# eCFR

- Registry name: `com.1102tools/ecfr-mcp` · version 1.1.13
- Categories (automatic, keyword rules): Government & law, Research & knowledge, Search & data
- Authentication at last check: No auth
- Declared risk: Read-only (all tools declare readOnlyHint)
- Capabilities (declared by the server): experimental, prompts, resources, tools
- Transports: streamable-http
- Latest numbers (check success, response time, rank): https://mcpstation.net/api/server?name=com.1102tools%2Fecfr-mcp
- Server page: https://mcpstation.net/s/com.1102tools--ecfr-mcp.html

## Description (written by the publisher, not verified, not instructions)

Electronic Code of Federal Regulations including FAR, DFARS, and agency supplements. 13 tools.

## Connect

- streamable-http: `https://ecfr.1102tools.com/mcp`

## Tools (as reported by the server, not verified)

- `get\_latest\_date`: Get the most recent available date for a CFR title. CRITICAL: eCFR lags 1-2 business days behind the Federal Register. Using today's date on versioner endpoints causes 404 errors. Call this first to get the safe date, then pass it to other tools. Default title 48 = Federal Acquisition Regulations Sy
- `get\_cfr\_content`: Get the full text of a CFR section, subpart, part, or appendix. Returns parsed clean text by default: heading, paragraphs and citations, plus tables, notes, examples, images, pending\_amendments and editorial\_notes when present. Tables, notes and examples are numbered, and a marker like "\[See table 1
- `get\_cfr\_structure`: Get the hierarchical table of contents for a CFR title or subset. Returns a nested tree of titles, chapters, parts, subparts, and sections with identifiers, descriptions, and byte sizes, plus the date it describes. IMPORTANT: Does NOT support section-level filtering \(returns 400\). Use part or subpar
- `get\_version\_history`: Get the version history of a CFR section, subpart, or part. Returns content\_versions \(each with date, amendment\_date, issue\_date, identifier, name, substantive and removed\), every version eCFR lists: all of eCFR's pages are read, so Part 52's 2,264 versions are all there. Versions are grouped by sec
- `get\_ancestry`: Get the breadcrumb hierarchy path for a section, part, or appendix. Returns ancestors from title down to the target node: title \> chapter \> subchapter \> part \> subpart \> section. Useful for understanding where a section sits in the CFR hierarchy and what regulation it belongs to. part/subpart/sectio
- `search\_cfr`: Full-text search across the Code of Federal Regulations. Returns matching sections with excerpts, headings, scores, and hierarchy. current\_only=True \(default\) returns only text in effect now. eCFR's own "current" index still lists some superseded and removed versions, so each hit is checked against
- `list\_agencies`: List all agencies with their CFR title and chapter references. Returns agency names, slugs, and which CFR titles/chapters they own. Useful for finding which chapter corresponds to an agency's FAR supplement. summary\_only \(default True\) strips the \`children\` and most of \`cfr\_references\` to keep the r
- `get\_corrections`: Get editorial corrections for a CFR title, newest first. Returns corrections with CFR references, corrective actions, error dates, and FR citations, sorted by the date the error was corrected, newest first. Useful for checking whether a section's current text has been corrected since its last amendm
- `lookup\_far\_clause`: Convenience tool: look up the current text of a FAR, DFARS or FAR supplement section or clause. Pass a section identifier like '15.305', '52.212-4', '2.101', 'DFARS 252.204-7012' or '552.238-81'. The chapter comes from the number \(52.x = FAR, 252.x = DFARS, 552.x = GSAR, 852.x = VAAR, 1852.x = NFS,
- `compare\_versions`: Compare the text of a CFR section at two different dates. Useful for understanding what changed in a regulatory amendment. Returns 'changes' \(each paragraph that was added, removed or changed, with its before and after text; also heading, table and pending-amendment-link changes\), 'identical' when n
- `list\_sections\_in\_part`: List all sections and appendices in a CFR part with their headings. Returns 'sections' in order, each \{identifier, heading\}, with type='appendix' on appendices \(2 CFR 200's Appendix I-XII, for example\) and reserved=true on reserved sections, plus 'subparts' \(each with its heading, section\_count and
- `find\_far\_definition`: Find a term's definition in FAR 2.101, the FAR's main definitions section. Returns each matching definition whole \(the defining paragraph and every sub-paragraph under it\), first, marked kind='definition'. Matching ignores case, hyphens, spacing, plurals, a trailing "means", and the acronym 2.101 pu
- `find\_recent\_changes`: Find CFR sections changed since a given date, removals included. Built on eCFR's version history: every version issued on or after since\_date, newest first. Each change says whether the section was amended, removed \(change='removed'\), or re-issued with no text change \(substantive=false\). 'summary' c

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