CoinfloorEX offers HTTP and WebSockets Application Programming Interfaces (API) that are optimised for ultra-low latency connections. We provide native libraries and sample clients in popular programming languages for your use.
Visit documentation in GitHub: https://github.com/coinfloor/API/
https://github.com/coinfloor/API/blob/master/FUTURES.md
https://github.com/coinfloor/API/blob/master/IMPL-GUIDE.md