VoteLog's underlying data is free to download and reuse. It is compiled from official public-domain US government sources: Congress.gov for legislation and votes, and the FEC for campaign finance. If you use it, please credit VoteLog (votelog.org) and link back so readers can check the methodology.
Each tracked bill also has an individual JSON record keyed by Congress and bill number at /data/bills/lookup/<congress>-<bill>.json, matching the bill's page URL (for example, /bills/118/hr6679 ↔ /data/bills/lookup/118-hr6679.json). The same record is also available at /data/bills/<id>.json, where <id> is VoteLog's internal numeric bill ID (the id field in the bulk exports). It contains the full record shown on the bill page: identifiers, title, sponsor, classification with any editor's note, status, actions, and the member-by-member vote breakdown.
The production site is a static snapshot, so these files update when the site is republished; each file reflects the same data the site itself displays. Classification labels follow the published methodology; excluded bills are listed separately on the excluded-bills audit trail and do not appear in these exports.