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Treasury Bills — Average Interest Rates on US Treasury Securities: 9 series, daily data from 2001 to 2026 (2,578 data points, unit: % p.a.). Source: U.S. Treasury, Bureau of the Fiscal Service (Fiscal Data) (Open data: copy, adapt, redistribute for non-commercial and commercial purposes). Free JSON or CSV over a REST API and MCP, no API key, updated automatically.
GET https://api.agentdatahub.de/api/v1/series/f.us-treasury-avg-interest-rates.bills?_from=2000&resample=A&format=csv
JSON: drop format=csv · Range: _from/_to (year, YYYY-MM or date) · Resample: resample=D|W|M|Q|A with agg=mean|last|min|max|sum · MCP: tool get_series with {"id":"f.us-treasury-avg-interest-rates.bills"}
| Series id | Title | From | To | Points |
|---|---|---|---|---|
f.us-treasury-avg-interest-rates.bills | Treasury Bills — Average Interest Rates on US Treasury Securities | 2001-01-31 | 2026-09-30 | 309 |
f.us-treasury-avg-interest-rates.bonds | Treasury Bonds — Average Interest Rates on US Treasury Securities | 2001-01-31 | 2026-09-30 | 309 |
f.us-treasury-avg-interest-rates.frn | Treasury Floating Rate Notes (FRN) — Average Interest Rates on US Treasury Securities | 2014-01-31 | 2026-09-30 | 153 |
f.us-treasury-avg-interest-rates.notes | Treasury Notes — Average Interest Rates on US Treasury Securities | 2001-01-31 | 2026-09-30 | 309 |
f.us-treasury-avg-interest-rates.savings-bonds | United States Savings Securities — Average Interest Rates on US Treasury Securities | 2001-01-31 | 2026-09-30 | 309 |
f.us-treasury-avg-interest-rates.tips | Treasury Inflation-Protected Securities (TIPS) — Average Interest Rates on US Treasury Securities | 2004-10-31 | 2026-09-30 | 264 |
f.us-treasury-avg-interest-rates.total | Total Interest-bearing Debt — Average Interest Rates on US Treasury Securities | 2001-01-31 | 2026-09-30 | 309 |
f.us-treasury-avg-interest-rates.total-marketable | Total Marketable — Average Interest Rates on US Treasury Securities | 2001-01-31 | 2026-09-30 | 307 |
f.us-treasury-avg-interest-rates.total-non-marketable | Total Non-marketable — Average Interest Rates on US Treasury Securities | 2001-01-31 | 2026-09-30 | 309 |
| Source | U.S. Treasury, Bureau of the Fiscal Service (Fiscal Data) |
| License | Open data: copy, adapt, redistribute for non-commercial and commercial purposes |
| Terms | https://fiscaldata.treasury.gov/about-us/ |
| Last update | 2026-10-29 15:22:37 UTC |