Rate limits, user limits and heartbeats

Websockets

Connection & message limits:

	Max Connections	Max Total Subscriptions	Max msgs to Hydromancer per minute	Orderbooks streamed
Starter	50	500	300	10
Growth	500	5000	3000	50
Scale	1000	10000	6000	100

Note: every address passed in subscription logic counts as 1 subscription for ones where you can pass multiple (applicable to userFills, userOrderUpdates, userTwapStatusUpdates, userNonFundingLedgerEvents, userLeverageUpdates and userIsolatedMarginUpdates).

Subscription type limits:

	Starter	Growth	Scale
userFills	unlimited per key	unlimited per key	unlimited per key
builderFills	3 builders per key, add-ons possible	10 builders, add-ons possible	20 builders, add-ons possible
liquidationFills	1 sub per key	2 subs per key	2 subs per key
allFills (per-coin)	20 coins	100 coins	200 coins
allFills (all coins) - add-on websocket	400$ per connection	400$ per connection	400$ per connection
trades (per-coin)	20 coins	100 coins	200 coins
trades (all coins) - add-on websocket	400$ per connection	400$ per connection	400$ per connection
userOrderUpdates	unlimited per key	unlimited per key	unlimited per key
builderOrderUpdates	3 builders per key, add-ons possible	10 builders, add-ons possible	20 builders, add-ons possible
userNonFundingLedgerEvents	unlimited per key	unlimited per key	unlimited per key
allUserNonFundingLedgerEvents	1 sub per key	2 subs per key	2 subs per key
allTwapStatusUpdates	1 sub per key	2 subs per key	2 subs per key
userTwapStatusUpdates	unlimited per key	unlimited per key	unlimited per key
activeAssetCtx	unlimited per key	unlimited per key	unlimited per key
setOracleUpdates	100 subs per key	100 subs per key	100 subs per key
perpPrices	10 coins	100 coins	200 coins
l4BookUpdates	10 coins	100 coins	200 coins
tpslUpdates	5 coins	50 coins	200 coins
l2Book	10 coins	50 coins	100 coins
l2BookDiff	10 coins	100 coins	200 coins
bbo	20 coins	100 coins	200 coins
candle	10 subs per key	50 subs per key	100 subs per key
userLeverageUpdates	unlimited per key	unlimited per key	unlimited per key
allLeverageUpdates	1 sub per key	2 subs per key	3 subs per key
userIsolatedMarginUpdates	unlimited per key	unlimited per key	unlimited per key
allIsolatedMarginUpdates	1 sub per key	2 subs per key	3 subs per key
fundingRates	1 sub per key	1 sub per key	1 sub per key
builderCompletedTrades	3 builders per key, add-ons possible	10 builders, add-ons possible	20 builders, add-ons possible
builderLiquidations	3 builders per key, add-ons possible	10 builders, add-ons possible	20 builders, add-ons possible

All-coins add-ons (l4BookUpdatesAll, tpslUpdatesAll, l2BookDiffAll, l2BookAll, bboAll, allFills with no coin filter, trades with no coins filter) are separate permission-gated subscriptions. They are not counted as separate per-coin subscriptions.

Need more than the Scale tier allows (e.g. market-making across the full instrument universe)? Bespoke higher limits are available — contact us.

Heartbeat:

• Ping interval: 60 seconds (respond with pong)