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- yfinance confirmed not viable (OPRA only, KC=F not covered) - CFTC COT combined report is the free immediate path (URL change only) - ICE Report Center settlement data viable with WebICE login automation - Barchart OnDemand has correct coverage but requires paid subscription - All OpenBB providers, Polygon.io, Nasdaq Data Link confirmed no KC=F coverage Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>