Free and open-source API Client & Interceptor.

• UpdatedFeb 20, 2026
• TypeScript

Lightweight service virtualization/ API simulation / API mocking tool for developers and testers

• UpdatedFeb 14, 2026
• Go

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.

• UpdatedFeb 10, 2026
• JavaScript

Scriptable, multipurpose mock server. Run standalone mock servers, or embed mocks within your tests or CI/CD pipeline.

• UpdatedFeb 14, 2026
• Shell

🐵 HTTP mock server, useful to stub services and simulate dynamic API responses, leveraging ASP.NET Core features, built-in fake data generation and pure C# scripting

• UpdatedNov 26, 2025
• C#

NEI 接口管理平台 源代码

• UpdatedMar 1, 2022
• JavaScript

Manage and start the mock servers on your local platform easily

• UpdatedDec 8, 2022
• Vue

Connect middleware that creates mocks for REST APIs

• UpdatedJun 20, 2024
• JavaScript

The open-source, cross-platform API test and design tool.

• UpdatedJan 18, 2024
• Vue

Mockbin by Zuplo. Mock, Test, and View HTTP Requests and Responses

• UpdatedFeb 20, 2026
• TypeScript

This Angular library contains several projects: forms, api-mock, contenteditable.

• UpdatedApr 14, 2023
• TypeScript

Simple and efficient HTTP and Webscoket mock server with specification in yaml, edn or OpenAPI

• UpdatedDec 22, 2025
• Clojure

Dynamic API, S3 & Mail mocking for web, mobile & microservice development.

• UpdatedFeb 2, 2026
• Java

Intercept & mock http requests issued by XMLHttpRequest, fetch, nodejs https/http module, axios, jquery, superagent, ky, node-fetch, request, got or any other request libraries by intercepting XMLHttpRequest, fetch and nodejs native requests at low level.

• UpdatedOct 16, 2025
• JavaScript

Library to mock local data requests using Fetch or XHR

• UpdatedJan 4, 2023
• TypeScript

🔌 Simple library to manipulate HTTP requests/responses and capture network logs made by the browser using selenium tests without using any proxies

• UpdatedJul 18, 2021
• Java

Backend not ready? No problem. Helix is a zero-config AI mock server that generates realistic, dynamic data for any endpoint you hit.

• UpdatedDec 19, 2025
• Python

CLI for the Imposter mock engine, a scriptable, multipurpose mock server.

• UpdatedNov 21, 2025
• Go

Mocks network requests and allows you to make assertions about how these requests happened. Supports auto-mocking of graphQL requests given a valid schema.

• UpdatedAug 24, 2023
• TypeScript

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

• UpdatedFeb 9, 2026
• Go