The most intuitive desktop API client. Organize and execute REST, GraphQL, WebSockets, Server Sent Events, and gRPC 🦬

Awesome API Clients & Postman Alternatives (Open Source, Free, Pro)

A text-based HTTP client in the browser. An interface-less Postman.

A simple and easy to use REST API client that runs in your terminal (TUI). Open-source alternative to Postman.

A developer and git friendly offline-only API client designed for efficient API testing and development. It stores the collections and requests as YAML files on your local file system, making it convenient to organize, reuse, and share your APIs. (Alternative to Postman and Insomnia)

No Cloud. No Bloat. Just Requests. A lightweight, offline-first API client built with Python. Part of the Nano Product Family

High-Performance API Testing Platform

A modern, feature-rich API client and testing studio for developers. Build, test, and debug APIs with an intuitive interface.

pyapptest is a developer-friendly, plug-and-play API testing utility built with Python. It helps you auto-detect, test, and document API endpoints from popular frameworks like FastAPI, Flask, and Django — all within a clean Streamlit-based interface.

RESTUI API Client In Your Terminal

Modern API testing client built with Go + Vue3 + Wails3. Postman alternative with collections, environment variables, and beautiful UI. Cross-platform desktop app for HTTP API testing and debugging.

Fiak, the most intuitive desktop API client based on Yaak with a few tweaks. Organize and execute REST, GraphQL, WebSockets, Server Sent Events, and gRPC.

Dead simple Postman/Bruno http client alternative that is file-based, minimal, git friendly and best for http testing.

The professional, privacy-focused alternative to Postman. 100% local, scriptable, and built with pure Java for maximum efficiency.

API Client for Purists. 5MB. 50ms startup.

Pingstream is a lightweight, Streamlit-based API testing tool using curl under the hood. Designed for low-RAM systems, it supports GET, POST, PUT, DELETE with JSON, headers, file uploads, and Postman/OpenAPI import.

Comprehensive API testing tool with support for all major HTTP methods, authentication, and CORS-friendly proxy. Features include request import/export, real-world samples, and local storage for data persistence. Built with Next.js, and TypeScript for optimal performance and developer experience.

🗂️ A community hub for Bruno API collections. Pre-built, tested, and documented collections for popular APIs (BetterAuth, Stripe, Supabase...). Git-friendly, privacy-first, open source.

A modern, lightweight API testing tool built with Next.js 16, React 19, and TypeScript. Inspired by Postman and Requestly, designed for developers who need a fast, clean interface for testing APIs.