WebSocket API Reference
The real-time market-data channels and message schemas.
This is the complete reference for the Market Data WebSocket API — the channels you subscribe to and the messages the server streams back. It covers:
- Quotes — real-time top-of-book quotes.
- Depth of Market (DOM) — bid/ask price ladders and sizes.
- Histograms — volume-at-price data.
- Charts — historical and streaming bar data, including tick charts.
New here? Start with Getting Started to obtain access and authorize the connection, then see Real-Time Data via WebSocket for the connection and subscription protocol.
Pick a channel in the sidebar to see its subscribe request and the message schema the server streams in response.