eCFR MCP Server

by 1102tools Your server? Claim it

local only

eCFR runs on your own machine — the client starts it, so there is no endpoint to ping. 412 installs a week from pypi. Last commit 13 Sep 2026.

Electronic Code of Federal Regulations including FAR and DFARS. 13 tools.

Installs per day peak 732 · avg 151 · -63% w/w

a month agotoday

412

Installs / week

pypi · ecfr-mcp

Stars

2 open issues

13 Sep 2026

Last commit

0 releases in 90 days

MIT

License

Python

What changed 32

Every tool that appeared, vanished or quietly changed what it asks for. Recorded since 18 August 2026. No other catalogue keeps this.

18 Sep the owner changed

17 Sep the owner changed

16 Sep the owner changed

15 Sep the owner changed

14 Sep the owner changed

13 Sep the owner changed

12 Sep the owner changed

11 Sep the owner changed

10 Sep the owner changed

9 Sep the owner changed

and 22 more, back to 18 August 2026

What the code does

We read the source, 7 d ago · rules 3dff92dd89df

Capabilities

What this server is able to do. For an MCP server this is often the job itself — a terminal server runs commands because that is what it is for. Listed so you know what you are plugging in, not as an accusation.

File ships in the package but is absent from the source [пакет] src/ecfr_mcp/__init__.py:1, [пакет] src/ecfr_mcp/constants.py:1, [пакет] src/ecfr_mcp/server.py:1

этот файл ставится пользователю, но в репозитории его нет

Is this your server and something here is wrong? Tell us — corrections are free and do not require a plan.

This code can reach further than it looks

We found places where it runs commands, builds paths or queries from values it is given. None of that is a flaw by itself — it becomes one when the code changes, and code changes quietly between releases. We re-read it on every one.

Connect this server

This server runs on your own machine — install it with the package manager and the client starts it for you. Package name taken from the official registry entry.

Claude Code Claude Desktop Codex Cursor VS Code

run in your terminal

claude mcp add ecfr-mcp -- uvx ecfr-mcp

~/Library/Application Support/Claude/claude_desktop_config.json

{
  "mcpServers": {
    "ecfr-mcp": {
      "args": [
        "ecfr-mcp"
      ],
      "command": "uvx"
    }
  }
}

~/.codex/config.toml

[mcp_servers.ecfr-mcp]
command = "uvx"
args = ["ecfr-mcp"]

.cursor/mcp.json

{
  "mcpServers": {
    "ecfr-mcp": {
      "args": [
        "ecfr-mcp"
      ],
      "command": "uvx"
    }
  }
}

.vscode/mcp.json

{
  "mcpServers": {
    "ecfr-mcp": {
      "args": [
        "ecfr-mcp"
      ],
      "command": "uvx"
    }
  }
}

Alternatives to eCFR

same job, measured the same way

eCFR

by 1102tools

Electronic Code of Federal Regulations including FAR, DFARS, and agency supplements. 13 tools.

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Us Code

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answering

LandLens rental records

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4 tools answering

JavaLens

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eCFR — questions

Answers built from our own checks of this server.

Why is there no uptime for eCFR?

eCFR runs on your own machine over stdio — there is no network address to reach, so uptime cannot be measured for it by anyone. What can be measured is adoption: the pypi package ecfr-mcp was installed 412 times last week.

How do I connect eCFR?

Copy the ready config from this page — we generate it for Claude Code, Claude Desktop, Codex, Cursor and VS Code, each with the file path that client actually reads. It runs locally, so the command pulls ecfr-mcp straight from pypi; nothing to host, nothing to sign up for.

How many people use eCFR?

The pypi package ecfr-mcp was installed 412 times in the last week. Week over week that is -63%. We show installs rather than GitHub stars on purpose: a star is a bookmark, an install is someone actually running it.

Is eCFR open source?

Yes — it is published under the MIT licence, written in Python, 23 stars on GitHub and 2 open issues. The source link is on this page, so you can read exactly what it does with your data before you connect it.