Federal Register MCP

What is Federal Register MCP?

A Model Context Protocol server that wraps the FederalRegister.gov REST API as deterministic tool calls. It provides 8 tools for searching and retrieving Federal Register documents from 1994 to today, targeting federal acquisition policy teams, regulatory analysts, attorneys, and anyone who tracks rulemaking, FAR cases, comment periods, or executive orders. Public data; no API key required.

How to use Federal Register MCP?

Install via uvx federal-register-mcp (or pip install federal-register-mcp) and add the server configuration to your MCP‑compatible client’s settings. Example JSON config: {"mcpServers":{"federal-register":{"command":"uvx","args":["--refresh-package","federal-register-mcp","--from","federal-register-mcp","federal-register-mcp"]}}}. Supports Claude Desktop, Codex (ChatGPT), Gemini CLI, Copilot, Claude Code, Cursor, Cline, Zed, Continue, and other MCP clients.

Key features of Federal Register MCP?

• search_documents – full-text search with Boolean operators, filters by agency, CFR part, RIN, docket, date, document type
• get_document and get_documents_batch – retrieve full text and metadata for one or many document numbers
• open_comment_periods – list all currently open comment periods, sorted by closing date, filterable by agency or CFR part
• get_public_inspection – view documents posted to public inspection before official publication
• far_case_history – track a FAR case through ANPRM → NPRM → Final Rule → Corrections
• list_agencies and get_facet_counts – discover agencies and aggregate document counts by agency, CFR part, or document type

Use cases of Federal Register MCP?

• Track the FAR Council’s rulemaking pipeline from ANPRM through Final Rule
• Monitor comment periods affecting ongoing or planned acquisitions
• Build regulatory change reports for executive briefings or policy memos
• Cross-reference Federal Register notices with current eCFR text (pair with the eCFR MCP)
• Pull historical rule preambles for protest defense or contract interpretation

FAQ from Federal Register MCP

Does Federal Register MCP require an API key?

No. The Federal Register API is fully public; no key or authentication is needed.

What date range of documents does it cover?

Federal Register documents from 1994 to today.

Is the server hardened for production use?

Yes. It has been live‑audited against the production Federal Register API across multiple rounds, handling document type variants, CFR part normalization, comment period date parsing, and pagination.

Which MCP clients are compatible?

Claude Desktop, Codex (ChatGPT), Gemini CLI, Copilot, Claude Code, Cursor, Cline, Zed, Continue, and any other MCP‑compatible client.

What license is used?

MIT licensed.