Order book

The ORDER_BOOK channel streams the market's order book: open asks and bids aggregated by price. Use it to build a live book or depth view.

Send a SUBSCRIBE with a unique channelUuid, "channel": "ORDER_BOOK", and the market symbol. You can optionally set tickSize to control price aggregation.

{
  "action": "SUBSCRIBE",
  "channel": "ORDER_BOOK",
  "channelUuid": "your-unique-uuid",
  "symbol": "ETH-USD",
  "tickSize": "0.10"
}

Field	Type	Description
channelUuid	UUID	Unique id for this subscription
symbol	String	Market to receive order book for
tickSize	String	(Optional) Price increment for grouping levels. Omit to use market default.

Response

A full snapshot is sent right after a successful subscription. After that, incremental updates are sent when the order book changes. Asks are sorted by price ascending; bids by price descending.

Example snapshot (public connection):

{
  "channelUuid": "b9fd6c03-2a3f-4a77-95d4-1a7b24462802",
  "asks": [
    { "price": "2010.00", "quantity": "15.00", "total": "25.00" },
    { "price": "2000.00", "quantity": "10.00", "total": "10.00" }
  ],
  "bids": [
    { "price": "1990.00", "quantity": "5.00", "total": "5.00" },
    { "price": "1980.00", "quantity": "8.00", "total": "13.00" }
  ]
}

Field	Type	Description
channelUuid	UUID	Matches your subscription
asks	Array	Ask levels: price, quantity at level, total cum.
bids	Array	Bid levels: price, quantity at level, total cum.

Each level has price, quantity (size at that price), and total (cumulative quantity). Authenticated sessions may include extra fields (e.g. your orders at a level); for the Public API you only see the aggregated book.

Subscribe​

Response​

Subscribe

Response