A Ruby library for using the BreweryDB API.

Buffer is an API Wrapper Gem for Bufferapp.com's API

Ruby client for DatoCMS API

Ruby client for the Dota 2 WebAPI

Integration with MaxMind GeoIP2 API

Ruby wrapper for the Gowalla API

This is a wrapper for RunKeeper Health Graph RESTful API.

Implements Heap's server-side API

Create ActiveModel-compliant objects for your JSONAPI-based API

kintone API client for Ruby.

Ruby library for the WHM & cPanel API; It's not a half day or anything like that

Ruby client library for Metabase API

Magic: The Gathering SDK is a wrapper around the MTG API located at magicthegathering.io

Parse Server Ruby Client. Perform Object-relational mapping between Parse Server and Ruby classes, with authentication, cloud code webhooks, push notifications and more built in.

Ruby gem to easily connect to Rancher API. Via this gem you can do anything that API lets you to do it

A Ruby wrapper for the Rdio API

Black-box web app configuration testing

Gem for access to SendGrid WEB API from rails

Gem to use the SurveyGizmo.com REST API, v3+

And here would be description.