WebSocket Limits

Subscription caps, replay limits, idle timeouts, and data-range constraints.

Access
Plan-gated by route and depth
Replay
Speed varies by plan
Limits
Subscriptions and range caps

Limits

Subscription caps, replay limits, idle timeouts, and range constraints.

WebSocket limits by tier

TierSymbolsHistorical DepthMax Range/RequestMax SubscriptionsMax Replay Speed
FreeNo WebSocket access----
BuildAll365 daysUnlimited2550x
ProAllUnlimitedUnlimited100100x
EnterpriseAllUnlimitedUnlimited2001000x

WebSocket access is available on Build tier and above. See pricing for the current tier posture.

Connection constraints

ConstraintLimitDescription
Message metering1 credit/msgEach WebSocket message counts as 1 API credit toward monthly quota
Idle timeout (with subscriptions)60 secondsSend ping every 30s to keep alive
Idle timeout (no subscriptions)5 minutesConnections without subscriptions timeout after 5 minutes
Subscription rate limit10/secondMax subscribe/unsubscribe operations per second
Concurrent replay tasks1One replay per connection at a time (multi-channel counts as one replay)
Multi-channel constraintSame exchangeAll channels in a multi-channel replay must be from the same exchange (e.g., all Hyperliquid or all Lighter; HIP-3 and HIP-4 are separate exchanges and cannot be mixed)
Per-request range limitTier-basedFree: 30 days max, Build/Pro/Enterprise: Unlimited
Data availabilityVaries by channelHyperliquid: April 2023+ (orderbook snapshot spacing varies by market activity and query window; OI/funding: May 2023+, candles: March 2025+, liquidations: December 2025+, L4: March 2026+). Lighter: August 2025+ (trades, candles, OI, funding), January 2026+ (L2 orderbook), March 2026+ (L3 orderbook). HIP-3: February 2026+ for trades, candles, orderbook, OI/funding, and liquidations; L4 March 2026+. HIP-4: May 2026+ for L2/L4 orderbook, trades, OI, and order lifecycle (no funding, no liquidations, no candles by design).