us-eli-mcp

MCP server for US law with verifiable citations. Five sources behind ten read-only tools:

• Congress.gov API - the federal legislative process: bills as they move through committees and floor votes.
• GovInfo API - enacted law text as published packages: US Code, Statutes at Large, CFR annual editions, Federal Register issues.
• Federal Register API - full-text search over 1,003,504 FR documents (1994-2026, live-verified 2026-07-07), including 8,513 presidential documents (1,550 executive orders). Keyless.
• CourtListener search API - full-text search over 8,294,123 court opinions (live-verified 2026-07-07). The headline value is STATE case law (California, New York, Texas, ...), which no federal source covers. Keyless, ~5 requests/min anonymous.
• eCFR API - the CURRENT Code of Federal Regulations: section-level full-text search over 412,846 sections plus per-section amendment history. Keyless.

What this is not

• State legislation (all 50 states) - see LegiScan, a free-tier aggregator (30,000 queries/month) not wrapped here.
• A federal case-law workhorse - for heavy federal case-law research the mature MIT-licensed wrappers (blakeox/courtlistener-mcp, john-walkoe/courtlistener_citations_mcp) remain the recommendation; the case-law tools here exist primarily for state courts. See SOURCES.md.

Tools

Every response carries lex_uri (a resolvable API URL), human_readable_citation (the official convention: "H.R. 1, 118th Congress", "91 FR 41591", "People v. Miranda-Guerrero, 519 P.3d 1004 (California Supreme Court 2022)", "15 CFR § 744.3") and source_url (the public page). Reporter citations are taken verbatim from the source and never fabricated; when none exists the docket number is used instead.

Install

pip install us-eli-mcp

Windows 11 ze Smart App Control

Smart App Control blokuje niepodpisane pliki wykonywalne, a uvx.exe, pip.exe i generowany przy instalacji us-eli-mcp.exe podpisane nie sa. python.exe z python.org jest podpisany przez Python Software Foundation, wiec uruchomienie przez modul omija blokade:

python -m pip install us-eli-mcp
python -m us_eli_mcp

{ "mcpServers": { "us-eli-mcp": { "command": "python", "args": ["-m", "us_eli_mcp"] } } }

Nie wylaczaj Smart App Control, zeby to obejsc - wylaczenia nie da sie cofnac bez ponownej instalacji systemu.

Configuration

The Federal Register, CourtListener and eCFR tools need no key at all.

License

Apache-2.0 (code). Congress.gov, GovInfo, Federal Register and eCFR data are US government works (public domain). CourtListener data is provided by the Free Law Project.