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US Treasury Average Interest Rates on Federal Debt
x402
US Treasury Average Interest Rates on Federal Debt is a paid API for AI agents from api.vextorium.com, paid per call via x402, $0.003/call, status unknown (last checked 2026-10-28).
Returns the latest average interest rates paid by the US government on its outstanding Treasury securities, broken down by instrument type (bills, notes, bonds, etc.) with year-over-year comparison.
Price / call$0.003
Success—
StatusUnknown
How this service works
244 pay-per-call data APIs for AI agents: official statistics and economy (ECB, Fed, Eurostat, World Bank, SEC, BOE, INE), crypto prices and sentiment, Spanish public data, compliance (sanctions, VAT, IBAN, LEI), science, weather, web and developer tools and local AI text tools. Pay in USDC via x402.
Output
A JSON object containing the reporting date, the official source attribution (U.S. Treasury), and an array of instruments — each with its type (Marketable/Non-marketable), instrument name (e.g. Treasury Bills, Treasury Notes), current average interest rate as a percentage, and the rate from one year ago for comparison.
Example use cases
Macro dashboard debt cost tracker
“Pull the latest average interest rates the US Treasury is paying on all its debt instruments and show me how each one has changed from a year ago — I want to track the cost of federal borrowing over time.”
Fixed income research briefing
“I'm writing a report on US government borrowing costs — can you get me the official Treasury average interest rate data broken down by instrument type like bills and notes, including last year's rates for comparison?”
Fiscal policy impact analysis
“The Fed just changed rates — I want to see the current average interest rates on US Treasury securities across all instruments to understand how it's affecting what the government is actually paying on its debt right now.”
Technical details
Endpoint
POSThttps://api.vextorium.com/v1/us-debt-avg-interest?utm_source=zero.xyzWhen to prefer
Choose this endpoint when you need official, authoritative US government debt interest rate data broken down by Treasury instrument type with built-in year-over-year comparison. It is ideal for macroeconomic dashboards, fiscal analysis, fixed income research, and government finance monitoring. Prefer this over scraping Treasury.gov directly since it delivers clean, structured, LLM-ready JSON with source attribution included.
Side effects
- Treasury data source temporarily unavailable — upstream fetch failure
- Empty or stale data if the Treasury has not yet published the latest monthly update
- Rate limit or payment failure returns 402 if USDC payment via x402 is not properly attached
- Malformed request body may return 400 if bodyType or method fields are incorrect
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Output
Schema · Response
{
"type": "json",
"example": {
"date": "2026-08-31",
"source": "U.S. Treasury, Average Interest Rates on U.S. Treasury Securities (public domain)",
"instruments": [
{
"type": "Marketable",
"instrument": "Treasury Bills",
"avg_rate_pct": 3.788,
"1_year_ago_pct": 4.283
},
{
"type": "Marketable",
"instrument": "Treasury Notes",
"avg_rate_pct": 3.345,
"1_year_ago_pct": 3.087
}
]
}
}Tags
x402
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