Open Interest

Current open interest for a futures symbol. Passthrough of Binance USDⓈ-M Futures /fapi/v1/openInterest.

Endpoint

GET /fapi/v1/openInterest

Authentication: Public.

Query parameters

Name	Type	Required	Default	Notes
symbol	string	Yes	—	Uppercase futures symbol.
period	string	No	5m	Forwarded to Binance. Effective values match Binance's accepted periods (5m, 15m, 30m, 1h, 2h, 4h, 6h, 12h, 1d).
limit	integer	No	10	Forwarded to Binance.

Note: Binance's official /fapi/v1/openInterest endpoint accepts only symbol (returns the latest snapshot). The period and limit parameters are forwarded but may be ignored by the upstream. For historical series use /openInterestHist.

Response — 200 OK

{
  "symbol": "BTCUSDT",
  "openInterest": "12345.678",
  "time": 1745920800000
}

Errors

HTTP	Cause
422	Missing symbol.
502	Upstream Binance request failed.

Example

curl -s "https://api.pipai.org/fapi/v1/openInterest?symbol=BTCUSDT"