alinGmail/LiveMock

Mockoon is the easiest and quickest way to run mock APIs locally. No remote deployment, no account required, open source.

mocker-api that creates mocks for REST APIs. It will be helpful when you try to test your application without the actual REST API server.

Insomnia Mockbin is the underlying backend for the API mocks capability of Insomnia. It is built and used by Kong, the author of the open-source Kong Gateway.

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.

Smocker is a simple and efficient HTTP mock server and proxy

A tool for mocking HTTP services

Reqable issue track repo

A modern API workspace that works both online and offline — combining API documentation, testing, mock, and AI-powered automation in one lightweight tool

The open source, cloud native tool for API Mocking and Testing. Microcks is a Cloud Native Computing Foundation incubating project 🚀