API Access
Access dataset files directly from scripts, code, or AI agents.
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API Access
Access dataset files directly from scripts, code, or AI agents.
Each file has a stable URL (r-link) that you can use directly in scripts, apps, or AI agents. These URLs are permanent and safe to hardcode.
Start with these files — they give you everything you need to understand and access the dataset.
- 1. Fetch datapackage.json to inspect schema and resources
- 2. Download data resources listed in datapackage.json
- 3. Read README.md for full context
Data Files
Explore with AIdata
| Field | Type | Format | Description |
|---|---|---|---|
| date | date | %Y-%m-%d | Observation date (YYYY-MM-DD). |
| value | number | Value as a percent (e.g. 6.36 means 6.36%). | |
| unit | string | Unit of observation (matches manifest). |
Download
Download CSVAbout
- Last updated
- 19 May 2026
- Total rows
- ...
- Format
- CSV
- File size
- 300 kB
About this dataset
10-Year Treasury Yield
Daily observations of 10-Year Treasury Yield (10yr Treasury).
At a glance
| Field | Value |
|---|---|
| Slug | 10-year-treasury |
| Category | mortgage-rates |
| Unit | percent |
| Cadence | daily |
| Source | U.S. Treasury via FRED (DGS10) |
| Source series ID | DGS10 |
| License | CC BY 4.0 |
Live data on CalcFi
- Latest value + chart: https://calcfi.app/rates/history/10-year-treasury
- JSON API (no auth): https://calcfi.app/api/rates/10-year-treasury
- CSV (this file, daily-refreshed via cron): data.csv
Quick start
# Latest single value from the API
curl https://calcfi.app/api/rates/10-year-treasury
# Full history from this repo
curl https://raw.githubusercontent.com/jerehere/calcfi-open-data/main/datasets/10-year-treasury/data.csv
import pandas as pd
url = "https://raw.githubusercontent.com/jerehere/calcfi-open-data/main/datasets/10-year-treasury/data.csv"
df = pd.read_csv(url, parse_dates=["date"])
print(df.tail())
Source + provenance
This dataset mirrors U.S. Treasury via FRED (DGS10) (DGS10).
Primary source: Federal Reserve Economic Data (FRED).
Values are pulled daily by a GitHub Actions workflow (.github/workflows/refresh.yml) from CalcFi's read-only data API, which itself pulls from primary sources. No transformations or imputations are applied; values are passed through verbatim.
Citation
If you use this dataset, please cite:
CalcFi (2026). 10-Year Treasury Yield dataset. https://calcfi.app/rates/history/10-year-treasury
License
CC BY 4.0 — attribution requested. The data itself is sourced from Federal Reserve Economic Data (FRED); consult their terms for any additional restrictions.