{"uid":"cap_VgFLkeMI4goiLv4y9rXfe","slug":"us-treasury-par-yield-curve-rates-b70a92e1","name":"US Treasury Par Yield Curve Rates","description":"Daily US Treasury par yield curve rates from the US Department of the Treasury: 1-month to 30-year yields for the latest business days of the current month. Use it for interest rate context, discounting, bond and macro analysis. US public domain.","url":"https://opendata402.com/v1/treasury/yields?utm_source=zero.xyz","method":"GET","headers":{},"bodySchema":{"type":"object","$schema":"https://json-schema.org/draft/2020-12/schema","required":["input"],"properties":{"input":{"type":"object","required":["type","method"],"properties":{"type":{"type":"string","const":"http"},"method":{"enum":["GET"],"type":"string"},"queryParams":{"type":"object","properties":{"days":{"type":"string","pattern":"^([1-9]|1[0-9]|2[0-3])$","description":"Number of latest business days (default 1)."}}}},"additionalProperties":false},"output":{"type":"object","required":["type"],"properties":{"type":{"type":"string"},"example":{"type":"object"}}}}},"responseSchema":null,"example":null,"exampleRequest":null,"tags":["x402"],"displayCostAmount":"0.001","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":"$0.001/call","primary":{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.001","per":"call","confidence":"exact"},"accepted":[{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.001","per":"call","confidence":"exact"}]},"paymentMethods":[{"uid":"pm_pVb3sOjFMgBXyQ3IASEET","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"0.001","costPer":"request","priority":0,"asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","unit":"request","depositMicros":null,"planRef":null}],"brandName":null,"brandSlug":null,"brandBaseUrl":null,"brandDocsUrl":null,"whatItDoes":"Returns daily US Treasury par yield curve rates (1-month to 30-year) for the latest business days of the current month.","exampleAgentPrompt":"What are the current US Treasury par yield curve rates for the last 5 business days — I need the full curve from 1-month to 30-year for a discounted cash flow analysis?","exampleUseCases":[{"title":"Risk-free rate for DCF valuation","prompt":"Pull today's US Treasury yield curve so I can use the 10-year rate as the risk-free rate in my discounted cash flow model."},{"title":"Yield curve inversion monitoring","prompt":"Fetch the Treasury par yield curve rates for the last 10 business days so I can check whether the 2-year yield is still above the 10-year and track the inversion trend."},{"title":"Macro interest rate context","prompt":"I'm writing a market commentary — can you grab the latest US Treasury yields across the full curve from 1-month to 30-year so I can describe where rates stand today?"}],"resultDescription":"Returns a JSON array of daily Treasury par yield curve snapshots for the requested number of latest business days in the current month. Each record includes the date and par yields for standard maturities: 1-month, 2-month, 3-month, 4-month, 6-month, 1-year, 2-year, 3-year, 5-year, 7-year, 10-year, 20-year, and 30-year.","failureModes":["days parameter out of range (must be 1–23) returns a validation error","no data available for the current month yet (e.g. first day of month before any business day closes)","upstream Treasury data source unavailable causes a 5xx or empty response","invalid query parameter format returns a 400 error"],"whenToPreferThis":"Choose this endpoint when you need official US government Treasury par yield curve data for interest rate context, risk-free rate benchmarks, bond pricing, or macro analysis. It sources directly from the US Department of the Treasury (public domain), making it authoritative for any application requiring official rates. Prefer it over scraped or third-party rate aggregators when data provenance matters. Best for current-month, recent-business-day lookups rather than deep historical series.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-10-15T06:38:52.981Z","isFirstParty":false,"canonicalSlug":"us-treasury-par-yield-curve-rates-b70a92e1"}