Perp Funding Spread

1. DIY — Binance vs Bybit, joined client-side

Two parallel fetches through this Worker's existing exchange proxies, intersected by symbol, sorted by absolute spread. Polls every 30 s. Two-venue coverage only.

Binance (/api/binance-tracker/perp/premiumIndex)
Bybit (/api/bybit-tracker/market/tickers?category=linear)
Spread = Bybit − Binance
Annualized = spread × 3 × 365 (assumes 8h funding intervals)
# Pair Binance funding Bybit funding Spread Annualized
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2. Vike API — pre-ranked across 6+ venues

One JSON-RPC call to vike.io/mcp's perp_funding tool. Vike has already joined every major perp venue (bybit, lighter, aster, coinbase, hyperliquid, bingx, kucoin, …), normalized to daily %, and surfaced the top long/short legs by spread.

Per row: optimal long_exchange + short_exchange
Filtered to spreads ≥ 0.3 % daily
All metrics already normalized to daily %
# Symbol Long here Long daily Short here Short daily Spread daily
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