Live perpetual-futures funding rates per market — each market's funding rate as hourly, the standard 8-hour figure and annualized %, alongside mark price and open interest. Ranked by the most extreme (|annualized|) funding by default; pass `coins` to get the funding rate for a specific market (e.g. ["BTC","ETH"]). Real-time crypto perp funding rate feed. Data source: Hyperliquid (dYdX fallback).

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