Futures — Open Interest

GET /futures/open-interest/:symbol

Aggregated open interest across Binance, OKX, and Bybit perpetual futures markets.

Cost: $0.03 USDC

Path Parameters

Param	Type	Description
symbol	string	Symbol (e.g. BTC, ETH, SOL)

Request Example

curl -H "x-payment: <proof>" \
  https://api.foursec.xyz/futures/open-interest/BTC

Response

{
  "symbol": "BTC",
  "timestamp": "2026-07-08T14:30:00Z",
  "total_oi_usd": 18500000000,
  "exchanges": {
    "binance": {
      "oi_usd": 9200000000,
      "oi_coins": 159000,
      "share_pct": 49.7
    },
    "okx": {
      "oi_usd": 5800000000,
      "oi_coins": 100000,
      "share_pct": 31.4
    },
    "bybit": {
      "oi_usd": 3500000000,
      "oi_coins": 60500,
      "share_pct": 18.9
    }
  },
  "interpretation": "High OI concentration on Binance (49.7%). Total OI at $18.5B indicates significant leverage in market."
}

Interpretation

Rising OI with rising price = bullish (new money entering longs). Rising OI with falling price = bearish (new money entering shorts). Falling OI = deleveraging regardless of direction.

Data Source

CCXT fetchOpenInterest for Binance, OKX, Bybit. Cache TTL: 30 seconds.

Related Endpoints

• Long/Short Ratio — position bias
• Liquidation Heatmap — OI at risk