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US Treasury Par Yield Curve Rates
x402
US Treasury Par Yield Curve Rates is a paid API for AI agents from x402helper.xyz, paid per call via x402, $0.0195/call, status unknown (last checked 2026-10-31).
Returns US Treasury par yield curve rates for a specified calendar year, accessible via x402 USDC micropayment.
Price / call$0.0195
Success—
StatusUnknown
How this service works
X402 micropayments server — AI agents pay USDC for OFAC screening, rates, and billing verification.
Output
Returns a JSON object containing US Treasury par yield curve rates for the requested year (or current year by default), including yield values across various maturities. Response includes a success flag and a result object with the rate data.
Example use cases
Fixed income portfolio benchmarking
“Pull the US Treasury par yield curve rates for 2023 — I need the benchmark yields to compare against our corporate bond portfolio returns.”
Historical rate analysis for modeling
“Fetch the Treasury par yield curve data for 2020, I'm building a discounted cash flow model and need that year's risk-free rate benchmarks.”
Current yield curve for market research
“What are the current US Treasury par yield curve rates? I want to see where rates are sitting across maturities right now.”
Technical details
Endpoint
GEThttps://x402helper.xyz/89e509/treasury/rates?utm_source=zero.xyzWhen to prefer
Choose this endpoint when you need US Treasury par yield curve data and are operating in an x402-capable agent environment that can handle USDC micropayments. Suitable for financial modeling, fixed income benchmarking, or macro research workflows where programmatic access to government yield data is needed without a traditional API key subscription.
Side effects
- Year out of supported range (1990–2100) returns validation error
- Treasury data unavailable for requested year returns empty or error result
- Payment failure via x402 protocol blocks access to the endpoint
- Invalid query parameter type (non-integer year) causes request rejection
- Network timeout if Treasury data source is temporarily unavailable
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Output
Schema · Response
{
"type": "json",
"example": {
"result": {},
"success": true
}
}Tags
x402
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