#cross-exchange

The perpetual-futures funding rate for a coin side by side across the major exchanges, and the spread between them — computed live from each venue's public API, no key, nothing stored. A perpetual swap charges or pays funding every few hours to keep its price tethered to spot; when the same coin's funding differs across exchanges, a trader can be long the perp where funding is most negative (and gets paid) and short where it is most positive, harvesting the spread market-neutral. The funding endpoint returns, for a coin, the current funding rate on Binance, Bybit, OKX and Gate.io — per interval and annualised — the venue paying the most, the one charging the most, and the cross-exchange spread (the arbitrage edge). The screener endpoint scans a basket and ranks the coins by the size of that spread, surfacing the biggest funding-arbitrage opportunities. This is the cross-exchange funding-rate / basis-arbitrage cut for crypto — distinct from the single-exchange funding-rates feed (one venue), the spot-versus-perpetual basis and the price APIs in the catalogue. Funding is per interval (most venues settle every 8 hours); annualisation assumes three settlements a day, and intervals can differ by venue, so verify before trading. Coins are bases (BTC, ETH).

api.oanor.com/fundingarbitrage-api

Live cross-exchange perpetual-futures market data — no key, nothing cached. Where single-exchange APIs show one venue, this compares the whole derivatives market across every exchange at once. The contract endpoint takes a symbol (BTCUSDT, ETHUSD) and returns that contract on every exchange that lists it — the mark price, the funding rate, the basis, the open interest and the 24-hour volume on Binance, Bybit, OKX, MEXC, Hyperliquid and the rest side by side, so you can instantly see where funding is richest and where the open interest sits (BTCUSDT trades on dozens of venues with billions in open interest each). The exchanges endpoint is the derivatives-exchange league table, ranked by open interest in BTC, with each venue's 24-hour volume and number of perpetual and futures pairs. The top endpoint surfaces the largest contracts market-wide by open interest or by volume. This is the cross-exchange derivatives layer for any trading, funding-arbitrage, risk or analytics app. Live from CoinGecko, nothing stored. Distinct from single-exchange funding and open-interest APIs — this is the whole perpetual-futures market across exchanges. 4 endpoints.

api.oanor.com/derivatives-api