Messages
Market data
L2 orderbook
Endpoint:
wss://api.testnet.arcus.xyz/v1/ws— one socket multiplexes every channel and RPC request. Click Connect, then send the example subscribe message below to start receiving data.
Periodic full L2 orderbook snapshots for a single market. On subscribe, the server sends the current book up to nLevels price levels per side, then continues to broadcast a fresh full snapshot every ~500ms.
No incremental updates — each message replaces the prior book state. Use l2OrderbookUpdates if you need to maintain your own local book.
WSS
Messages