Log inSubmit server
Federal Regulations MCP Server logo

Federal Regulations MCP Server

Search and trace US federal rules across Federal Register, eCFR, and Regulations.gov through MCP tools.

InstallRepositoryWebsite
Full README Compare alternatives Embed widget Claim this listing

Install Federal Regulations MCP Server

Pick your client, then add it in one click or paste the config.

STDIONode.js
~/Library/Application Support/Claude/claude_desktop_config.json
claude_desktop_config.json
{
  "mcpServers": {
    "federal-regulations-mcp-server": {
      "command": "bunx",
      "args": [
        "@cyanheads/federal-regulations-mcp-server@latest"
      ]
    }
  }
}

Settings → Developer → Edit Config, merge this into mcpServers, then fully quit and reopen Claude Desktop.

Install not yet sandbox-tested— we haven't run this command through our automated sandbox yet. Not a red flag; we're working through the catalog.

Overview

The federal-regulations-mcp-server MCP server connects agents to the Federal Register, eCFR, and Regulations.gov for rule, CFR, docket, and comment research. It supports searching and retrieving Federal Register documents, browsing or reading current and historical CFR text, and following document references into dockets and public comments. Run it over STDIO, local Streamable HTTP, or the listed hosted endpoint. Reach for it when an agent needs to trace a rule from publication and comments through codified regulation text.

Use cases

  • Search Federal Register rules by agency, date, CFR part, docket, or RIN
  • Trace a published rule into its docket and public comments
  • Read current or historical CFR sections and appendices
  • Find federal documents with open comment periods
  • Retrieve comment bodies and attachments from Regulations.gov

Key features

  • Federal Register rule and document search
  • CFR structure, full-text, and historical text access
  • Regulations.gov docket and comment retrieval
  • Cross-source document, docket, and CFR references
  • STDIO and Streamable HTTP operation
  • Open-comment deadline listing

Tools7

What Federal Regulations MCP Server lets your agent do. Expand a tool for its parameters.

Self-reported~246 tokens of context

Security & health

What it can reach and how reliably it runs — from our own checks, not the maintainer’s claims.

ActiveLast checked Today

Recent health check succeeded.

6/6 checks healthy over the last 40d

Supply-chain signal

No high-severity advisories surfaced by our automated scan.

Critical 0High 0Medium 0Low 0

Scanned 15d ago via OSV.dev · @cyanheads/federal-regulations-mcp-server@latest (npm)

Adoption & maintenance

Factual signals from GitHub, npm, and our automated checks — not a rating.

GitHub stars1Stargazers on the source repository.
npm downloads1.9kPackage downloads in the last 30 days.
Last commit13d agoMost recent push to the default branch.
Tools exposed7Callable tools this server registers over MCP.

How Federal Regulations MCP Server works

What federal-regulations-mcp-server does

The federal-regulations-mcp-server MCP server gives an MCP client access to three US federal regulatory sources: the Federal Register, the eCFR, and Regulations.gov. It supports research across proposed rules, final rules, notices, presidential documents, codified regulations, rulemaking dockets, and public comments.

A typical research path can begin with a Federal Register search, continue through the returned document number and docket identifiers, and end with the related CFR text or filed comments. Search results expose references such as citations, CFR parts, docket IDs, comment counts, comment URLs, and comment deadlines for that purpose.

How it works

The server exposes seven tools and two corresponding resources. Federal Register searches can combine full-text queries with document type, agency slug, publication dates, CFR part, docket number, or RIN filters. A page citation can also be resolved to the documents printed on that page when the required date information is supplied.

Federal Register documents can be retrieved by document number, optionally with paginated full text. CFR access supports title and part structure browsing, full-text search, individual sections, complete parts, appendices, and point-in-time text from 2017 onward where available. Results identify whether CFR content came from the local mirror or a live source.

Regulations.gov tools retrieve dockets and comments, including comment bodies and attachments. Docket and comment operations require a Regulations.gov key. Another tool lists documents that are currently accepting comments, ordered by closing date.

Setup and configuration

The federal-regulations-mcp-server MCP server can run as a STDIO process, a local Streamable HTTP server, or through the public hosted endpoint at https://federal-regulations.caseyjhand.com/mcp. The repository provides installation links for Claude Desktop, Cursor, and VS Code. Its package can also be launched with the npm-based command shown by the installation link:

Terminal
npx -y @cyanheads/federal-regulations-mcp-server

A Regulations.gov API key is required for docket and comment tools.

Tools and capabilities

The available tools are:

  • regulations_search_rules: find Federal Register records or resolve a page citation.
  • regulations_get_document: retrieve document metadata and optionally paginated body text.
  • regulations_browse_cfr: inspect CFR hierarchy or search codified text.
  • regulations_get_cfr_section: read a section, part, appendix, or historical version.
  • regulations_get_docket: retrieve a Regulations.gov docket and its filed documents.
  • regulations_find_comments: retrieve comments or an individual comment with attachments.
  • regulations_list_open_comments: find currently open comment opportunities.

The resources regulations://document/{documentNumber} and regulations://cfr/{title}/{part}/{section} provide a document record and current CFR section text. They mirror two of the tools, so clients that only expose tools can still use the equivalent operations.

Limitations and notes

Federal Register search results are limited to the source's first 50 pages, and counts stop at 10,000. CFR live search is limited to its first 10,000 hits. Large Federal Register documents and CFR responses are returned in character windows and must be paged with offsets. Full-text retrieval supports up to 200,000 characters per request.

CFR historical reads cover dates from 2017-01-01 through the title's current available date. Regulations.gov docket and comment access depends on a required API key.

Read the full README View source on GitHub

Reviews

No reviews yet — be the first to share how it worked for you.

Frequently Asked Questions about Federal Regulations MCP Server

federal-regulations-mcp-server is an MCP server that connects AI clients to the Federal Register, eCFR, and Regulations.gov. Its main tools search and retrieve Federal Register documents, browse and read CFR text, retrieve rulemaking dockets, fetch public comments, and list documents with open comment periods.

Install it with the npm package command `npx -y @cyanheads/federal-regulations-mcp-server`, or use the repository's installation links for Claude Desktop, Cursor, or VS Code. It can run as a STDIO process or a local Streamable HTTP server.

Yes, federal-regulations-mcp-server works with Cursor. The repository provides a Cursor MCP installation link that configures the package to run with `npx`.

Yes, a Regulations.gov key is required for the docket and public-comment tools.

Related MCP servers

All in Legal All alternatives
Add a badge to your READMEShow it’s listed — live SVG, Markdown or HTML.

AllMCPs Directory Badge

Full Badge Customizer

Showcase your server listing on GitHub or your project documentation. Embed this dynamic SVG badge to highlight official listing status and live engagement.

Badge Style:
Live Dynamic SVG PreviewFederal Regulations MCP Server AllMCPs Directory Badge
Markdown (GitHub README)
[![AllMCPs](https://allmcps.com/api/badge/federal-regulations-mcp-server?style=directory)](https://allmcps.com/mcp/federal-regulations-mcp-server)
HTML Embed
<a href="https://allmcps.com/mcp/federal-regulations-mcp-server"><img src="https://allmcps.com/api/badge/federal-regulations-mcp-server?style=directory" alt="Federal Regulations MCP Server on AllMCPs" /></a>