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US Treasury Average Interest Rates
x402
US Treasury Average Interest Rates is a paid API for AI agents from treasury-macro.x402tookit.com, paid per call via x402, $0.02/call, status unknown (last checked 2026-10-21).
Returns the average interest rate the US government pays on Treasury bills, notes, bonds, and TIPS, with year-over-year change.
Price / call$0.02
Success—
StatusUnknown
How this service works
Average interest rate the US government pays on Treasury bills, notes, bonds and TIPS, with change from a year ago.
Output
Returns a list of Treasury security types (T-bills, T-notes, T-bonds, TIPS, etc.) each with their current average interest rate percentage, the rate from a year ago, and the change in percentage points. Also includes the record date, the year-ago reference date, a summary verdict, data source URL, and attribution details.
Example use cases
Monitoring government borrowing cost trends
“What are the latest average interest rates the US Treasury is paying on its outstanding debt, broken down by security type, and how do they compare to a year ago?”
Fiscal cost analysis for economic report
“I'm writing a macro research note — can you pull the current average rates the US government pays on T-bills, T-notes, bonds, and TIPS, along with the year-over-year change in basis points?”
Alert when borrowing costs rise sharply
“Check the US Treasury's average interest rates across all security types and tell me if any of them have increased by more than 50 basis points compared to a year ago.”
Technical details
Endpoint
GEThttps://treasury-macro.x402tookit.com/us-avg-interest-rates?utm_source=zero.xyzWhen to prefer
Use this endpoint when you need the official US Treasury average interest rate across outstanding securities broken down by instrument type (bills, notes, bonds, TIPS), especially with year-over-year comparison. Prefer this over yield curve endpoints when you want the actual average rate paid on existing debt rather than current market yields on new issuances.
Side effects
- Treasury data source temporarily unavailable — degraded flag set to true with reasons listed
- Data not yet updated for current period — asOf date may lag by days or weeks
- Malformed request returns validation error
- Payment of 0.02 USDC not completed — 402 Payment Required response
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Tags
x402
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