faraday
RecommendedHTTP/REST API client library.
HTTP Clients
rest-client
A simple HTTP and REST client for Ruby, inspired by the Sinatra microframework style of specifying actions: get, put, post, delete.
http
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.
httparty
Makes http fun! Also, makes consuming restful web services dead easy.
curb
Curb (probably CUrl-RuBy or something) provides Ruby-language bindings for the libcurl(3), a fully-featured client-side URL transfer library. cURL and libcurl live at http://curl.haxx.se/
typhoeus
Like a modern code version of the mythical beast with 100 serpent heads, Typhoeus runs HTTP requests in parallel while cleanly encapsulating handling logic.
mechanize
The Mechanize library is used for automating interaction with websites. Mechanize automatically stores and sends cookies, follows redirects, and can follow links and submit forms. Form fields can be populated and submitted. Mechanize also keeps track of the sites that you have visited as a history.
httpi
Common interface for Ruby's HTTP libraries
nestful
Simple Ruby HTTP/REST client with a sane API
open-uri
excon
EXtended http(s) CONnections