Live perpetual-futures funding across the coin universe. Positive funding means longs pay shorts (crowded long); negative means shorts pay longs (crowded short). Shown per 8h and annualized (APR).
Universe = Hyperliquid perps. The API also serves Binance / OKX / Bybit cross-exchange funding.
The tax the crowd pays to stay in a trade.
Perpetual futures never expire, so exchanges use a funding rate to keep the perp price pinned to spot — a small payment exchanged between longs and shorts every interval (typically 8h; hourly on Hyperliquid).
Persistently high funding signals crowded, over-leveraged positioning that often unwinds violently — extreme positive funding precedes long squeezes, extreme negative precedes short squeezes. Annualizing (APR) makes the carry cost obvious.
curl -H "X-API-Key: cdk_live_yourkey" \ https://cryptodataapi.com/api/v1/derivatives/funding-rates
See the funding rates endpoint docs.
Funding is the rare derivatives series with real depth behind it: Hyperliquid's hourly rate is archived back to May 2023, close to the venue's own launch. Join it onto candles on the hourly timestamp and you have a carry series long enough to cover a full cycle, rather than the few months most vendors can show.
curl -H "X-API-Key: cdk_live_yourkey" \ "https://cryptodataapi.com/api/v1/backtesting/funding?symbol=BTC&exchange=hyperliquid&start=2023-06-01&limit=10000"
Historical open_interest and mark_price are null on Hyperliquid rows before ~Mar 2026 — no source has them, so their absence is honest rather than a gap in our capture. The funding rate itself is complete.