Add US Codex MCP Connector (United States Code)

[SebRollen]

Connector Submission: US Codex (United States Code)

This PR adds the US Codex MCP connector to the default configuration of the relevant claude-for-legal plugins and registers it in CONNECTORS.md.

1. Connector Overview

Field	Value
Connector Name	US Codex
Provider	US Codex (OLRC USLM Edition)
URL	https://uscodex.org/mcp
Transport	Streamable HTTP (https://uscodex.org/mcp) & Server-Sent Events (https://uscodex.org/mcp/sse)
Authentication	Unauthenticated (Public domain federal statutes; zero API keys or authentication required)
Rate Limits	Session-isolated: 120 req/min per session (2,000 req/min IP ceiling) with idempotent tool response caching
Data Source	Office of the Law Revision Counsel (OLRC) official USLM XML database (all 54 titles, 2013–present)
Interactive Docs	https://uscodex.org/mcp

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2. Practice Areas & Plugin Relevance

The United States Code provides primary federal statutory foundation across practice areas in the suite:

• commercial-legal: Title 11 (Bankruptcy Code), Title 9 (Arbitration), Title 15 (Commerce & Trade)
• corporate-legal: Title 15 (Securities Act of 1933, Exchange Act of 1934, Sarbanes-Oxley), Title 26 (Internal Revenue Code)
• litigation-legal: Title 28 (Judiciary & Judicial Procedure), Federal Rules of Civil/Appellate/Criminal Procedure, Title 42 (§ 1983)
• ip-legal: Title 17 (Copyright Act), Title 35 (Patent Act), Title 15 (Lanham Act, Defend Trade Secrets Act)
• employment-legal: Title 29 (FLSA, OSHA, ERISA, FMLA), Title 42 (Title VII, ADA, ADEA)
• privacy-legal: Title 5 (Privacy Act, FOIA), Title 15 (FTC Act § 5, COPPA, GLBA), Title 18 (ECPA, CFAA), Title 47 (TCPA)
• regulatory-legal & ai-governance-legal: Title 5 (Administrative Procedure Act), agency statutory enabling acts
• product-legal: Consumer protection statutes, FTC authority, trade regulation
• law-student & legal-clinic: Primary statutory research, citation verification, citator backlinks, and pro se guidance

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3. Tool Reference (7 Read-Only Tools)

1. usc_search: Search the full text of the US Code across all 54 titles or scoped by title/chapter.
2. usc_fetch_section: Retrieve authoritative statutory text and metadata for a section or specific subdivision anchor (e.g. § 507(a)(1)).
3. usc_lookup_citation: Parse and resolve standard legal citations (e.g., "11 U.S.C. § 507(a)(1)", "26 USC 501(c)(3)", "Fed. R. Civ. P. 12(b)(6)").
4. usc_get_citations: Statutory citator retrieving all provisions across the US Code that cite a given section (statutory backlinks).
5. usc_diff_sections: Legislative comparison between historical OLRC release points from 2013 to present.
6. usc_list_titles: List all 54 titles with positive law status under 1 U.S.C. § 204 and section counts.
7. usc_list_releases: List historical OLRC release points with Public Law coverage.

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4. Compliance with CONNECTORS.md

• Remote MCP server over HTTPS (https://uscodex.org/mcp)
• Unauthenticated Access: Frictionless access to public domain federal statutory data without API keys.
• Read-Heavy Tools: All tools are strictly read-only queries.
• Provenance in Results: Every tool embeds source (OLRC USLM XML), release point, Bluebook-ready citation, positive law status under 1 U.S.C. § 204, ISO 8601 retrieval timestamp, and canonical link.
• No Instruction-Like Content: Statute texts and notes are returned strictly as data payloads with frontmatter metadata.
• Graceful Error Handling & Rate Limits: Session-isolated rate limits, standard JSON-RPC 2.0 error codes (-32700, -32601, -32602, -32603), and 429 with Retry-After.

[github-actions]

All contributors have signed the CLA ✍️ ✅
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[SebRollen]

I have read the CLA Document and I hereby sign the CLA