Retrieves historical futures basis data showing the spot-futures price differential. Positive basis indicates futures trading at premium, negative indicates discount. Ideal for: cash-and-carry arbitrage, market sentiment analysis, identifying funding opportunities.

Analyzes cryptocurrency spot and futures markets to identify profitable funding rate arbitrage opportunities. Uses Heurist's FundingRateAgent to scan for price discrepancies between spot and futures markets, helping traders find optimal entry points for funding rate trading strategies. | Input: Accepts an optional minimum funding rate threshold (default 0.0003 per interval) to filter opportunities, with debug mode toggle | Output: Returns a list of spot-futures trading opportunities that meet the funding rate criteria, including relevant market data and arbitrage potential | Use cases: I want to find spot-futures arbitrage opportunities with high funding rates; Show me cryptocurrency pairs with favorable funding rate spreads; I need to identify profitable funding rate trading setups; Get me opportunities where spot-futures price differences exceed my threshold | Cost: 0.01 on base