WebMock allows stubbing HTTP requests and setting expectations on HTTP requests.

HTTP/REST API client library.

Makes http fun! Also, makes consuming restful web services dead easy.

A simple HTTP and REST client for Ruby, inspired by the Sinatra microframework style of specifying actions: get, put, post, delete.

Rack provides a minimal, modular and adaptable interface for developing web applications in Ruby. By wrapping HTTP requests and responses in the simplest way possible, it unifies and distills the API for web servers, web frameworks, and software in between (the so-called middleware) into a single method call.

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

Like a modern code version of the mythical beast with 100 serpent heads, Typhoeus runs HTTP requests in parallel while cleanly encapsulating handling logic.

An easy-to-use client library for making requests from Ruby. It uses a simple method chaining system for building requests, similar to Python's Requests.

gives something like the functionality of libwww-perl (LWP) in Ruby

Puma is a simple, fast, threaded, and highly parallel HTTP 1.1 server for Ruby/Rack applications. Puma is intended for use in both development and production environments. It's great for highly parallel Ruby implementations such as Rubinius and JRuby as well as as providing process worker support to support CRuby well.

EXtended http(s) CONnections

Amazon Web Services Signature Version 4 signing library. Generates sigv4 signature for HTTP requests.

WEBrick is an HTTP server toolkit that can be configured as an HTTPS server, a proxy server, and a virtual-host server.

EventMachine based, async HTTP Request client

Manages persistent connections using Net::HTTP including a thread pool for connecting to multiple hosts. Using persistent HTTP connections can dramatically increase the speed of HTTP. Creating a new HTTP connection for every request involves an extra TCP round-trip and causes TCP congestion avoidance negotiation to start over. Net::HTTP supports persistent connections with some API methods but does not make setting up a single persistent connection or managing multiple connections easy. Net::HTTP::Persistent wraps Net::HTTP and allows you to focus on how to make HTTP requests.

A multipart form post accessory for Net::HTTP.

Unirest is a set of lightweight HTTP libraries available in multiple languages.

Middleware to handle HTTP caching

Common interface for Ruby's HTTP libraries

A small fast HTTP library and server that runs Rails, Camping, Nitro and Iowa apps.