? So I made _Mockaroo for OpenAPI_, but with brains. It spins up a hosted mock server from your spec in one click. It: - Generates…

    2025 · beeceptor.com

11. 11IM
    Interceptor – mock AJAX requests at the browser level▲60

    2018 · crypt.codemancers.com

12. 12HA
    HTTPretty, an easy way to mock http requests in python▲97

    2012 · falcao.it

13. 13MM
    Mocksup, my mockup prototyping & review webapp▲95

    2010 · mocksup.com

14. 14OI
    Oag – Idiomatic OpenAPI Go client code generator▲11

    2017 · github.com

15. 15JH
    JSONator – HTTP endpoints for mock data▲7

    2014 · jsonator.herokuapp.com

16. 16TY
    Turn your OpenAPI spec into negative tests▲50

    Oct 2025 · github.com

17. 17UR
    UIGen – Runtime front end for any OpenAPI spec with AI skills▲5

    May 2026 · github.com

18. 18OS
    Open-source Swagger/OpenAPI documentation engine▲6

    2016 · github.com

19. 19DT
    Declarative Testing Framework for REST, GraphQL APIs▲45

    2018 · github.com

20. 20HW
    HTTPiper – Web tool to create mock HTTP dynamic endpoints▲5

    2021 · httpiper.com

21. 21AG
    Auto-generate load tests/synthetic test data from OpenAPI spec/HAR file▲33

    Hey HN, We just shipped a new AI-powered feature... BUT the "AI" piece is largely in the background. Instead of relying on a chatbot, we've integrated AI (with strict input & output guardrails) into a workflow to handle two specific tasks that would be difficult for traditional programming: 1. Identifying the most relevant base URL from HAR files, since it would be tedious to cover every edge case or scenario to omit analytics, tracking, and other network noise. 2. Generating synthetic data for API requests by passing the API context and faker-js functions to GPT-4. The steps are broken down…

    2024 · docs.multiple.dev

22. 22OA
    Osapy - an API proxy to visualize HTTP request for debugging▲34

    2020 · osapy.com

23. 23OS
    Open-source A/B testing platform▲11

    2021 · github.com

24. 24DD
    DuckRails – development tool for mocking API endpoints▲6

    2018 · github.com

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