FRTracker — Federal Regulatory Research
Source-linked US federal regulations: CFR provision history, obligations, rules, comments.
| Endpoint | https://frtracker.app/mcp (streamable-http) |
|---|---|
| Registry version | 1.0.0 |
| Now | 10 tools · grade B (87) · pin ts_36426cc64c357993ec7c8ebfeae25445 · protocol 2025-03-26 |
| First / last listed | 2026-10-25 08:16 UTC / 2026-10-25 08:16 UTC |
| Grade over time | 2026-10-25: B (87), 10 tools |
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Tools: lookup_provision get_provision_history rules_amending recent_cfr_changes get_stats search_regulations list_rules list_obligations get_requirement get_rule_comments
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 ProvisionEvidence object (source, snapshot date, hashes). Explicitly reports ambiguity or no-match instead of guessing. Requires a free API key. params: q*, as_of |
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 final rules. 404 when the provision is not in the documented-change set — absence of a documented change is not a claim that nothing changed. No API key required. params: canonical_id* |
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 addresses, and dates. This reports what a rule SAYS it amends — it is not an attribution of any observed text change to that rule. Covers 2020-present; absence means not indexed, not that no rule amended it. No API key required. params: title*, part*, section, limit |
recent_cfr_changes | Most recent detected changes to CFR text (title, part, name, dates), newest first. No API key required. params: limit |
get_stats | Aggregate corpus statistics: documents, obligations, pairs, agencies, coverage dates. No API key required. params: none |
search_regulations | Full-text search over Federal Register documents and extracted obligations (FTS5/BM25). Totals are approximate (total_exact: false). Requires an API key. params: q*, tab, limit, page |
list_rules | List Federal Register documents with filters: agency slug, document type, rulemaking pathway (interim_final/temporary/direct_final = notice-and-comment bypass classes), or docket id. Requires an API key. params: agency, type, pathway, docket, limit, page |
list_obligations | List extracted regulatory obligations ("who must do what") with filters: agency, deontic class, free text. Obligations are machine-extracted with quality tiers; they are not legal advice. Requires an API key. params: agency, deontic, q, limit, page |
get_requirement | Detail for one extracted obligation by id, including its source rule and citation URL. Requires an API key. params: id* |
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 API key. params: doc*, offset |
Entries describe changes in tool definitions. They are not statements about a server, its quality or its author. The grade measures how the tool definitions fit model providers (token cost, schema compatibility, confusable names) as scored by the ToolFit engine at the time of the listing. JSON: append .json. Opt-out: how or hello@youraitools.co.