Nephyr Backtest

This server lets Claude backtest prediction market strategies against actual Polymarket on-chain data. You'd reach for this when you want to validate trading strategies or analyze how different betting approaches would have performed historically without risking real money. It pulls real transaction and market resolution data from Polygon, so you're testing against what actually happened rather than synthetic scenarios. Useful if you're building automated prediction market bots or just want to understand which market timing or position sizing strategies actually work before deploying capital.