eCFR
eCFR is an MCP server that adds developer tools to AI assistants such as Claude Desktop, Claude Code and Cursor. Electronic Code of Federal Regulations including FAR, DFARS, and agency supplements. It has 27 GitHub stars, is released under the MIT license and runs locally with uvx ecfr-mcp.
github.com/1102tools-dev/federal-contracting-mcps (opens in a new tab)
Data as of from the GitHub API and the official MCP registry; description from the project's repository. Report an error
Install eCFR
Generated from the server's MCP registry entry. Replace your-value with your own values.
Claude Desktop
{
"mcpServers": {
"ecfr": {
"command": "uvx",
"args": [
"ecfr-mcp"
]
}
}
}Settings > Developer > Edit Config. macOS: ~/Library/Application Support/Claude/, Windows: %APPDATA%\Claude\. Restart Claude Desktop afterwards.
Claude Code
claude mcp add --transport stdio ecfr -- uvx ecfr-mcpCursor
{
"mcpServers": {
"ecfr": {
"type": "stdio",
"command": "uvx",
"args": [
"ecfr-mcp"
]
}
}
}Project file; use ~/.cursor/mcp.json to enable it in every project.
VS Code
{
"servers": {
"ecfr": {
"type": "stdio",
"command": "uvx",
"args": [
"ecfr-mcp"
]
}
}
}Claude Code (remote)
claude mcp add --transport http ecfr "https://ecfr.1102tools.com/mcp"The same server is also hosted as a remote MCP endpoint, so nothing runs on your machine.
Config formats checked against the official docs on Oct 7, 2026: modelcontextprotocol.io (opens in a new tab), code.claude.com (opens in a new tab), cursor.com (opens in a new tab), code.visualstudio.com (opens in a new tab).
About eCFR
Free, open-source MCP server for the eCFR (Electronic Code of Federal Regulations) API. Read FAR, DFARS, and all agency FAR supplement text with no authentication required.
- mcp
- model-context-protocol
- sam-gov
- usaspending
- federal-contracting
- federal-data
- govcon
- mcp-server
- acquisition
- federal-acquisition
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How do I install the eCFR MCP server?
Add the command uvx ecfr-mcp to your MCP client: put it in claude_desktop_config.json for Claude Desktop, run claude mcp add for Claude Code, or add it to .cursor/mcp.json (Cursor) or .vscode/mcp.json (VS Code). The snippets on this page are ready to paste.
Is eCFR free?
The server is open source under the MIT license, so running it is free. It does not declare any required API key.
Is eCFR actively maintained?
The most recent commit was on Oct 25, 2026. The latest release is v1.0.34, published Oct 21, 2026. appsgit only lists MCP servers with a commit in the last six months.