Cboe C2 Options Exchange (C2) market participants use a subset of the FIX 4.2 protocol for FIX order entry and drop-copies (FIX Drop).
In addition to FIX Order Entry, the C2 support two types of FIX Drop ports:
The OnixS directConnect: Cboe C2 FIX Order Entry and FIX Drop Handler is a C++ software component (library) that provides low latency direct trading access to the Cboe C2 Options Exchange trading platform.
Cboe DMA solutions
A low-latency Cboe C2 FIX Order Entry and FIX Drop Direct Market Access solution for automated trading frameworks
The OnixS Cboe C2 FIX Order Entry and FIX Drop Handler SDKs include: