List of awesome API clients. Postman and Insomnia alternatives
HTTP client library built on SwiftNIO
An ergonomic, privacy-aware Rust HTTP Client
The free, lightweight and multiplatform graphical HTTP client that respects your privacy.
Load testing framework, inspired by Locust
HTTPDirFS is a filesystem that allows you to mount arbitrary websites using the FUSE framework. It comes with a cache system, and Airsonic / Subsonic server support.
HTTP/1.1, HTTP/2, Websocket client (and more) for Erlang/OTP.
A next-generation Scala framework for building scalable, correct, and efficient HTTP clients and servers
The practical HTTP client that is fun to use.
HTTP 1.x proxy that makes old web browsers usable again in the Web 2.0 world.
Request HTTP(s) URLs in a complex world.
Fast, native API client for REST, gRPC, WebSocket and GraphQL. A local-first Postman alternative written in Go: no Electron, no account, no cloud.
Paozhu🧨 C++ Web Framework,(Based on C++20) Support HTTP/1 HTTP/2, Rapid development of CRUD web applications, Include modules HttpServer HttpClient WebSocket ORM
runn is a package/tool for running operations following a scenario.
Awesome API Clients & Postman Alternatives (Open Source, Free, Pro)
The HTTP abstraction library for Clojure/script, supporting OpenAPI, Swagger, Schema, re-frame and more
Fully featured, spec-compliant HTML5 server-sent events library
Static cURL with latest features
Go http.Client redirect policy that drops caller-set headers such as X-Api-Key when a redirect changes origin.
A high-performance, local-first API client & Postman alternative built with Rust, Tauri 2, and Vue 3.高性能、本地优先的 API 调试与测试客户端 (Postman/Insomnia/ApiFox 替代品),基于 Rust + Tauri 2 + Vue 3 打造。
No Postman, Just GetCat! 用 Rust + GPUI 打造的原生跨平台 HTTP 接口调试工具
Unofficial typed .NET SDK for the opencode HTTP API (pre-release; MCP server planned).
Engine-independent TLS fingerprint library for Go — JA3/JA4, uTLS browser impersonation, byte-exact HTTP/2, curl_cffi-style HTTP client. Zero CGO.