Open-Source API Development Ecosystem •https://hoppscotch.io • Offline, On-Prem & Cloud • Web, Desktop & CLI • Open-Source Alternative to Postman, Insomnia

• UpdatedDec 16, 2025
• TypeScript

Opensource IDE For Exploring and Testing API's (lightweight alternative to Postman/Insomnia)

• UpdatedDec 17, 2025
• JavaScript

🥧 HTTPie CLI — modern, user-friendly command-line HTTP client for the API era. JSON support, colors, sessions, downloads, plugins & more.

• UpdatedDec 17, 2024
• Python

Mobile Security Framework (MobSF) is an automated, all-in-one mobile application (Android/iOS/Windows) pen-testing, malware analysis and security assessment framework capable of performing static and dynamic analysis.

• UpdatedDec 16, 2025
• JavaScript

Hurl, run and test HTTP requests with plain text.

• UpdatedDec 17, 2025
• Rust

API, Integration, E2E Testing Agent for Developers that actually work. Generate tests, mocks/stubs for your APIs!

• UpdatedDec 17, 2025
• Go

🔥 MeterSphere 是新一代的开源持续测试工具，内置 AI 助手，让软件测试工作更简单、更高效，不再成为持续交付的瓶颈。

• UpdatedDec 16, 2025
• Java

An interactive command-line HTTP and API testing client built on top of HTTPie featuring autocomplete, syntax highlighting, and more.https://twitter.com/httpie

• UpdatedMay 21, 2024
• Python

Test Automation Made Simple

• UpdatedDec 16, 2025
• Java

Friendly and fast tool for sending HTTP requests

• UpdatedDec 17, 2025
• Rust

Newman is a command-line collection runner for Postman

• UpdatedNov 15, 2024
• JavaScript

HTTP parameter discovery suite.

• UpdatedFeb 20, 2025
• Python

Free and open-source API Client & Interceptor.

• UpdatedDec 17, 2025
• TypeScript

A payment application to demonstrate real-world usage of Cypress testing methods, patterns, and workflows.

• UpdatedDec 8, 2025
• TypeScript

Turn any OpenAPI2/3 and Postman Collection file into an API server with mocking, transformations and validations.

• UpdatedOct 29, 2025
• TypeScript

🚀 HTTPie Desktop — cross-platform API testing client for humans. Painlessly test REST, GraphQL, and HTTP APIs.

• UpdatedMar 19, 2025

Catch API bugs before your users do

• UpdatedDec 15, 2025
• Python

Offline-First Minimalistic HTTP & Socket Testing Client for the Web & Desktop

• UpdatedSep 8, 2025
• Vue

API Dash is a beautiful AI-powered open-source cross-platform (Desktop & Mobile) API Client built using Flutter which can help you easily create & customize your HTTP & GraphQL API requests, visually inspect responses and generate API integration code. A lightweight alternative to postman/insomnia.

• UpdatedDec 14, 2025
• Dart

☔ 敏捷开发最强大易用的接口工具，机器学习零代码测试与 AI 问答、生成代码与静态检查、生成文档与光标悬浮注释，腾讯、华为、SHEIN、传音、工行等使用 ☔ The most advanced tool for HTTP API. Machine learning no-code testing and AI assistant, generating codes and static analysis, generating comments and floating hints. Used by Tencent, Huawei, SHEIN, TRANSSION, ICBC, etc.

• UpdatedDec 16, 2025
• JavaScript