{
  "id": "api:x402-345acbce6e1c8e13",
  "kind": "api",
  "name": "cryptofeed402.site/perps/BTC",
  "description": "Perpetual futures funding rate and open interest snapshot for one Hyperliquid perp (any listed coin, e.g. BTC or HIP-3 xyz:TSLA): current hourly funding, 8h and annualized rate, next_funding_time (next UTC hour) and time_to_next_seconds, open interest in coins and USD, 24h volume, mark and oracle price, premium, 24h change, and whether it ranks in the top 10 funding extremes. Unknown symbol 404; failed calls are never charged. JSON. Free sample at /samples/perps. $0.002 USDC per call on Base.",
  "category": "x402",
  "url": "https://cryptofeed402.site/perps/BTC",
  "price": null,
  "x402": true,
  "meta": {
    "network": "eip155:8453",
    "scheme": "exact",
    "pay_to": "0x93e4B468A88B1f084Efc781ec7A1E2D195a40D22",
    "method": "GET",
    "last_updated": "2026-11-13T15:49:24.921Z"
  },
  "trust": null
}