{
  "x402Version": 2,
  "id": 3960,
  "slug": "3960",
  "resource": "https://data.greeneris.io/v1/us/treasury-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.",
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          "queryParams": {
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            "security": "Treasury Bills"
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            "rates": [
              {
                "avg_interest_rate_pct": 3.706,
                "record_date": "2026-06-30",
                "security": "Treasury Bills",
                "security_type": "Marketable"
              },
              {
                "avg_interest_rate_pct": 3.741,
                "record_date": "2026-05-31",
                "security": "Treasury Bills",
                "security_type": "Marketable"
              }
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            "source": "US Treasury FiscalData API, Average Interest Rates on Treasury Securities (monthly, public domain)"
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                    "type": "integer"
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                  "security": {
                    "description": "Exact security_desc filter, e.g. Treasury Bills",
                    "type": "string"
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                  "since": {
                    "description": "Only records with record_date >= this ISO date",
                    "type": "string"
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  "lastUpdated": "2026-08-27T15:12:59.624Z",
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    "submitted_at": "2026-09-18T22:00:31.484Z"
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}