CalcFi Open Data

34 free, CC BY 4.0 financial and macroeconomic time series mirrored from primary sources. Permanent DOIs. Live API. Six mirror surfaces.

What this is

A primary-source mirror of 34 financial and macro time series — mortgage rates, Treasury yields, Federal Funds, CPI, PCE, hourly earnings, unemployment, oil, gas, FX, GDP, deposit rates, and more. Every series is cited verbatim to the underlying primary source (FRED, BLS, Freddie Mac, US Treasury, BEA, World Bank). No smoothing, no imputation, no proprietary adjustments.

Built as the data layer behind the free personal-finance calculators at calcfi.app. Released as open data because the underlying primary sources are already public — wrapping them in a CC BY 4.0 license with a permanent DOI just makes them easier to cite and harder to break.

Quick start

Load any series directly from the Hugging Face mirror — example for the 30-year fixed mortgage rate:

https://huggingface.co/datasets/iizy/resolve/main/datasets/30-year-fixed/data.csv

Each CSV is prefixed with comment lines (# Source: ..., # License: ..., # Retrieved: ...) carrying provenance. The actual header is date,value,unit. In pandas: pd.read_csv(url, comment='#').

Visualisations

Three interactive Observable notebooks built on this dataset:

Ten interactive Hugging Face Spaces (Gradio) build on the same data:

Three Cloudflare Pages mini-trackers (live FRED/BLS data):

Six CodePen calculator demos (vanilla HTML/CSS/JS, MIT) — view all in one collection:

License

All data CC BY 4.0 — free for any purpose with attribution to CalcFi and the named primary source. Notebook code and example scripts CC0 1.0.

Maintainer

Jere Salmisto (ORCID 0009-0000-0916-8684). Founder of calcfi.app. Reach out via the about page.