# eCFR

An MCP server with 13 tools for the electronic Code of Federal Regulations, covering FAR, DFARS and agency supplements.

- MCP server · `type=mcp` · Claude Code, Codex, Cursor, GitHub Copilot, Windsurf (Devin Desktop), Cline, Zed, Gemini CLI · ★ 26
- Author: 1102tools-dev
- License: MIT · policy=link-only · description only; the file stays with the author
- Source: https://github.com/1102tools-dev/federal-contracting-mcps/tree/HEAD/servers/ecfr-mcp
- Updated: 2026-10-24
- HTML: https://affpapa.org/en/nevibecode/mcp/ecfr

## What it does

This server hands your agent the text of the US electronic Code of Federal Regulations. Thirteen tools sit behind it, spanning FAR, DFARS and the supplements individual agencies publish. Useful when a rule lookup or a wording check has to happen mid-task.

Two ways to connect: a remote HTTP endpoint at `https://ecfr.1102tools.com/mcp`, or a local run through `uvx ecfr-mcp`. The local route needs `uvx` present — without it the command fails. Claude, Codex and Gemini CLI get ready-made add commands; Cursor and GitHub Copilot take a JSON config block.

MIT licensed, repo at `1102tools-dev/federal-contracting-mcps`. Supported clients: Claude, Codex, Cursor, GitHub Copilot, Windsurf (Devin Desktop), Cline, Zed and Gemini CLI.

## Requirements
- Needs: Python and uv (commands run via uvx)
- Remote server: `https://ecfr.1102tools.com/mcp`

## Install

### Claude Code (native platform)

1. **Platform CLI: remote server**
```bash
claude mcp add --transport http ecfr-mcp https://ecfr.1102tools.com/mcp
```

2. **Platform CLI**
```bash
claude mcp add ecfr-mcp -- uvx ecfr-mcp
```
uvx runs the command named after the package; if the README names another one, use uvx --from ecfr-mcp <command>

### Codex

1. **Platform CLI: remote server**
```bash
codex mcp add ecfr-mcp --url https://ecfr.1102tools.com/mcp
```

2. **Platform CLI**
```bash
codex mcp add ecfr-mcp -- uvx ecfr-mcp
```
uvx runs the command named after the package; if the README names another one, use uvx --from ecfr-mcp <command>

### Cursor

**Config file**
File `.cursor/mcp.json`:
```json
{
    "mcpServers": {
        "ecfr-mcp": {
            "url": "https://ecfr.1102tools.com/mcp"
        }
    }
}
```
File `.cursor/mcp.json`:
```json
{
    "mcpServers": {
        "ecfr-mcp": {
            "command": "uvx",
            "args": [
                "ecfr-mcp"
            ]
        }
    }
}
```
uvx runs the command named after the package; if the README names another one, use uvx --from ecfr-mcp <command>

### GitHub Copilot

**Config file**
File `.vscode/mcp.json`:
```json
{
    "servers": {
        "ecfr-mcp": {
            "type": "http",
            "url": "https://ecfr.1102tools.com/mcp"
        }
    }
}
```
File `.vscode/mcp.json`:
```json
{
    "servers": {
        "ecfr-mcp": {
            "type": "stdio",
            "command": "uvx",
            "args": [
                "ecfr-mcp"
            ]
        }
    }
}
```
uvx runs the command named after the package; if the README names another one, use uvx --from ecfr-mcp <command>

### Gemini CLI

1. **Platform CLI: remote server**
```bash
gemini mcp add -t http ecfr-mcp https://ecfr.1102tools.com/mcp
```

2. **Platform CLI**
```bash
gemini mcp add ecfr-mcp uvx ecfr-mcp
```
uvx runs the command named after the package; if the README names another one, use uvx --from ecfr-mcp <command>

## When to use it
- pull up a FAR section by number
- check DFARS wording before submitting a claim
- verify a requirement from an agency supplement
- quote a regulation inside a code comment
- look up a defined term in the regulation text

## Example prompts
- Find the FAR section on protest procedures in eCFR
- Show me the DFARS text for this clause
- Which reporting requirement does the agency supplement set?

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From the same set: [1102tools-dev/federal-contracting-mcps](https://affpapa.org/en/nevibecode/by/1102tools-dev/federal-contracting-mcps.md) — 4 cards

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