BitInstant is a rapid bitcoin transferring service. Users can use the BitInstant system for numerous financial transactions such as transfers, deposits, and withdrawals. BitInstantâ€™s rate of transaction operates almost instantaneously, depending on the bitcoin marketâ€™s current pace. They model their transactional system to dynamically reflect the real time market conditions. Their RESTful API exposes data retrieval and transactional functionality, and returns JSON-encoded data.