Http Client GitHub Repositories (2026) · Open Source Tools

Feign makes writing java http clients easier

Asynchronous, non-blocking HTTP & WebSocket client for the JVM

Your go-to microservice framework for any situation, from the creator of Netty et al. You can build any type of microservice leveraging your favorite technologies, including gRPC, Thrift, Kotlin, Retrofit, Reactive Streams, Spring Boot and Dropwizard.

urllib3 is a user-friendly HTTP client library for Python

PHP Curl Class makes it easy to send HTTP requests and integrate with web APIs

HTTP (The Gem! a.k.a. http.rb) - a fast Ruby HTTP client with a chainable API, streaming support, and timeouts

Asynchronous streaming communication for Clojure - web server, web client, and raw TCP/UDP

HTTP client generator / KSP plugin for Kotlin Multiplatform (Android, iOS, Js, Jvm, Native, WasmJs)) using KSP and Ktor clients inspired by Retrofit https://foso.github.io/Ktorfit

Easy to use C++17 HTTP Server with no compromise on performances. https://matt-42.github.io/lithium

The practical HTTP client that is fun to use.

Request HTTP(s) URLs in a complex world.

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

Fully featured, spec-compliant HTML5 server-sent events library

Nimbus automatically analyzes your routes and validation rules to build interactive request schemas and a native interface for testing and exploring your APIs

Load testing framework, inspired by Locust

An opinionated HTTP library for .NET applications built on HttpClient message handlers. Provides request de-duplication, prioritised concurrency limiting, speculative background fetching and optional response caching.

A library for managing concurrent asynchronous operations in .NET. Provides bounded concurrency, priority scheduling and key-based serialization over a single queue, with Task and IObservable APIs.

(Mirror) An HTTP client library for ruby

Aplus Framework HTTP Client Library

HTTP requests for Gophers