Use when an agent must pick the cheapest venue to hold a stock perp or size funding carry. Funding on trade.xyz, Aster, Lighter and OKX normalized to hourly and annualized APR, interval and next funding time, cheapest venue to be long or short, carry spread, optional 24h/7d/30d history; one ticker or tickers=all. Bad params return 400/404 before any charge. Errors: 400, 402, 404, 502. Data, not advice.

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