io.github.cyanheads/federal-regulations-mcp-server MCP Server

io.github.cyanheads/federal-regulations-mcp-server

Repository Registry

What is the io.github.cyanheads/federal-regulations-mcp-server MCP server?

Search and trace US federal rules across the Federal Register, eCFR, and Regulations.gov.

How to install io.github.cyanheads/federal-regulations-mcp-server

Copy-paste configuration for popular MCP clients.

transport: stdio

Config generated by PluginBench — verify against the source before use.

Environment / auth

REGULATIONS_GOV_API_KEY
secret
api.data.gov key for the Regulations.gov tools (get_docket, find_comments). Free at https://api.data.gov/signup/. The Federal Register and eCFR tools work without it.
MCP_LOG_LEVEL
Sets the minimum log level for output (e.g., 'debug', 'info', 'warn').
MCP_HTTP_HOST
The hostname for the HTTP server.
MCP_HTTP_PORT
The port to run the HTTP server on.
MCP_HTTP_ENDPOINT_PATH
The endpoint path for the MCP server.
MCP_AUTH_MODE
Authentication mode to use: 'none', 'jwt', or 'oauth'.
ECFR_MIRROR_REFRESH_CRON
Cron expression for an in-process eCFR mirror refresh (e.g. '0 4 * * 0'). Unset registers no job. Each run re-harvests every configured title in full, and a tick is skipped until mirror:init has completed once.

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

{
  "mcpServers": {
    "federal-regulations-mcp-server": {
      "command": "node",
      "args": [
        "-y",
        "@cyanheads/federal-regulations-mcp-server",
        "run",
        "start:stdio"
      ],
      "env": {
        "REGULATIONS_GOV_API_KEY": "<YOUR_REGULATIONS_GOV_API_KEY>",
        "MCP_LOG_LEVEL": "<YOUR_MCP_LOG_LEVEL>",
        "MCP_HTTP_HOST": "<YOUR_MCP_HTTP_HOST>",
        "MCP_HTTP_PORT": "<YOUR_MCP_HTTP_PORT>",
        "MCP_HTTP_ENDPOINT_PATH": "<YOUR_MCP_HTTP_ENDPOINT_PATH>",
        "MCP_AUTH_MODE": "<YOUR_MCP_AUTH_MODE>",
        "ECFR_MIRROR_REFRESH_CRON": "<YOUR_ECFR_MIRROR_REFRESH_CRON>"
      }
    }
  }
}

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