ELX Futures, L.P. is a fully electronic alternative futures and bonds exchange founded by leading global financial institutions with the goal of bringing the benefits of enhanced speed, liquidity and cost-efficiency to all market participants. 

ELX Application Program Interface's (API's) are the software interfaces available between the ELX Platform and a participant’s trading software application(s). ELX offer two API's - an interface is based on BGC’s proprietary API, and an ELX FIX interface based on a specialised FIX variant dialect for participants who prefer using a standard FIX protocol.

ELX Futures, L.P. (ELX) has implemented a vendor connectivity program to connect Independent Software Vendors (ISVs) to its platform - OnixS is one such pre-certified and tested ELX ISV.

The OnixS directConnect: ELX solution bundles include:

• precertified, calibrated and supported ELX FIX Dialect variant
• the OnixS high performance FIX Engine products
• ELX specific market data and trading client reference implementation samples