工具 API

get_ust_yield_rates

Fetch daily US Treasury par yield curve rates. Use when the user asks about Treasury yields, the yield curve, government bond rates, or interest rates across maturities. Returns nominal par yield curve rates for tenors: 1M, 1.5M, 2M, 3M, 4M, 6M, 1Y, 2Y, 3Y, 5Y, 7Y, 10Y, 20Y, 30Y. Fields include date, tenor, and rate. Filterable by year. Costs 1 API call per request. For short-term T-bill discount/coupon rates (4WK-52WK), use get_ust_bill_rates instead.