bmlt-mcp-server

An MCP (Model Context Protocol) server for the Basic Meeting List Toolbox (BMLT) — the open-source meeting database used by Narcotics Anonymous service bodies worldwide.

Connect Claude (or any MCP-compatible AI client) to a BMLT root server and query NA meeting data using natural language.

What it does

Exposes four tools:

Example prompts once connected

• "What NA meetings are happening in Portland tonight?"

• "Find open virtual meetings on Tuesday"

• "Show me all meetings within 5 miles of downtown Portland"

• "What does the format code 'BT' mean?"

• "List all service bodies on the WSZF server"

Defaults

Out of the box, the server points to:

• Root server: https://bmlt.wszf.org/main_server (WSZF network)

• Default service body: 26 (Portland Area NA)

All tools accept a root_server_url parameter to point at any BMLT root server, and service_body_ids to scope searches to other areas.

Installation

git clone https://github.com/jbonjour/bmlt-mcp-server.git
cd bmlt-mcp-server
npm install
npm run build

Usage

With Claude Desktop (stdio — recommended)

Add to your Claude Desktop config (~/Library/Application Support/Claude/claude_desktop_config.json on macOS):

{
  "mcpServers": {
    "bmlt": {
      "command": "node",
      "args": ["/absolute/path/to/bmlt-mcp-server/dist/index.js"]
    }
  }
}

Restart Claude Desktop. You'll see the BMLT tools available in your chat.

With Claude Code

claude mcp add bmlt node /absolute/path/to/bmlt-mcp-server/dist/index.js

HTTP mode (for remote/multi-client use)

TRANSPORT=http PORT=3000 node dist/index.js
# Server listens on http://localhost:3000/mcp

Development

npm install
npm run build      # compile TypeScript → dist/
npm start          # run compiled server (stdio)

# Or run via HTTP for testing:
TRANSPORT=http PORT=3000 npm start

To test with the MCP Inspector:

npx @modelcontextprotocol/inspector node dist/index.js

Environment variables

Changing the default root server or service body

Edit src/constants.ts:

export const DEFAULT_ROOT_SERVER = "https://bmlt.wszf.org/main_server";
export const DEFAULT_SERVICE_BODY_ID = 26; // Portland NA

Then rebuild: npm run build

BMLT root servers

Any NA service body running BMLT can be queried. Common root servers:

Find your region's root server at bmlt.app.

Contributing

PRs welcome. This was built to support Portland Area NA's website modernization project and open-sourced for the broader NA tech community.

License

MIT — free to use, share, and modify. All work done by and for the NA community.