API

The same dataset shown on this site is available as a live API on Apify — built for AI agents and tax or accounting tools that need a fast, cited answer instead of a page to parse.

What you get

Lookup by state + county or tribal area
Everything changed since a given date, for syncing
Every record includes its IRS source link, exact quoted text, and a last-verified date

View connection info on Apify →

Free data

The full underlying dataset is public domain IRS data, free to use, no API key required:

Download the full dataset (JSON) ↓