US Codex MCP Server: Install & Setup

Install US Codex in Claude Code

Claude Code

claude mcp add --transport http us-codex https://uscodex.org/mcp

mcp.json (Claude Desktop, Cursor, VS Code, Windsurf)

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

Frequently asked questions

What does the US Codex MCP server do?

Federal law: US Code, CFR, public laws, bills and executive orders, cross-linked and versioned.

Is the US Codex MCP server free?

The server is free, but you will likely need an account. The server itself is free, but it connects to a service that needs an account or API key, which may have paid tiers. Check the provider for current pricing.

Does US Codex run locally or remotely?

Remote. Hosted by the provider. You connect with a URL, nothing to install.

How do I add US Codex to Claude Code?

Run: claude mcp add --transport http us-codex https://uscodex.org/mcp

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