FIX Engine and Direct Market Access
SDK Solutions

for mission critical trading infrastructure and application frameworks

OnixS Specialist Software

We provide Direct Market Access (DMA) Software Development Kits (SDKs) for mission critical trading infrastructure and application frameworks. Our SDKs are fully supported and designed to enable developers to quickly integrate market data feeds, order entry APIs, and post trade feeds into trading and application frameworks.


Our Products

directConnect Expand / collapse

A suite of venue specific calibrated and certified native protocol and FIX protocol Market Data Handler, Order Routing, Trade Capture and Drop Copy SDK solutions.

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FIX Engines Expand / collapse

Our FIX Engine products are ultra low latency FIX Protocol .NET / C#, C++ and Java SDK implementations to FIX-enable applications and execution/order management systems.

Get your free 30 day evaluation

FIX Support & Tools Expand / collapse

Our reference and support tools include the online OnixS FIX Dictionary for FIX Protocol reference, and FIX Analyser for development and operational support of FIX Protocol infrastructure.

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Why choose OnixS?

OnixS provides easy to use Direct Market Access (DMA) SDK solutions enabling proprietary trading groups, commodity and energy trading firms, application ISVs, investment banks and exchanges to save time and money in the build and ongoing maintenance of trading systems and application frameworks

  • Offered on a low-cost fully-supported subscription basis

  • High-performance multi-platform implementations

  • Minimises the cost of deploying critical trading infrastructure

  • Fast-start to FIX-enable trading, order management and risk management systems

Insights : OnixS

News, views and technical updates from across the industry


Considerations for Deploying FIX Engine SDKs in the Cloud or Private Data Centres

19 November, 2020

In the Cloud or private data centres? What considerations do you need to make when deploying FIX Engine SDKs across different infrastructures?

Working with FIX Repeating Groups - A Technical Guide

5 November, 2020

Understanding FIX Protocol Standards Repeating Groups FIX Protocol Standards Repeating Groups allow a subset of FIX tag fields to repeat multiple ...

FIX Simple Binary Encoding (SBE) Adoption: Understanding Its Origins and Evolution

21 October, 2020

We look at the origins and evolution of FIX Simple Binary Encoding, and explore why FIX Protocol SBE standards usage by CME and for Brokertec is a ...

OnixS CME iLink 3 SDK with SolarflareTM TCPDirect ultra-low Latency Network Stack

7 October, 2020

The OnixS directConnect: CME iLink 3 Binary Order Entry Handler SDK now supports the SolarflareTM TCPDirect ultra-low latency network stack API to ...

BrokerTec to CME Globex Platform Migration Changes to Be Aware Of

23 September, 2020

BrokerTec and EBS products are migrating to the CME Globex platform. While existing CME Globex direct market access APIs will support trading the ...

Release Notes

The OnixS Release Notes are detailed descriptions of new features, improvements and bug fix releases for all OnixS products that are published via an email list server, Twitter, RSS feed and on the web.

We recommend listenning to these Release Note updates via your preferred mechanism(s).


Free 30 day evaluation

Our objective is to provide you with ready to use evaluation SDK download distributions for market access solutions that are specific to your target venue and code base.

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