This gems can be used along a server app with jsonformat messages

The esignatur.dk provides methods for developers to integrate API in any ruby application.

Client for accessing the BEARS blockchain.

ruby gem for box.com 2.0 api

Ruby client for https://branch.io API

Simple Ruby client to interact with brightpearl API.

Ruby client to communicate with Centrifugo v2 HTTP API

Simple wrapper for the RubyChina API

Wrapper for Code Climate API

Simple ruby web crawler

FinTS (formerly known as HBCI) is a protocol to programmatically interface with German banks. This gem is a translation of https://github.com/raphaelm/python-fints into Ruby.

Wrapper for using the Last FM API

Easy access to the RubyGems API through a convenient ruby interface

Find repos from api.rubygems.org response, gem spec, github search, etc.

Patches for gem serve, gem push, gem yank, and some utilities to allow use of non-Rubygems.org gem sources

GP webpay, payments, SOAP, payment gateway

hubspot-ruby is a wrapper for the HubSpot REST API

ruby_hubspot_api is an ORM-like wrapper for v3 of the Hubspot API

RubyHue is a library for interacting with Hue light bulbs from Phillips.

Wrapper for the Idescat API