{"uid":"cap_wE2x_vHwYgi-knVoJR2Dw","slug":"us-treasury-par-yield-curve-rates-60e8e0c5","name":"US Treasury Par Yield Curve Rates","description":"X402 micropayments server — AI agents pay USDC for OFAC screening, rates, and billing verification.","url":"https://x402helper.xyz/89e509/treasury/rates?utm_source=zero.xyz","method":"GET","headers":{},"bodySchema":{"type":"object","$schema":"https://json-schema.org/draft/2020-12/schema","required":["input"],"properties":{"input":{"type":"object","required":["type","method"],"properties":{"type":{"type":"string","const":"http"},"method":{"enum":["GET"],"type":"string"},"queryParams":{"type":"object","required":[],"properties":{"year":{"type":"integer","default":null,"maximum":2100,"minimum":1990,"description":"Calendar year of the par yield curve (default current)"}}}},"additionalProperties":false},"output":{"type":"object","required":["type"],"properties":{"type":{"type":"string"},"example":{"type":"object"}}}}},"responseSchema":{"type":"json","example":{"result":{},"success":true}},"example":null,"exampleRequest":null,"tags":["x402"],"displayCostAmount":"0.0195","displayCostAsset":"USDC","priceDynamic":false,"priceHint":null,"priceStatus":"priced","priceSource":"probe","requiresHandshake":false,"reviewCount":0,"rating":{"score":"0.00","successRate":"0.00","reviews":0,"stars":null,"state":"unrated"},"availabilityStatus":"unknown","priceObserved":null,"sessionDeposit":null,"pricing":{"kind":"static","summary":"$0.0195/call","primary":{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.0195","per":"call","confidence":"exact"},"accepted":[{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.0195","per":"call","confidence":"exact"}]},"paymentMethods":[{"uid":"pm_LYWkYfZ-fxjVuOz9ZQhcL","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"0.0195","costPer":"request","priority":0,"asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","unit":"request","depositMicros":null,"planRef":null}],"brandName":null,"brandSlug":null,"brandBaseUrl":null,"brandDocsUrl":null,"whatItDoes":"Returns US Treasury par yield curve rates for a specified calendar year, accessible via x402 USDC micropayment.","exampleAgentPrompt":"Can you pull the US Treasury par yield curve rates for 2022? I need the benchmark yield data for that calendar year.","exampleUseCases":[{"title":"Fixed income portfolio benchmarking","prompt":"Pull the US Treasury par yield curve rates for 2023 — I need the benchmark yields to compare against our corporate bond portfolio returns."},{"title":"Historical rate analysis for modeling","prompt":"Fetch the Treasury par yield curve data for 2020, I'm building a discounted cash flow model and need that year's risk-free rate benchmarks."},{"title":"Current yield curve for market research","prompt":"What are the current US Treasury par yield curve rates? I want to see where rates are sitting across maturities right now."}],"resultDescription":"Returns a JSON object containing US Treasury par yield curve rates for the requested year (or current year by default), including yield values across various maturities. Response includes a success flag and a result object with the rate data.","failureModes":["Year out of supported range (1990–2100) returns validation error","Treasury data unavailable for requested year returns empty or error result","Payment failure via x402 protocol blocks access to the endpoint","Invalid query parameter type (non-integer year) causes request rejection","Network timeout if Treasury data source is temporarily unavailable"],"whenToPreferThis":"Choose this endpoint when you need US Treasury par yield curve data and are operating in an x402-capable agent environment that can handle USDC micropayments. Suitable for financial modeling, fixed income benchmarking, or macro research workflows where programmatic access to government yield data is needed without a traditional API key subscription.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-10-31T18:42:17.162Z","isFirstParty":false,"canonicalSlug":"us-treasury-par-yield-curve-rates-60e8e0c5"}