Membership: the machine-readable dataset and change log
The calculator, the standards pages and the guides are free. The membership adds two downloads for signed-in members for $39 a month, renewing monthly until you cancel.
- Download the full dataset (JSON): every construction row, the eCFR dates, the validation record and the footnote text.
- Download the change log (JSON): dated entries recorded when a figure, a row or the eCFR amendment date changed between successful checks. The first entry is the baseline.
Downloads require a signed-in account with an active subscription. Signed-out visitors are asked to sign in first. Your access stays active for as long as the subscription is paid; if you cancel, access continues until the end of the period you have already paid for and then ends. The change log begins at the date this service started collecting snapshots and is not a history back to 2016.