US Treasury Rates: Yield Curve, T-Bill Rates & National Debt

Get official U.S. Treasury interest rate data in clean rows: the daily par yield curve (1-month to 30-year), the real yield curve (TIPS), daily T-bill rates, long-term rates, the monthly average interest rates on Treasury securities, and the daily Debt to the Penny (total public debt outstanding). Data comes straight from home.treasury.gov and the Treasury Fiscal Data API. You can pick any date range back to 1990. No login, no API key.

Who is it for?

• Analysts, traders and fintech apps that need yield curves for models, dashboards and spreads (2s10s, 3m10y).
• Treasury and finance teams benchmarking borrowing costs and discount rates.
• Economists, journalists and students tracking inversions, rate cycles and the national debt.
• Spreadsheet and BI users who want a scheduled, ready-to-use feed in CSV, Excel or JSON.

How to use it

1. Choose one or more datasets (the default is the nominal par yield curve).
2. Set Last N days, or a start and end date.
3. Choose wide output (one row per date with a column per tenor) or long output (one row per date and tenor, easy for charts and SQL).
4. Click Start, then export the results or schedule the tool to run every day.

Input example

{"datasets": ["yield-curve", "bill-rates"], "startDate": "2026-01-01", "outputFormat": "wide"}

Output example

{"dataset": "yield-curve", "date": "2026-10-23", "1m": 4.02, "3m": 3.95, "6m": 3.81, "1y": 3.62, "2y": 3.49, "5y": 3.61, "10y": 4.01, "30y": 4.58}

How much does it cost?

Pay-per-event: a small fee per row returned, plus a tiny per-run start fee. There is no subscription and no separate platform usage cost. For example, 1,000 daily rows cost about $0.30. Searches with no matches and error rows are not charged. Set Last N days or Maximum cost per run to cap your spending.

Use it through the API, integrations or AI agents

Run it from the Apify API, on a schedule, or connect it to Make, Zapier, n8n or Google Sheets. AI agents can find and call it through the Apify MCP server. Output is clean JSON with the same fields on every run.

FAQ

Is it legal? Yes. Treasury rate data and Fiscal Data datasets are published by the U.S. Department of the Treasury for public use. They are U.S. government works in the public domain. No personal data is involved.

How fresh is the data? Daily rates are usually published by Treasury at the end of each business day. Average interest rates are monthly, and Debt to the Penny is daily with a one-business-day lag.

What is the difference between wide and long? Wide gives one row per date, with tenors as columns. Long gives one row per date and tenor, with tenor and rate fields.

Why are some tenors empty on older dates? Treasury added some maturities later (for example the 4-month bill and the 1.5-month bill), so older rows leave those columns empty.

Is this investment advice? No. It is official reference data only.

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