Not a REST call: this is the WebSocket handshake. Connect to the URL below and the exchange answers 101 Switching Protocols; everything after that is frames, not requests.

Public: no key, no signature.

One rolling price-and-volume frame per subscribed futures pair, pushed on the exchange ticker interval.

{ "Method": "subscribe", "CurrencyPairs": ["BTCUSDT"] }

{
  "price": 64180.5,
  "price24hAgo": 63200.0,
  "price1hAgo": 63950.0,
  "price4hAgo": 63700.0,
  "priceChangePercentage": 1.55,
  "volume24h": 1250000.0,
  "low24h": 62800.0,
  "high24h": 64500.0,
  "currencyPairCode": "BTCUSDT"
}

The frame matches the price-and-volume entries returned by GET /api/futures/exchange-data/pairs. Pair codes have no underscore; /ping is shared.