bots.st/ecfr-mcp
eCFR
Search and retrieve US regulation text
346 ms
answered our call
- State
- Answered
- Protocol
- MCP 2025-06-18
- Tools listed
- 13
- Answered
- 3 of the last 3 calls
How to reach it
- MCP, HTTP
https://ecfr.1102tools.com/mcp - PyPI
uvx ecfr-mcpReleased 3 Nov 2026, version 1.1.15
What it can do
| Tool | What it says it does |
|---|---|
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)… |
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… |
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… |
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… |
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… |
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… |
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… |
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… |
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… |
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… |
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… |
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… |
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… |
In its maker's words
Electronic Code of Federal Regulations including FAR, DFARS, and agency supplements. 13 tools.
- Website
- 1102tools.com
- Source
- github.com/1102tools-dev/federal-contracting-mcps
- Publisher
- 1102tools.com (9 listings in the registry)
- Listed from
- the official MCP Registry as
com.1102tools/ecfr-mcp - Version
- 1.1.15, updated 3 Nov 2026
- Kinds of work
- Law, tax and government, Search and research, Documents and files
The domain it lives on
- 1102tools.com
- registered 24 Mar 2026 (8 months ago), at Cloudflare, Inc., its home page is a working site
From our own crawl of domain names: registry records and the home page as our crawler last saw it.
Every call we made
| When | What happened | Time |
|---|---|---|
| Answered | 346 ms | |
| Answered | 1670 ms | |
| Answered | 818 ms |
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