{"uid":"cap_CG5x4ji0yirHu3UEm9X0Z","slug":"us-treasury-average-interest-rates-730c23a5","name":"US Treasury Average Interest Rates","description":"Monthly average interest rates the US Treasury pays on its outstanding securities, from the official FiscalData API (Average Interest Rates dataset, updated monthly). Query: ?security=Treasury Bills (exact security_desc, optional; e.g. Treasury Notes, Treasury Bonds) &since=2026-01-01 (optional record_date floor) &limit=12 (1-100, newest first). Returns record_date, security type/name and avg rate in percent. Cached 24h.","url":"https://data.greeneris.io/v1/us/treasury-rates","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","HEAD","DELETE"],"type":"string"},"queryParams":{"type":"object","properties":{"limit":{"type":"integer","default":12,"description":"Max records, newest first (1-100)"},"since":{"type":"string","description":"Only records with record_date >= this ISO date"},"security":{"type":"string","description":"Exact security_desc filter, e.g. Treasury Bills"}}}},"additionalProperties":false},"output":{"type":"object","required":["type"],"properties":{"type":{"type":"string"},"example":{"type":"object"}}}}},"responseSchema":{"type":"json","example":{"count":2,"rates":[{"security":"Treasury Bills","record_date":"2026-06-30","security_type":"Marketable","avg_interest_rate_pct":3.706},{"security":"Treasury Bills","record_date":"2026-05-31","security_type":"Marketable","avg_interest_rate_pct":3.741}],"source":"US Treasury FiscalData API, Average Interest Rates on Treasury Securities (monthly, public domain)"}},"example":null,"exampleRequest":null,"tags":["x402"],"displayCostAmount":"0.005","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":"$0.005/call","primary":{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.005","per":"call","confidence":"exact"},"accepted":[{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.005","per":"call","confidence":"exact"}]},"paymentMethods":[{"uid":"pm_0Vsh0EbQXByW3G-bts4RM","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"0.005","costPer":"request","priority":0,"asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","unit":"request","depositMicros":null,"planRef":null}],"brandName":null,"brandSlug":null,"brandBaseUrl":null,"brandDocsUrl":null,"whatItDoes":"Returns monthly average interest rates the US Treasury pays on outstanding securities, sourced from the official FiscalData API, filterable by security type and date range.","exampleAgentPrompt":"Can you pull the monthly average interest rates the US Treasury has been paying on Treasury Bills since January 2024, up to the last 12 records?","exampleUseCases":null,"resultDescription":"A JSON array of records each containing record_date (ISO date), security type/name, and average interest rate in percent, sorted newest first, cached up to 24 hours.","failureModes":["Invalid security_desc value returns empty results (no matching records found)","since date in wrong format returns a 400 error","limit outside 1-100 range returns a 400 validation error","FiscalData upstream outage may cause 502/503 error","Payment of 0.005 USDC not completed returns 402 Payment Required"],"whenToPreferThis":"Use this endpoint when you need official US Treasury average interest rate data by security type (Bills, Notes, Bonds, etc.) on a monthly basis, sourced directly from the FiscalData API. Prefer it over scraping Treasury websites or using third-party rate aggregators when you need clean, normalized, cached JSON with filtering by security type and date.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-09-15T00:32:04.491Z","isFirstParty":false}