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US Treasury Yield Curve — Constant-Maturity Yields
x402
US Treasury Yield Curve — Constant-Maturity Yields is a paid API for AI agents from marketdata.use.x402atlas.com, paid per call via x402, $0.015/call, status unknown (last checked 2026-10-12).
Returns daily US Treasury constant-maturity yields across the full curve from 1-month to 30-year, with historical date range filtering.
Price / call$0.015
Success—
StatusUnknown
How this service works
US Treasury yield curve — constant-maturity market yields from 1-month to 30-year, daily history.
Output
Returns daily observations of US Treasury constant-maturity yields across all standard maturities (1-month, 3-month, 6-month, 1-year, 2-year, 3-year, 5-year, 7-year, 10-year, 20-year, 30-year), with observation dates and rate values in percentage terms. Supports filtering by exact date or date range, and pagination via limit parameter.
Example use cases
Example prompt
“Pull the US Treasury constant-maturity yield curve for every trading day from January 1 to March 31, 2025 — I need all maturities from 1-month to 30-year.”
Technical details
Endpoint
GEThttps://marketdata.use.x402atlas.com/treasury-yields?utm_source=zero.xyzWhen to prefer
Use this endpoint when you need official US Treasury constant-maturity benchmark yields — the risk-free rate curve used in bond pricing, spread analysis, duration modeling, or macro research. Prefer this over inflation or CPI endpoints when the specific need is nominal interest rates or yield curve shape (normal/inverted/flat). Best for daily granularity with historical depth; not for intraday rate movements.
Side effects
- Date out of range — no Treasury data available before Fed series start date
- Invalid date format — must be YYYY-MM-DD
- No data for requested date — weekend or holiday with no observation
- Limit exceeded or zero results returned for narrow date range
- Payment failure — x402 micropayment of $0.015 USDC not processed
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Output
Schema · Response
{
"type": "json",
"example": {
"count": 1,
"series": "treasury-yields",
"queried_at": "2026-07-06T12:00:00Z",
"observations": [
{
"date": "2025-06-01",
"yield_2_year": 3.9,
"yield_10_year": 4.2,
"yield_30_year": 4.5
}
]
}
}Tags
x402
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