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

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• Updated Nov 5, 2026
• TypeScript

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

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• Updated Nov 12, 2026
• JavaScript

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

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• Updated Dec 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.

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• Updated Nov 11, 2026
• Python

Open-source platform for creating safe, isolated production sandboxes for API, integration, and E2E testing.

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• Updated Nov 12, 2026
• Go

Hurl, run and test HTTP requests with plain text.

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• Updated Nov 11, 2026
• Rust

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。

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• Updated Nov 9, 2026
• 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

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• Updated May 21, 2024
• Python

Test Automation Made Simple

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• Updated Nov 11, 2026
• Java

Friendly and fast tool for sending HTTP requests

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• Updated Nov 6, 2026
• Rust

Newman is a command-line collection runner for Postman

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• Updated Oct 9, 2026
• JavaScript

Community hub for Requestly API Client — bugs, feature requests, and roadmap. The privacy-first Postman alternative.

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• Updated Nov 12, 2026

HTTP parameter discovery suite.

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• Updated Feb 20, 2025
• Python

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

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• Updated Nov 1, 2026
• TypeScript

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

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• Updated Nov 12, 2026
• TypeScript

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

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• Updated Mar 19, 2025

Catch API bugs before your users do

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• Updated Nov 12, 2026
• Python

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.

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• Updated Oct 24, 2026
• Dart

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

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• Updated Nov 10, 2026
• TypeScript

☔ 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.

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• Updated Nov 8, 2026
• JavaScript