Pricing

Pay per usage

US Treasury Interest Rate Tracker

Track the average monthly interest rate the US Treasury pays across a security category (Treasury Bills, Notes, Bonds, TIPS, and more), with year-over-year comparison, via the official US Treasury Fiscal Data API.

Pricing

Pay per usage

Rating

0.0

(0)

Developer

Timothy Kelvin

Actor stats

Bookmarked

Total users

Monthly active users

4 days ago

Last modified

Input

{
  "securityKeyword": "Treasury Bills",
  "monthsBack": 12,
  "maxResults": 50
}

Field	Type	Description
`securityKeyword`	string	Case-insensitive match against the security description, e.g. `"Treasury Bills"`, `"Treasury Notes"`, `"Treasury Bonds"`, `"TIPS"`, `"Total Interest-bearing Debt"`. Leave blank to return all categories. Default `"Treasury Bills"`.
`monthsBack`	number	How many months of history to fetch, by record date. Data is published monthly. Default `12`, max `60`.
`maxResults`	number	Maximum number of monthly records to return, most recent first. Default `50`, max `200`.

Output

One record per security category per month:

{
  "date": "2026-07-31",
  "securityType": "Marketable",
  "securityDescription": "Treasury Bills",
  "avgInterestRatePercent": 3.758,
  "yearOverYearChangePercentagePoints": -0.612
}

How it works

Direct calls to the official Treasury Fiscal Data API (api.fiscaldata.treasury.gov) — no proxy, no key, no scraping. Same platform and mechanism as this portfolio's US National Debt Tracker, applied to a different dataset.

Pricing note

Billed per search (one run), not per record returned.

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