Open Interest

Type: NONE

Weight: 1

GET /fapi/v1/openInterest

Present open interest of a symbol. Public endpoint: no X-MBX-APIKEY, timestamp or signature required.

Request

GET /fapi/v1/openInterest?symbol=BTCUSDT

Query params

Name	Type	Required	Notes
symbol	string	yes

Response — 200

{
  "symbol": "BTCUSDT",
  "openInterest": "1234.567",
  "time": 1714261234567
}

openInterest is long_oi + short_oi in contract (base) units, as on Binance. Per-side USD open interest and the per-market OI caps are available on the native API (GET /api/v1/funding-rates/{symbol}, GET /api/v1/open-interest/{symbol}); orders that would push a side over its cap are rejected with OI_CAP_EXCEEDED on the native API and -2010 on FAPI.

Errors

HTTP	code	msg
400	-1121	Invalid symbol.