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

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

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

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.

Hurl, run and test HTTP requests with plain text.

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

🔥 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。

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

Test Automation Made Simple

Friendly and fast tool for sending HTTP requests

Newman is a command-line collection runner for Postman

Free and open-source API Client & Interceptor.

HTTP parameter discovery suite.

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

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

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

Catch API bugs before your users do

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.

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

☔ 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.

:books: The starting point of your career as a Software Quality Assurance Engineer | Quality Automation Engineer :books:

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.

Automated API Testing and Quality Assurance

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

Generate automated tests for your Node.js app via LLMs without developers having to write a single line of code.

Proactive, Open source API security → API discovery, API Security Posture, Testing in CI/CD, Test Library with 1000+ Tests, Add custom tests, Sensitive data exposure

Terminal API client for HTTP/GraphQL/gRPC with support for SSH tunnels, WebSockets, SSE, Workflows, Profiling, OpenAPI, Kubernetes port-forwarding and response diffs.

Record your test suite's HTTP interactions and replay them during future test runs for fast, deterministic, accurate tests.

List of awesome API clients. Postman and Insomnia alternatives

🔥 GUI client for gRPC/gRPC-Web