FRTracker — Federal Regulatory Research

• lookup_provision — Look up a CFR provision by citation (e.g. "21 CFR 1304.04") or by an exact quotation, optionally as of a past date. Returns the provision text with a ProvisionE
• get_provision_history — Documented change history for a CFR provision by canonical id (e.g. "21-cfr-1304.04(a)"): before/after text, computed redline, observed dates, and candidate fin
• rules_amending — Which final rules amend a CFR part or section, read from each rule's own amendatory instructions ("Amend § 52.2120 by..."). Returns the rules, the sections each
• recent_cfr_changes — Most recent detected changes to CFR text (title, part, name, dates), newest first. No API key required.
• get_stats — Aggregate corpus statistics: documents, obligations, pairs, agencies, coverage dates. No API key required.
• search_regulations — Full-text search over Federal Register documents and extracted obligations (FTS5/BM25). Totals are approximate (total_exact: false). Requires an API key.
• list_rules — List Federal Register documents with filters: agency slug, document type, rulemaking pathway (interim_final/temporary/direct_final = notice-and-comment bypass c
• list_obligations — List extracted regulatory obligations ("who must do what") with filters: agency, deontic class, free text. Obligations are machine-extracted with quality tiers;
• get_requirement — Detail for one extracted obligation by id, including its source rule and citation URL. Requires an API key.
• get_rule_comments — Public comments for a Federal Register document (organization, title, date, body where available). Coverage is partial and stated in the response. Requires an A

No long description beyond the summary.