Dev tools · alternatives · 2026

24 alternatives to mockr-cli

Mock a REST API with one JSON file

Below are 24 products that do a similar job, ranked by how close each is in meaning and then by launch-day votes.

1. 1
   Mock API Generator▲555

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

   2021 · retool.com · its alternatives →

2. 2
   Mockaroo▲354

   A realistic data generator to test your app

   2015 · mockaroo.com · its alternatives →

3. 3MO
   Mockit – Open-source app to create and configure HTTP mocked endpoints▲158

   2019 · mockit.netlify.com · its alternatives →

4. 4
   Mockoon – mock REST APIs in seconds▲68

   Mockoon is the easiest and quickest way to run mock REST API servers. No remote deployment, no account required, free, open source and cross-platform.

   2017 · mockoon.com · its alternatives →

5. 5
   MockAPI Dog▲122

   Instant mock REST & LLM APIs - free, no signup required

   Feb 2026 · mockapi.dog · its alternatives →

6. 6
   Pollux▲82

   Fake json data & json server mock API generator with JWT

   2021 · mohammedal-rowad.github.io · its alternatives →

7. 7MS
   Mocktastic – Simple, Offline mock REST APIs for your entire team▲43

   2018 · mocktastic.com · its alternatives →

8. 8
   HTTP Mock – Intercept, debug and mock HTTP(S) with zero setup▲341

   Beautiful, cross-platform & open-source tools for debugging, testing and building with HTTP(S), on Windows, Linux & Mac.

   2019 · httptoolkit.tech · its alternatives →

9. 9
   MockREST – Create REST APIs from Your JSON Content▲12

   Mock REST endpoints in seconds. Test without backend delays. Built for developers who need reliable mock data now.

   2017 · mockrest.com · its alternatives →

10. 10
    Mockoon▲89

    Mock servers in seconds

    2017 · mockoon.com · its alternatives →

11. 11
    Mock API Generator▲17

    API Mocks Prototyping

    2020 · mock-api-builder.vercel.app · its alternatives →

12. 12GJ
    Generate JSON mock data for testing/initial app development▲103

    Easily create complex JSON data structures using intuitive templates.

    2023 · jsongenerator.io · its alternatives →

13. 13
    Connect API Mocker▲9

    Fake REST API server with filesystem

    2017 · github.com · its alternatives →

14. 14
    Reffresh▲91

    Simple, no code, mock APIs

    2024 · reffresh.com · its alternatives →

15. 15
    Mock Maker▲93

    Effortless mock APIs for seamless testing & prototyping

    2024 · its alternatives →

16. 16
    Mockingjay – Fake servers and consumer-driven contracts▲39

    Fake server, Consumer Driven Contracts and help with testing performance from one configuration file with zero system dependencies and no coding whatsoever - quii/mockingjay-server

    2015 · github.com · its alternatives →

17. 17
    AI-Powered Mock API Generator▲86

    Generate customized, realistic mock data & APIs, via GPT

    2023 · its alternatives →

18. 18
    Mockable▲114

    For rapid API prototyping: create REST/SOAP mocks in 3 sec

    2015 · its alternatives →

19. 19
    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 · its alternatives →

20. 20
    Mockphine▲87

    Mock blocked APIs, passthrough ready routes, see live source

    Mar 2026 · mockphine.com · its alternatives →

21. 21
    MockThis▲80

    Generate mock data using AI

    2023 · its alternatives →

22. 22
    Mocka▲3

    Instant Mock APIs for Devs, No JSON Required!

    2025 · mocka.ouim.me · its alternatives →

23. 23
    Mocktail – Free, open-source mock API server with a built-in dashboard▲25

    Hi HN, I built the first version of Mocktail years ago. I recently came back to the project, and after a pretty substantial rebuild, v4 is now out. Mocktail is a free and open-source, self-hosted mock API server with a built-in dashboard and database, packaged as a single ~25 MB binary. You can run it locally or on your own infrastructure — no account or hosted service required. You can define endpoints and responses, generate realistic data per request, customize headers, status codes and latency, and inspect incoming requests in real time. With v4, I also added MCP support, so coding…

    Aug 2026 · getmocktail.com · its alternatives →

24. 24
    Fake.REST▲5

    Online JSON mock API server with dynamic response templates

    2019 · its alternatives →

Ranked by how close each launch is in meaning, then by votes. Prices were read from each product’s own site when checked and can change. Refine with your own description →