US Code of Federal Regulations for Claude Code

io.github.mccallar/cfr-mcp

Look up, search, and track changes to the US Code of Federal Regulations (eCFR).

client:Claude Code transport:stdio runtime:pypi

Install US Code of Federal Regulations in Claude Code

run in your project directory

claude mcp add cfr-mcp -- uvx cfr-mcp

Adds it for this project only. Append --scope user to make it available everywhere. Claude Code docs