BMLT Meetings

bmlt-server-mcp

A streamable HTTP Model Context Protocol server that exposes BMLT (Basic Meeting List Toolbox — the Narcotics Anonymous meeting directory) as a set of read-only tools that AI assistants can call directly.

BMLT hosts approximately 85% of Narcotics Anonymous meetings worldwide; the default backend is the BMLT aggregator, which federates every public BMLT root server (server list) into a single search surface — effectively the authoritative AI-accessible source for finding NA meetings.

MCP is an open protocol, so any compatible client works: Claude (Code, Desktop, web), ChatGPT (Connectors and the Responses API), Google Gemini, Cursor, Windsurf, Zed, Cline, Continue, and others.

Unlike the npm bmlt-mcp-server (stdio-only, runs as a local subprocess), this server speaks MCP over HTTP and is meant to be hosted once and consumed remotely.

Built on Laravel + PHP 8.2+ using the official laravel/mcp package.

A live deployment runs at https://mcp.bmlt.app/ (landing page) with a tools reference at https://mcp.bmlt.app/reference.

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Tools

All tools are read-only and idempotent. All tools accept an optional root_server_url argument; if omitted, the configured BMLT_ROOT_SERVER_URL is used.

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Quick start

Docker (recommended)

cp .env.example .env

docker compose up --build

The MCP endpoint is then live at http://localhost:8080/mcp over the Streamable HTTP transport.

Local PHP

composer install

cp .env.example .env php artisan key:generate php artisan serve # http://localhost:8000/mcp

Verify with the MCP Inspector

php artisan mcp:inspector

Then connect to http://localhost:8000/mcp (or :8080 for Docker) and list tools.

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Configuration

All configuration lives in .env (see .env.example). The interesting bits:

Why an allowlist?

The optional root_server_url tool argument lets a single deployment serve any BMLT root, but accepting arbitrary URLs would let callers turn the server into an SSRF probe against your network. The default is a strict allowlist (the configured default root, plus anything you add to BMLT_ALLOWED_ROOTS). Set BMLT_ALLOW_ANY_ROOT=true only when the server is isolated from anything sensitive.

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Connecting AI clients

The endpoint of a deployed instance is https://your-host.example.com/mcp. Replace it below with your own host (or use https://mcp.bmlt.app/mcp to try the public instance).

Claude Code (CLI)

claude mcp add --transport http bmlt https://your-host.example.com/mcp

Claude Desktop — Custom Connector (newer builds)

Settings → Connectors → Add custom connector → paste the URL.

Claude Desktop — Config file (any version, needs Node.js)

{

"mcpServers": { "bmlt": { "command": "npx", "args": ["-y", "mcp-remote", "https://your-host.example.com/mcp"] } } }

ChatGPT / OpenAI Responses API

{

"tools": [ { "type": "mcp", "server_label": "bmlt", "server_url": "https://your-host.example.com/mcp" } ] }

In ChatGPT itself (Pro/Business/Enterprise): Settings → Connectors → Add, using the same URL.

Cursor / Windsurf / Zed / Cline / Continue

All of these read an mcpServers block. For Cursor, edit ~/.cursor/mcp.json (or the project-local .cursor/mcp.json); other clients use a similar config file.

{

"mcpServers": { "bmlt": { "url": "https://your-host.example.com/mcp" } } }

For per-tool parameter documentation and BMLT-API mappings, see the live reference page. For day-to-day commands on a deployed instance (log tailing, usage summaries, cache clears, upgrades), see docs/operations.md.

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Adding authentication

The default config has no auth — anyone who can reach /mcp can call the tools. To gate it:

// routes/ai.php

use Laravel\Mcp\Facades\Mcp;

Mcp::oauthRoutes(); // OAuth 2.1 (Laravel Passport) Mcp::web('/mcp', BmltServer::class) ->middleware('auth:api');

Or add a simple bearer-token check via custom middleware. See the Laravel MCP docs for the full options.

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Architecture

app/

├── Mcp/ │ ├── Servers/BmltServer.php # Registers the 6 tools │ └── Tools/ │ ├── SearchMeetingsTool.php │ ├── GetMeetingTool.php │ ├── ListFormatsTool.php │ ├── ListServiceBodiesTool.php │ ├── GetServerInfoTool.php │ ├── ListRootServersTool.php │ └── Concerns/ResolvesBmltClient.php ├── Services/ │ ├── Bmlt/ │ │ ├── BmltClient.php # Wraps client_interface/json │ │ ├── BmltClientFactory.php # Allowlist enforcement │ │ └── BmltException.php │ └── Geocoding/ │ ├── Geocoder.php # Interface │ ├── GeocoderManager.php # Driver resolver │ ├── NominatimGeocoder.php # OSM (rate-limited, cached) │ ├── GoogleGeocoder.php # Google Geocoding API │ ├── NullGeocoder.php # Disabled │ ├── GeocodingResult.php │ └── GeocodingException.php └── Providers/BmltServiceProvider.php

config/bmlt.php # All knobs routes/ai.php # Mcp::web('/mcp', BmltServer::class)

The HTTP API wrapped by BmltClient is formally specified by the BMLT Semantic OpenAPI document (OpenAPI 3.1) — refer to it for every parameter, response shape, and field definition that BMLT itself supports, even if this MCP server doesn't yet expose it as a tool argument.

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License

MIT