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

Build a fake backend by providing the content of JSON files or JavaScript objects through configurable routes.

Mockoon's official CLI. Deploy your mock APIs anywhere.

gRPC Mock Server

Yeoman generator for building a fake backend by providing the content of JSON files or JavaScript objects through configurable routes.

The HTTP server stub you always wanted!

The tiniest http endpoints simulator

A versatile Go tool for effortlessly generating mock HTTP APIs for all your needs.

Build JSON API with authentication in just minutes.

Your lightweight, Python-native HTTP mocking server

kassette is a development server, used mainly for testing, which proxies requests and is able to easily manage local mocks.

Mockoon's commons library. Used in Mockoon desktop application and CLI.

GitHub Action for Mockoon CLI

This library allows to mock HTTP responses for integration, component and acceptance tests of your projects written in C# / .NET by hosting a webserver returning configured responses.

Prototyping Android Apps Without Server API's

Intelligent Model Context Protocol (MCP) server for AI-assisted API development. Generate mock servers from OpenAPI specs with advanced logging, performance analytics, and server discovery. Optimized for AI development workflows with comprehensive testing insights and automated analysis.

Mockoon's commons library. Used in Mockoon desktop application and CLI.

HTTP stub server from plain files

[:construction_worker: :hammer: :wrench: WIP!!] Highly configurable mocking server. Speeds your Front End development workflow! :rocket:

Postern a tool for mocking API's locally for frontend development and testing