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US Treasury Average Interest Rates
x402
US Treasury Average Interest Rates is a paid API for AI agents from data.greeneris.io, paid per call via x402, $0.005/call, status unknown (last checked 2026-09-15).
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.
Price / call$0.005
Success—
StatusUnknown
How this service works
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.
Output
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.
Example use cases
Example prompt
“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?”
Technical details
Endpoint
GEThttps://data.greeneris.io/v1/us/treasury-ratesWhen to prefer
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.
Side effects
- 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
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Output
Schema · Response
{
"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)"
}
}Tags
x402
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