ISVs listed below are compliant in the indicated versions of the CBOE CMi API and/or CBOE FIX 4.2 API. API V2 conformance is required for Single Stock Futures trading on OneChicago, order entry to CBOE Regular Hours Trading (RTH) session, and receipt of CBOE product information and RTH market data through these interfaces. API V2.5 conformance is required for CBOE Hybrid and CBOE Futures Exchange (CFE) trading. Successful completion of Phase 3x in each version of the testing protocol is required to be considered compliant.