IP2Location.IO Ruby SDK allows user to query for an enriched data set based on IP address and provides WHOIS lookup api that helps users to obtain domain information.

A Ruby SDK enables user to easily implement the checking of WHOIS information for a particular domain into their solution using the API from www.ip2whois.com

A simple library to check for the well-being of an URL

Interface for communicating with Loopia's API

Smartly check whether a given email/domain belongs to a free or disposable mail provider. There are hundreds of lists available in Github repositories or Gists that list various free and disposable email providers. This gem downloads a bunch of these scripts (pre-configured URLs) and parses them to count votes against each domain in the list. We, then, create a Trie structure to efficiently query this data with a given domain or email. For each query, you get back a number specifying how many sources are claiming that the domain is a free or disposable email provider.

Extract root domain from hosts (e.g. www.example will be extracted as example.com). It normalizes punycode domains and considers second-level domain names.

This gem allows easy conversion from punycode ACE email addresses to unicode UTF-8 email addresses and vice-versa.

Sinatra extension for user authentication with portier

A gem that provides text handling for Twitter

Coerce and normalize user inputted URLs

CUI tool to archive URIs using web.archive.org, archive.today, and others