Built this as a side effect of working on a tariff monitoring tool. The underlying data is all public government information but it's scattered across 8 different sources and not in any usable format.

Repo has Treasury collections going back to 2021 (the +308% YoY spike is real and alarming), all 178 active Section 301 exclusions with HTS codes and expiry dates, current tariff rates by country, and recent Federal Register notices. Updates every 6 hours automatically.