This tool provides a one-command setup, configuration and validation for cloud servers.

Rails validation gem which ensures no contact information can be passed through a field. Contact information is twitter handles, email addresses, and phone numbers.

Firebase JWT validation

A Ruby gem for interacting with Swiss Post APIs including parcel tracking, address validation, and other postal services

Includes optional reader/writer delegation and unobtrusive errors validation

Write self-documenting parameter validation and type-casting in your API actions. Docs and development at https://github.com/ozydingo/despecable.

Adds a Rails-esque validation method for use in Rails 3 with ActiveRecord or DataMapper

Digget makes creating search endpoints easier. It allows you to put some validations on incoming parameters and use these parameters to filter models.

Transform database constraint errors into activerecord validation errors

Hash validation for 'options'-like methods.

Property types that add CHECK constraints to your DB and validations to your model. Data integrity FTW.

Paper-thin Facebook validation and signed request parsing Rails plugin

Gem to remove previously set validations

Adds ActiveModel validation for domain format.

ActiveModel validations for domains with fully localization support.

This gem is part of the Deployment and Orchestration for Puppet or DOP for short. dop_common is a library for the parsing and validation of DOP plan files.

Dr Nic's Magic Models - Invisible validations, assocations and Active Record models themselves!

Mutations gem interface implemented with `dry-rb`’s validation schemas.

Dependency-free object validation library for Ruby 1.8.7+

ElasticSearch Queries, gem that allows elastic creation of complex ES queries, and end up in hashes. Validation enabled. Uses eapi gem)