hoppscotch
Open-Source API Development Ecosystem • https://hoppscotch.io • Offline, On-Prem & Cloud • Web, Desktop & CLI • Open-Source Alternative to Postman, Insomnia
usebruno
Opensource IDE For Exploring and Testing API's (lightweight alternative to Postman/Insomnia)
httpie
🥧 HTTPie CLI — modern, user-friendly command-line HTTP client for the API era. JSON support, colors, sessions, downloads, plugins & more.
Orange-OpenSource
Hurl, run and test HTTP requests with plain text.
keploy
Open-source platform for creating safe, isolated production sandboxes for API, integration, and E2E testing.
metersphere
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。
httpie
An interactive command-line HTTP and API testing client built on top of HTTPie featuring autocomplete, syntax highlighting, and more. https://twitter.com/httpie
microcks
The open source, cloud native tool for API Mocking and Testing. Microcks is a Cloud Native Computing Foundation sandbox project 🚀
apideck-libraries
Port OpenAPI Specs to Postman Collections, inject test suite and run via Newman 👨🏽🚀
pactumjs
REST API Testing Tool for all levels in a Test Pyramid
serenity-js
A next generation, full-stack acceptance testing framework optimised for collaboration, speed and scale!