Pre-computed cross-asset correlation matrix for AI trading and portfolio agents. Returns 30-day Pearson correlations on daily simple returns for 6 assets: BTC, ETH, SOL (Coinbase candles), and SPY, QQQ, GLD (Stooq.com CSVs). Output includes both a pairs array (sorted by absolute r descending) and an NxN matrix object for easy lookup. Each pair tagged with relationship strength (negligible / weak / moderate / strong) and direction (positive / negative). Saves the agent from fetching 6 historical price series and running the covariance math. Costs 2 credits ($0.04 USDC). 30-min cache. Bearer auth required.
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