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DFlow serves live market data over two WebSocket streams on the Trading API. Subscribe to the pairs you want and read updates each slot. See Endpoints for the WebSocket URLs and access details.

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Connecting

As a security best practice, keep your DFlow API key on the backend, not in browser code where anyone can read it. Stream through a backend proxy that holds the key, connects to DFlow, and relays messages to the browser. In production, access to the quote and book streams is granted per API key: a key that works for /order is not automatically allowed on the streams. Reach out to the team to request stream access on your key.

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Quote Stream

The quote stream returns a live bid and ask for any pair of token mints, across direct and one-hop routes. New quotes stream out as the underlying liquidity moves, so you read prices as they change without polling. DFlow builds each quote by routing a $10 USDC equivalent trade through the best path in each direction, so the bid and ask are the rates that trade would execute at. For the full message format and parameters, see the Quote Stream API. The Stream Top-of-Book Quotes recipe shows how to connect and read updates in code.

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Book Stream

The book stream gives you ten levels of order book depth per side, with the mid price and tick size. Levels are cumulative from the spot outward, so each level carries the total size available up to that price. The book stream covers direct routes only. For the full message format and parameters, see the Book Stream API. The Stream Order Book Depth recipe shows how to connect and render depth in code.

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Accuracy

Quotes and book levels are approximations. DFlow computes them at runtime from current routes, so they may differ from the quote you receive at order time. Treat them as a live read on the market, not a guaranteed execution price.

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Choosing a Stream

Use the quote stream for price displays, pre-trade pricing, and watching many pairs at once. Use the book stream when you need depth: order book visualizations, depth charts, and sizing larger trades against available liquidity.