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US Treasury Auction Data API
x402
US Treasury Auction Data API is a paid API for AI agents from api.vextorium.com, paid per call via x402, $0.003/call, status unknown (last checked 2026-10-18).
Returns upcoming announced or recent completed US Treasury debt auctions (bills, notes, bonds, TIPS, FRNs) including term, offering amount, high yield, and bid-to-cover ratio from official Fiscal Data.
Price / call$0.003
Success—
StatusUnknown
How this service works
232 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 a list of auction records sourced from U.S. Treasury Fiscal Data. Each record includes the security type (bill/note/bond/TIPS/FRN), term (e.g. '4-Week'), CUSIP, maturity date, auction date, coupon percent (if applicable), awarded rate (high yield) in percent, bid-to-cover ratio, and offered amount in USD. Also includes a flag indicating whether results are upcoming or historical.
Example use cases
Monitor short-term rate trends
“Get me the 15 most recent Treasury bill auction results so I can see how the awarded yield has been trending over time.”
Check upcoming bond issuance calendar
“What Treasury bond and note auctions are announced and coming up soon? Show me the term and offering amount for each.”
Analyze TIPS auction demand
“Pull the last 10 TIPS auction results — I want to see the bid-to-cover ratios and high yields to gauge investor demand for inflation-protected securities.”
Technical details
Endpoint
POSThttps://api.vextorium.com/v1/us-treasury-auctions?utm_source=zero.xyzWhen to prefer
Choose this endpoint when you need structured, official US Treasury auction data (bills, notes, bonds, TIPS, or FRNs) sourced directly from Fiscal Data, including yield and demand metrics. Prefer it over scraping Treasury.gov or financial news APIs when you need machine-readable auction results with bid-to-cover and high yield in a single call. Ideal for fixed-income analysis, rate monitoring, and government debt market research.
Side effects
- Invalid security type enum value returns validation error
- Limit outside 1-100 range may be rejected or clamped
- No auctions found for a specific type in the requested window returns empty array
- Upstream Fiscal Data API unavailability causes service errors
- bodyType must be set to 'json' or form encoding errors occur
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| type | string | |
| limit | integer | 1-100 (default 15) |
| upcoming | boolean |
Output
Schema · Response
{
"type": "json",
"example": {
"source": "U.S. Treasury Fiscal Data (public domain)",
"auctions": [
{
"term": "4-Week",
"type": "Bill",
"cusip": "912797VP9",
"maturity": "2026-11-03",
"coupon_pct": null,
"auction_date": "2026-10-01",
"bid_to_cover": 2.83,
"awarded_rate_pct": 3.956,
"offered_amount_usd": 100000000000
},
{
"term": "8-Week",
"type": "Bill",
"cusip": "912797VZ7",
"maturity": "2026-12-01",
"coupon_pct": null,
"auction_date": "2026-10-01",
"bid_to_cover": 2.7,
"awarded_rate_pct": 4.071,
"offered_amount_usd": 95000000000
}
],
"upcoming": false
}
}Tags
x402
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