Introduction

Choosing Your WebSocket API

New integrations: Use Fast API for sub-10ms latency with trading and market data unified in one connection.

Existing integrations: Our original WebSocket APIs remain fully supported:

1. Order Events - Private API for real-time order updates
2. Market Data - Public API for market data feeds

Advantages

Using WebSockets provides several advantages:

• Receive notifications in real time
• Reduce the amount of data you have to transfer over the network
• Reduce latency introduced by polling interval

For example, to keep track of your orders, you might be requesting the Get Active Orders endpoint every five seconds:

1. Request /v1/orders
2. Bring back HTTP header data and a response body
3. Parse the JSON in the response body
4. Compare the latest response against the previous response to see what has changed

Using the private Order Events API, you would subscribe once and receive real time notifications of all order activity.

WebSocket Protocol Resources

For general information about how the WebSocket protocol works, refer to:

• About HTML5 WebSocket
• RFC 6455 The WebSocket Protocol