US Codex vs US Code of Federal Regulations

In-depth architectural comparison of the US Codex and US Code of Federal Regulations MCP servers. Compare execution transports, security boundaries, tool capabilities, quality scores, and ready-to-paste client installation snippets for Claude, Cursor, Windsurf, and VS Code.

Which MCP Server Should You Choose?

U

Choose US Codex when:

• You need dedicated capabilities in the Legal domain.
• You prefer remote streaming HTTP/SSE transport architecture.
• Your security boundary fits: No auth required (Free / Open Source).

Explore US Codex Details

Choose US Code of Federal Regulations when:

• You need dedicated capabilities in the Legal domain.
• You prefer local stdio subprocess transport architecture.
• Your security boundary fits: No auth required (Free / Open Source).

Explore US Code of Federal Regulations Details

Feature & Specification Comparison

Specification	U US Codex Legal	US Code of Federal Regulations Legal
Summary	Federal law: US Code, CFR, public laws, bills and executive orders, cross-linked and versioned.	Look up, search, and track changes to the US Code of Federal Regulations (eCFR).
Category & Scope	Legal	Legal
Quality signal

Tools & Capabilities Breakdown

Ready-to-Paste Client Configurations

Paste either (or both) of these JSON server blocks into your client config file (e.g. claude_desktop_config.json or ~/.cursor/mcp.json).

{
  "mcpServers": {
    "us-codex": {
      "url": "https://uscodex.org/mcp"
    }
  }
}

{
  "mcpServers": {
    "us-code-of-federal-regulations": {
      "command": "uvx",
      "args": [
        "cfr-mcp"
      ]
    }
  }
}

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