FIXSIM
FIXSIM User Guide
FIXSIM is a browser-based FIX Protocol testing and simulation platform used by QA engineers, developers, and integration teams at broker-dealers, OMS/EMS vendors, buy-side firms, and fintech companies worldwide.
Whether you are developing a new Order Management System (OMS) or Execution Management System (EMS), integrating with a broker-dealer, or certifying an exchange API, FIXSIM provides a high-performance FIX testing environment accessible entirely from your browser — no local installations required.
What You'll Find in This Guide
- Getting Started — Connect your FIX engine to FIXSIM for the first time.
- FIX Sessions — Create and manage FIX initiator and acceptor sessions.
- Configuring Sessions — Mirror your production FIX session settings.
- Session Views — Monitor real-time message flows and session state.
- Reports Overview — Understand FIXSIM reporting and blotter views.
- Blotter In — View inbound orders and executions.
- Blotter Out — View outbound orders and execution reports.
- Custom Tags — Configure and apply custom FIX tags to your sessions.
- FIX Session Settings — Detailed session configuration reference.
- App Settings — Manage application-level settings and preferences.
- Rules & Automation — Build automated FIX test scenarios with the Rule Builder.
- Troubleshooting — Resolve common FIX connection and sequence issues.
- Reference — Links to FIX tutorials, sample messages, and glossary.
New to FIXSIM?
Start with the Getting Started guide to connect your first FIX session. For a broader introduction to FIX protocol testing, see What is a FIX Simulator or explore the FIX Protocol Resources library.
