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Mercury402 Treasury Yield Curve Historical Data
x402
Mercury402 Treasury Yield Curve Historical Data is a paid API for AI agents from api.mercury402.com, paid per call via x402, $0.05/call, status unknown (last checked 2026-09-15).
Returns historical U.S. Treasury yield curve data for a specified date range
Price / call$0.05
Success—
StatusUnknown
How this service works
76 live pay-per-call financial data APIs for AI agents. Treasury, FRED, forex, spreads, breakeven inflation, macro bundles, and composite dashboards. USDC on Base.
Output
A JSON object containing an array of historical yield curve data points indexed by date, along with the start_date and end_date boundaries of the requested range. Each record in the data array represents daily or periodic Treasury yields across maturities for the specified period.
Example use cases
Yield curve inversion research
“Get me the historical Treasury yield curve data from January 2022 through December 2023 so I can see when and how deeply the curve inverted during that Fed tightening cycle.”
Fixed income portfolio backtesting
“I need historical yield curve data from January 2020 to December 2020 to backtest how my bond portfolio would have performed during the COVID shock — can you pull that from Mercury402?”
Macro regime analysis report
“Pull the Treasury yield curve history from July 1, 2023 through June 30, 2024 so I can analyze how the macro rate environment evolved over that twelve-month period.”
Technical details
Endpoint
POSThttps://api.mercury402.com/v1/treasury/yield-curve/historicalWhen to prefer
Choose this endpoint when you need historical U.S. Treasury yield curve time series for a specific date range — ideal for backtesting, macro research, or analyzing rate regimes. Prefer it over generic financial data APIs when you need pay-per-call access without a subscription, and when you need it integrated with USDC micropayments on Base.
Side effects
- Invalid or missing date parameters return an empty data array
- Date range too large may result in timeout or truncated results
- Future dates or unsupported date formats may return errors
- USDC payment failure on Base network blocks the call
- Dates outside available historical data range return empty results
Output
Schema · Response
{
"type": "json",
"example": {
"data": [],
"end_date": "2024-03-31",
"start_date": "2024-01-01"
}
}Tags
x402
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