eCFR API

interface use

JSON/XML current/point-in-time CFR

critical rule

track title/part/section/amendment/effective date and legal-status notice

official source

API

Official sources

• API https://www.ecfr.gov/developers/documentation/api/v1

Catalogued at the 2026-09-01 research baseline. Verify the licence, free-tier limits, API schema and source terms again before deployment, and record a version-pinned registry entry for whatever you select.

Source: file 08 · 5-regulatory-compliance-monitoring · line 78