Dev tools · alternatives · 2026

24 alternatives to Connect API Mocker

Fake REST API server with filesystem

Below are 24 products that do a similar job, ranked by how close each is in meaning and then by launch-day votes. Connect API Mocker launched in 2017; newer entries below may have overtaken it.

1. 1
   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 →

2. 2
   Pollux▲82

   Fake json data & json server mock API generator with JWT

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

3. 3
   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 →

4. 4
   Mock API Generator▲555

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

   2021 · retool.com · its alternatives →

5. 5
   Fake.REST▲5

   Online JSON mock API server with dynamic response templates

   2019 · its alternatives →

6. 6MO
   Mockit – Open-source app to create and configure HTTP mocked endpoints▲158

   2019 · mockit.netlify.com · its alternatives →

7. 7FS
   Fake SMTP server as a service▲149

   2017 · develmail.com · its alternatives →

8. 8
   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 →

9. 9
   Mockaroo▲354

   A realistic data generator to test your app

   2015 · mockaroo.com · its alternatives →

10. 10
    Mockend▲6

    Effortless hosted fake REST and GraphQL API for teams/makers

    2023 · mockend.com · its alternatives →

11. 11
    apimock-rs▲9

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

    Nov 2025 · apimokka.github.io · its alternatives →

12. 12
    Decoy▲99

    Decoy lets developers create mock services locally on macOS. Test webhooks, API wrappers, scrapers and more. No Docker, no Electron, just a beautiful 10 MB native app.

    Mar 2026 · decoy-app.com · its alternatives →

13. 13
    Mocklets▲82

    A HTTP-based API simulator to assist parallel development 🛠️

    2018 · mocklets.com · its alternatives →

14. 14
    MockIPFS – a mock node and MitM proxy for IPFS testing and debugging▲29

    Powerful friendly IPFS mock node & proxy. Contribute to httptoolkit/mockipfs development by creating an account on GitHub.

    2022 · github.com · its alternatives →

15. 15
    MockAPI Dog▲122

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

    Feb 2026 · mockapi.dog · its alternatives →

16. 16
    Mockphine▲87

    Mock blocked APIs, passthrough ready routes, see live source

    Mar 2026 · mockphine.com · its alternatives →

17. 17
    Prism▲79

    Accelerate API development with realistic mock servers

    2023 · stoplight.io · its alternatives →

18. 18MS
    Mocktastic – Simple, Offline mock REST APIs for your entire team▲43

    2018 · mocktastic.com · its alternatives →

19. 19
    Mockoon▲89

    Mock servers in seconds

    2017 · mockoon.com · its alternatives →

20. 20
    MockRTC – a mock peer and MitM proxy library for WebRTC▲30

    Powerful friendly WebRTC mock peer & proxy. Contribute to httptoolkit/mockrtc development by creating an account on GitHub.

    2022 · github.com · its alternatives →

21. 21
    mockr-cli

    Mock a REST API with one JSON file

    Mar 2026 · npmjs.com · its alternatives →

22. 22
    GraphQL Zero – AIs Mocking APIs▲7

    I made an API mocking tool that imports a schema, populates fake data, then runs a local server. This is helpful for testing APIs or advanced prototyping. A demo video is here: https://www.loom.com/share/abad2cdf325e4e0b9addea1e14406166?... There’s two fun things about this tool 1. the complete lack of configs and schema annotations. i.e. you don’t need to learn faker-js. You just need your existing GraphQL schema and to to swap out the server URL in your frontend code. 2. the depth. Your fake objects have relationships to other fake objects. And in proxy mode, real…

    2023 · github.com · its alternatives →

23. 23
    Mockman▲2

    mock-server cross-platform api-mock

    2018 · github.com · its alternatives →

24. 24
    FakeURL▲6

    Free online api mocking tool | mock api generator

    2025 · fakeurl.dev · 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 →