Getting Started with FIX API Development

If you’re interested in financial trading and want to create your own trading applications, then learning about FIX API development is essential. FIX (Financial Information Exchange) API (Application Programming Interface) allows you to connect directly to trading platforms and interact with the financial markets. In this article, we will guide you on the fundamentals of getting started with FIX API development.

Tools and Resources

Before diving into FIX API development, it’s important to have the right tools and resources at your disposal. Here are some key components you will need:

  1. Development Environment: Set up your preferred Integrated Development Environment (IDE) such as Visual Studio or Eclipse for coding and debugging your applications.
  2. FIX Protocol Documentation: Familiarize yourself with the FIX protocol, which specifies the message format and communication methods for FIX API. The FIX documentation is available on their official website and contains comprehensive details about the protocol.
  3. FIX Libraries: Utilize existing FIX libraries or SDKs (Software Development Kits) to simplify the implementation of FIX API. These libraries provide pre-built functions and structures that handle the complexities of the FIX protocol, allowing you to focus on your application’s logic.

Building a Simple FIX API Application

Now that you have the necessary tools and resources, let’s outline the process of building a simple FIX API application:

  1. Establish a Connection: Create a connection to the FIX server using the provided connection parameters. This typically involves providing the server address, port number, and credentials.
  2. Logon: Authenticate yourself with the server by sending a logon message. This message contains your credentials and establishes a session with the server.
  3. Send Market Data Requests: Subscribe to market data by sending appropriate messages to the server. Fetching real-time market prices is crucial for making informed trading decisions.
  4. Create Orders: Implement the functionality to place orders by constructing and sending New Order Single (NOS) messages to the server. These messages specify the instrument, quantity, price, and order type.
  5. Manage Order Execution: Handle order execution-related messages such as Order Status Request (OSR) and Execution Report (ER). This ensures you receive updates on order fills, cancellations, and modifications.
  6. Logout: Properly terminate your session with the FIX server by sending a logout message. This ensures a clean disconnection and releases any held resources.


In this article, we have introduced the basics of getting started with FIX API development. We discussed the essential tools and resources you will need, such as your development environment, FIX protocol documentation, and FIX libraries. Additionally, we outlined the process of building a simple FIX API application, including establishing a connection, authentication, market data requests, order placement, order execution management, and session termination.

Remember, this is just the beginning of your journey into FIX API development. As you gain more experience and familiarity with the FIX protocol, you can explore more advanced features and functionalities to enhance your trading applications.


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