API Trading

LMAX Global Application Programming Interface (API) technology enables clients to automate FX trading and CFD trading. With messages available in XML/JSON format clients can either choose to develop their own wrapper or use LMAX Exchange customisable Client Libraries (Java, .NET) or LMAX Exchange FIX protocol to simplify the integration.

LMAX Global API/FIX users benefit from:

  • Free direct access to all markets on LMAX Global
  • Ultra low latency, anonymous trading
  • Secure protocol
  • Access up to 20 levels of market depth (via FIX only)
  • Ability to place Stop-Loss, Stop-Profit or entry orders
  • Access to a knowledgeable API technical support team
  • Risk-free testing in the LMAX Exchange demo environment
API Trading


Free of charge if $3m notional traded per month,
otherwise flat fee of $75 per month.

FIX trading:
Free of charge if $100m notional traded per month,
otherwise flat fee of $300 per month

Top of book: Free of charge
Depth: $2,500 Flat fee. Free if $500m notional traded or $5,000 in commission paid per month

Inactivity fees:
$50 per month (after 6 months of trading inactivity)


To use LMAX Global APIs, you must:
Enter into a license agreement with LMAX Global – LMAX Global API Agreement (PDF).
Have access to the expertise to implement complex computer programs in the supported languages.
Understand you will be charged an inactivity fee if the minimum trading thresholds are not met.


Please send an email to tam@lmax.com request our the API Libraries
LMAX Instruments (CSV)