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Read-only search and retrieval for U.S. Code of Federal Regulations, with `search_regulations`, `get_regulation`, and `list_titles`; returned text includes legal citation links, source dates, stale-data flags, and paginated full text. Hosted Streamable HTTP at `https://ecfr.io/mcp` (no auth); local TypeScript stdio via `npm ci && npm run build && node dist/stdio.js`. MIT. Official MCP Registry id `io.ecfr/ecfr`. Independent mirror of an unofficial editorial compilation, not the official legal edition.

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