{"name":"npv","title":"Net Present Value (NPV) Calculator","category":"valuation","description":"NPV of a cash-flow series at a discount rate (index 0 = initial outlay).","price_usd":0.002,"input_schema":{"type":"object","properties":{"discount_rate_pct":{"type":"number","description":"Discount rate as a PERCENT (10 = 10%)"},"cash_flows":{"type":"array","description":"Array of cash flows; index 0 is t=0 (often negative)"}},"additionalProperties":false,"required":["discount_rate_pct","cash_flows"]}}