com.1102tools/ecfr-mcp

up checked 2026-11-11T08:38:05.367Z

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Publisher-provided title

eCFR

Publisher-provided description

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

Summary by lookupd

Lets an agent search, read, compare and track sections of the Code of Federal Regulations, including FAR and DFARS clauses.

Install

Claude Code, remote (streamable-http)

claude mcp add --transport http ecfr https://ecfr.1102tools.com/mcp

Claude Code, pypi package (stdio)

claude mcp add ecfr -- uvx ecfr-mcp

Codex, remote (streamable-http)

codex mcp add ecfr --url https://ecfr.1102tools.com/mcp

Codex, pypi package (stdio)

codex mcp add ecfr -- uvx ecfr-mcp

Cursor, remote (streamable-http) → .cursor/mcp.json

{
  "mcpServers": {
    "ecfr": {
      "url": "https://ecfr.1102tools.com/mcp"
    }
  }
}

Cursor, pypi package (stdio) → .cursor/mcp.json

{
  "mcpServers": {
    "ecfr": {
      "command": "uvx",
      "args": [
        "ecfr-mcp"
      ]
    }
  }
}

Other clients: docs. Or tell your agent: Set up lookupd for me: read https://lookupd.com/agent.md and follow it.

Tools (13 tools)

Publisher-provided text

• 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 para
• 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
• 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 f
• 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
• 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, n
• 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 identif
• get_corrections Get editorial corrections for a CFR title, newest first. Returns corrections with CFR references, corrective actions, error dates, and FR citations, so
• 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
• 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, sub
• 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
• 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 ap
• 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
• search_cfr Full-text search across the Code of Federal Regulations. Returns matching sections with excerpts, headings, scores, and hierarchy. current_only=True (

Details

• Version: 1.1.15
• Transports: streamable-http, stdio
• Uptime (7 days): 100%
• Median latency: 248 ms
• First indexed: 2026-11-01T08:52:32.898Z
• Last seen in registry: 2026-11-03T08:17:23.337Z
• Repository: https://github.com/1102tools-dev/federal-contracting-mcps
• Website: https://1102tools.com

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• Last crawl: 2026-11-11T16:39:06.253Z
• API base: https://api.lookupd.com
• MCP URL: https://api.lookupd.com/mcp