{"uid":"cap_5t0n1_SH6zCuXCUrt6YLU","slug":"us-treasury-yield-curve-constant-maturity-yields-55489626","name":"US Treasury Yield Curve — Constant-Maturity Yields","description":"US Treasury yield curve — constant-maturity market yields from 1-month to 30-year, daily history.","url":"https://marketdata.use.x402atlas.com/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":{"limit":{"type":"integer","maximum":50000,"minimum":1,"description":"Max observations returned"}}}},"additionalProperties":false},"output":{"type":"object","required":["type"],"properties":{"type":{"type":"string"},"example":{"type":"object","required":["queried_at","series","count","observations"],"properties":{"count":{"type":"integer","description":"Number of observations returned."},"series":{"type":"string","description":"Which macro series this response is for."},"queried_at":{"type":"string","format":"date-time","description":"UTC timestamp when this bridge queried the upstream."},"observations":{"type":"array","items":{"type":"object"},"description":"Raw upstream observations for the series, passed through as reported (shape varies by series)."}}}}}}},"responseSchema":{"type":"json","example":{"count":1,"series":"treasury-yields","queried_at":"2026-07-06T12:00:00Z","observations":[{"date":"2025-06-01","yield_2_year":3.9,"yield_10_year":4.2,"yield_30_year":4.5}]}},"example":null,"exampleRequest":null,"tags":["x402"],"displayCostAmount":"0.015","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":{"p10Cents":"1.5000","medianCents":"1.5000","p90Cents":"1.5000","minCents":"1.5000","maxCents":"1.5000","p95Cents":"1.5000","sampleCount":1,"varies":false,"failureChargeRate":null},"sessionDeposit":null,"pricing":{"kind":"static","summary":"$0.015/call","primary":{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.015","per":"call","confidence":"exact"},"accepted":[{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.015","per":"call","confidence":"exact"}]},"paymentMethods":[{"uid":"pm_U3qfDhTNx3K6C2oyhTIU0","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"0.015","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 constant-maturity yields across the full curve from 1-month to 30-year, with historical date range filtering.","exampleAgentPrompt":"Pull the US Treasury constant-maturity yield curve for every trading day from January 1 to March 31, 2025 — I need all maturities from 1-month to 30-year.","exampleUseCases":null,"resultDescription":"Returns daily observations of US Treasury constant-maturity yields across all standard maturities (1-month, 3-month, 6-month, 1-year, 2-year, 3-year, 5-year, 7-year, 10-year, 20-year, 30-year), with observation dates and rate values in percentage terms. Supports filtering by exact date or date range, and pagination via limit parameter.","failureModes":["Date out of range — no Treasury data available before Fed series start date","Invalid date format — must be YYYY-MM-DD","No data for requested date — weekend or holiday with no observation","Limit exceeded or zero results returned for narrow date range","Payment failure — x402 micropayment of $0.015 USDC not processed"],"whenToPreferThis":"Use this endpoint when you need official US Treasury constant-maturity benchmark yields — the risk-free rate curve used in bond pricing, spread analysis, duration modeling, or macro research. Prefer this over inflation or CPI endpoints when the specific need is nominal interest rates or yield curve shape (normal/inverted/flat). Best for daily granularity with historical depth; not for intraday rate movements.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-10-12T06:43:08.371Z","isFirstParty":false,"canonicalSlug":"us-treasury-yield-curve-constant-maturity-yields-55489626"}