Make a connection to the prooflink connect api for single sign on authentication

Basic Gem to query URLs in parallel

Ruby wrapper for the Propublica Nonprofits API https://projects.propublica.org/nonprofits/api/v2

Gem Prospector allows your team to stay on top of important updates to gems in your Ruby project.

It provides an interface to use proteus features

Financial engineering module of Hydrogen Atom

Support for Protobuf files in Confluent Schema Registry

Add the Keybase open protocol for identity proofs to your Rails app. There's a bunch of docs for how to use it.

Proxi Clean will check your proxy and tell you if it's working or not.

Manage HTTP(S) and SOCKS proxies for Rails apps. Supports ActiveRecord and Mongoid as ORM.

A library to interact with proxmox 3.x

ProxyBonanza Ruby API Client Wrapper

Proxy server

A Ruby wrapper for working with the ProZ.com 2.0 API, a REST-like API for interacting with ProZ.com services.

Pin Payments API wrapper inplemented using rom-rb HTTP adapter.

PRX Access is a gem to supply authentication headers and descend the HAL hypermedia link tree on PRX's APIs.

Rails integration for next generation PRX Authorization system.

Client for PRX OAuth2 API (v2)

A lightweight ruby client for Patient Study Calendar's RESTful HTTP API

If you not sure, think a little about using of Yandex Kassa instead :)