Bmlt 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.

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What it does

Exposes four tools:

Tool	Description
bmlt_search_meetings	Search meetings by day, format, location, name, or geo coordinates
bmlt_get_meeting_details	Get full details for a specific meeting by ID
bmlt_get_formats	List all meeting format codes and descriptions (O, C, VM, BT, etc.)
bmlt_get_service_bodies	List all service bodies (areas/regions) on the root server
bmlt_get_server_info	Check root server version and geographic center

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"

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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.

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Installation

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

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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

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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

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Environment variables

Variable	Default	Description
TRANSPORT	stdio	Transport mode: stdio or http
PORT	3000	HTTP port (only used when TRANSPORT=http)

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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

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BMLT root servers

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

Network	URL
WSZF (Pacific Northwest)	https://bmlt.wszf.org/main_server
NA World Services (aggregator)	https://na.org/main_server

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

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Contributing

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

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License

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