curl --request GET \
  --url https://api.0xarchive.io/v1/openinterest/{symbol}/current \
  --header 'X-API-Key: <api-key>'

{
  "success": true,
  "data": {
    "symbol": "BTC",
    "coin": "BTC",
    "timestamp": "2025-01-21T10:30:00.000Z",
    "open_interest": "500000.00",
    "mark_price": "42500.50",
    "oracle_price": "42498.25",
    "day_ntl_volume": "10000000.00",
    "prev_day_price": "42000.00",
    "mid_price": "42500.75",
    "impact_bid_price": "<string>",
    "impact_ask_price": "<string>"
  },
  "meta": {
    "count": 123,
    "next_cursor": "<string>",
    "request_id": "3c90c3cc-0d44-4b50-8888-8dd25736052a"
  }
}