Bay Area Transit MCP Servers

Two Cloudflare Workers providing MCP (Model Context Protocol) access to BART and SF Muni real-time transit data. Works with Claude, ChatGPT, Poke, Cursor, and any MCP-compatible client.

You don't need to deploy anything. Just point your MCP client at the hosted endpoints below.

Live Endpoints

• BART: https://bart-mcp.srivastsh.workers.dev/mcp — no auth, just connect

• Muni: https://muni-mcp.srivastsh.workers.dev/mcp — pass your free 511.org API key via x-api-key-511 header

These run on Cloudflare Workers' free tier (100k requests/day). Since the Muni server uses BYOK auth, each user's 511 rate limit is isolated to their own key.

Related MCP server: marta-mcp

Quick Start

BART (no auth required)

Just add the URL to your MCP client. No API key needed.

Muni (BYOK)

1. Get a free 511.org API key at https://511.org/open-data/token

2. Pass it via the x-api-key-511 header in your MCP config

Client Configuration

Claude Desktop / Claude Code

{
  "mcpServers": {
    "bart": {
      "url": "https://bart-mcp.srivastsh.workers.dev/mcp"
    },
    "muni": {
      "url": "https://muni-mcp.srivastsh.workers.dev/mcp",
      "headers": {
        "x-api-key-511": "YOUR_511_API_KEY"
      }
    }
  }
}

Poke

One-click setup: BART recipe | Muni recipe

Or add manually as a remote MCP server:

• URL: https://bart-mcp.srivastsh.workers.dev/mcp or https://muni-mcp.srivastsh.workers.dev/mcp

• For Muni, set custom header x-api-key-511 to your 511 key

Cursor / Windsurf / stdio-only Clients

Use mcp-remote as a bridge:

{
  "mcpServers": {
    "bart": {
      "command": "npx",
      "args": ["-y", "@anthropic-ai/mcp-remote", "https://bart-mcp.srivastsh.workers.dev/mcp"]
    },
    "muni": {
      "command": "npx",
      "args": [
        "-y", "@anthropic-ai/mcp-remote",
        "https://muni-mcp.srivastsh.workers.dev/mcp",
        "--header", "x-api-key-511:YOUR_511_API_KEY"
      ]
    }
  }
}

Available Tools

BART (5 tools)

Muni (7 tools)

Deploy Your Own

Most users don't need to deploy — just use the hosted endpoints above. But if you want your own instance:

Prerequisites

• Node.js 18+

• Cloudflare account (free tier works)

• wrangler CLI: npm install -g wrangler

BART Worker

cd bart-mcp
npm install
wrangler login
wrangler deploy

The public BART demo key (MW9S-E7SL-26DU-VV8V) is baked into wrangler.toml. No secrets needed.

Muni Worker

cd muni-mcp
npm install
wrangler deploy

Optionally set a fallback 511 key (used when no header key is provided):

wrangler secret put API_511_KEY

Architecture

• Runtime: Cloudflare Workers (V8 isolates)

• Transport: WebStandardStreamableHTTPServerTransport (stateless, one server per request)

• Auth: BYOK via request headers, optional env secret fallback

• Validation: Zod schemas for all tool inputs

• CORS: Enabled for all origins

• API Sources: api.bart.gov (BART), api.511.org (Muni/511)