Open-source platform for creating safe, isolated production sandboxes for API, integration, and E2E testing.
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Turn any OpenAPI2/3 and Postman Collection file into an API server with mocking, transformations and validations.
- oas
- prism
- mocking
- api-testing
MockServer is an HTTP(S) mock server and proxy for testing that lets you mock APIs, inspect and modify live traffic, and inject failures. It supports HTTP/1.1, HTTP/2, gRPC, WebSockets, TCP and more on a single port, with additional support for HTTP/3, message brokers, and AI/LLM APIs.
- mock-server
- proxy
- java-client
- javascript-client
🔮 Proxies nodejs require in order to allow overriding dependencies during testing.
Lightweight service virtualization/ API simulation / API mocking tool for developers and testers
- api-simulation
- golang
- proxy
- mitm
Mocks and explicit contracts in Elixir
A mocking library for Erlang
- erlang
- testing
- mocking-library
- meck
In-page HTTP controller for frontend development. Intercept, modify, and simulate API responses directly in the browser.
DeepfakeHTTP is a web server that uses HTTP dumps as a source for responses.
- http-server
- dump
- dummy
- testing
HTTP mock for Golang: record and replay HTTP/HTTPS interactions for offline testing
Simplify software testing, by easily mocking any system using HTTP/HTTPS, allowing a team to test and develop against a service that is not complete or is unstable or just to reproduce planned/edge cases.
Java binding for Hoverfly
- api-simulation
- service-virtualization
- java
- testing
TestBox is a cutting-edge testing and mocking framework for the BoxLang JVM language and ColdFusion (CFML), built on Behavior-Driven Development (BDD) to offer a clear and intuitive syntax for writing tests.
http proxy with Elixir. wait request with multi port and forward to each URIs
- elixir
- http-proxy
Symfony bundle which is used to create fake API Sandbox response with annotations
- php
- php7
- symfony
- symfony2
localaik is a local compatibility server for a subset of the Gemini and OpenAI APIs. Run one container locally, point your SDK to it, and the proxy serves both protocol shapes on the same port for tests and development.
Mocker + Proxy Application
- golang
- go
- docker
- heroku
The simplest way to test your APIs and webhooks
- dockerfile
- qa-automation
- testing-tools
- self-hosted