FRTracker — Federal Regulatory Research
Source-linked US federal regulations: CFR provision history, obligations, rules, comments.
Connect it
Settings → Connectors → Add custom connector
URL: https://frtracker.app/mcpSettings → Apps & Connectors → Advanced → Developer mode
Create connector with URL: https://frtracker.app/mcp{
"mcpServers": {
"regulatory-research": {
"url": "https://frtracker.app/mcp"
}
}
}claude mcp add --transport http regulatory-research https://frtracker.app/mcp{
"servers": {
"regulatory-research": {
"type": "http",
"url": "https://frtracker.app/mcp"
}
}
}10 tools, verified live
lookup_provisionread-onlyLook 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.
get_provision_historyread-onlyDocumented 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.
rules_amendingread-onlyWhich 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.
recent_cfr_changesread-onlyMost recent detected changes to CFR text (title, part, name, dates), newest first. No API key required.
get_statsread-onlyAggregate corpus statistics: documents, obligations, pairs, agencies, coverage dates. No API key required.
search_regulationsread-onlyFull-text search over Federal Register documents and extracted obligations (FTS5/BM25). Totals are approximate (total_exact: false). Requires an API key.
list_rulesread-onlyList 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.
list_obligationsread-onlyList 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.
get_requirementread-onlyDetail for one extracted obligation by id, including its source rule and citation URL. Requires an API key.
get_rule_commentsread-onlyPublic comments for a Federal Register document (organization, title, date, body where available). Coverage is partial and stated in the response. Requires an API key.
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