active_merchant_square

https://github.com/square/active_merchant_square

Use this gem instead of ActiveMerchant gem if you want to use Square's e-commerce APIs (https://squareup.com/developers) with ActiveMerchant. The official ActiveMerchant gem does not support Square because Square shields raw credit card numbers from developers to make PCI compliance easier. This has all ActiveMerchant functionality, plus support of Square's card nonces in the iframe API.