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API Access

Access dataset files directly from scripts, code, or AI agents.

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Dataset Files

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.

/calcfi/calcfi-cpi/

├ README.md

https://datahub.io/calcfi/calcfi-cpi/_r/-/README.md

├ data.csv

https://datahub.io/calcfi/calcfi-cpi/_r/-/data.csv

└ datapackage.json

https://datahub.io/calcfi/calcfi-cpi/_r/-/datapackage.json

Key Files

Start with these files — they give you everything you need to understand and access the dataset.

datapackage.json— metadata & schema

https://datahub.io/calcfi/calcfi-cpi/_r/-/datapackage.json

README.md— documentation

https://datahub.io/calcfi/calcfi-cpi/_r/-/README.md

Typical Usage

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

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data

Field	Type	Format	Description
date	date	%Y-%m-%d	Observation date (YYYY-MM-DD).
value	number		Index value (base period varies; see source).
unit	string		Unit of observation (matches manifest).

Download

Download CSV

About

Last updated: 19 May 2026
Total rows: ...
Format: CSV
File size: 14.3 kB
Sources: Federal Reserve Economic Data (FRED); CalcFi live page
License: Creative Commons Attribution 4.0 International

About this dataset

Consumer Price Index (CPI)

Live, free, machine-readable economic data. Sourced from primary government datasets, updated on the published cadence.

Download

CSV: https://calcfi.app/api/rates/cpi?format=csv
JSON (latest value): https://calcfi.app/api/rates/cpi

Columns: date,value,source (one row per observation, sorted ascending by date).

Live page

Interactive chart + 10-year history + stats: https://calcfi.app/rates/history/cpi

Metadata

Field	Value
Slug	`cpi`
Category	inflation
Primary source	BLS via FRED (CPIAUCSL)
Update cadence	monthly
Last README sync	2026-06-04

License

CC-BY 4.0 — attribute to CalcFi with a link to https://calcfi.app/rates/history/cpi.

Why the CSV link points to calcfi.app

The previous data.csv link in this dataset's datahub.io storage was unreachable (404). CalcFi now serves the canonical CSV directly via its content-negotiated rates API, which reads from the same Supabase-cached pipeline that powers the live page above. The CSV is regenerated on every request from the most recent stored observations, so it stays in sync with the live page without a separate publishing step.