Square helps consumers to pay with card in a mobile environment. For a business that prefers to keep all sales information in a settled location, Square Stand is the choice. In contrast, if the enterprise is mobile, Square Reader is the alternative. With the aim to ease commerce, Square offers The Connect API. This application provides HTTP endpoints to retrieve reports for users' payments, refunds, and settlements. It also allows to manage merchant's items. Square Connect API is about point of sale transactions with cards using iPad, iPhone, and Android. Additional resources of transactions, OAuth, and eCommerce are available on Square site.
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