Bay Area Transit

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.

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)

Tool	Description
bart_stations	List all BART stations with codes
bart_departures	Real-time departures from a station
bart_trip	Plan a trip between two stations
bart_advisories	Current service advisories
bart_fare	Fare lookup between two stations

Muni (7 tools)

Tool	Description
transit_operators	List all 511 transit operators
muni_routes	List all Muni routes
muni_departures	Real-time departures from a stop
muni_line	Line details with stops
muni_alerts	Current service alerts
muni_vehicles	Real-time vehicle GPS positions
muni_schedule	Timetable for a line

---

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)