Public Channels

Public channels — no authentication required.

Channels

Channel	Example	Frequency	Guide
`l2:bbo:{instrument}`	`l2:bbo:BTC_USDC-PERPETUAL`	On BBO change	bbo
`l2:perps:{freq}:{instrument}`	`l2:perps:100:BTC_USDC-PERPETUAL`	100ms, 250ms, 500ms. Cache recovery with `since: {}`	l2_orderbook
`l2:perps:grouped:{bucket}:{instrument}`	`l2:perps:grouped:0.5:ETH_USDC-PERPETUAL`	250ms. Cache recovery with `since: {}`	l2_grouped
`trades_perp:{instrument}`	`trades_perp:BTC_USDC-PERPETUAL`	On trade. Last 100 on subscribe with recovery	trades_perp
`trades_option:{instrument}`	`trades_option:BTC_USDC-31OCT25-130000-C`	On trade. Last 100 on subscribe with recovery	trades_option
`index_price:{token}`	`index_price:BTC`	On change	—
`index_candles:{pair}:{resolution}`	`index_candles:BTC_USDC:60`	Live candle update	index_candles

Parameters:

{instrument} — Instrument name. Perps: BTC_USDC-PERPETUAL, ETH_USDC-PERPETUAL. Options: BTC_USDC-31OCT25-130000-C
{freq} — Update frequency in milliseconds: 100, 250, 500
{bucket} — Price bucket size for grouped book. ETH: 0.1, 0.2, 0.5, 1, 10, 100. BTC: 1, 2, 5, 10, 100, 1000
{token} — Token symbol: BTC, ETH, ARB
{pair} — Trading pair: BTC_USDC, ETH_USDC, ARB_USDC
{resolution} — Candle period: 1S, 1 (1m), 5, 15, 30, 60 (1h), 240, D, W, M

All prices and amounts are JSON strings to preserve decimal precision.

For the index_price channel, the payload is a simple JSON object with value (number) and timestamp (ms). No dedicated page — subscribe to index_price:BTC and receive { "value": 50000.5, "timestamp": 1704067200000 }.