create-multicast

One command to set up Multicast — an MCP gateway that gives Claude.ai access to all your MCP servers through a single integration, with parallel execution.

Usage

npx create-multicast

What It Does

1. Scans your machine for existing MCP configurations

   • Claude Code (~/.claude.json)
   • Claude Desktop (~/Library/Application Support/Claude/claude_desktop_config.json)
   • Cursor (~/.cursor/mcp.json)
   • VS Code (.vscode/mcp.json)

2. Classifies your servers

   • HTTP servers (compatible with Multicast)
   • stdio servers (local only, not compatible)

3. Lets you select which servers to register

4. Auto-detects credentials from existing configs

   • Authorization headers
   • API keys, tokens, secrets from env vars

5. Deploys to Cloudflare Workers

   • Creates D1 database for tool discovery cache
   • Sets encrypted env vars for server credentials
   • Deploys the Worker

6. Outputs the URL to add to Claude.ai

Example

$ npx create-multicast

  create-multicast

  MCP gateway for Claude.ai — one integration, all your servers, parallel execution.
  Runs on Cloudflare Workers (free tier). Costs $0/month.

  Scanning for existing MCP configurations...

  Found 5 MCP servers:

  ✓ context-hub     https://context-hub.user.workers.dev    [HTTP]
  ✓ supabase-mcp    https://supabase-mcp.example.com        [HTTP]
  ✗ filesystem      command: npx @mcp/filesystem             [stdio — skipped]
  ✗ git             command: npx @mcp/git                    [stdio — skipped]
  ✓ github-mcp      https://github-mcp.example.com           [HTTP]

  2 stdio servers skipped — they run locally and can't be called from a cloud worker.

  Select servers to register with Multicast:
  ◼ context-hub
  ◼ supabase-mcp
  ◼ github-mcp

  ...deploying...

  Deployed! https://multicast.user.workers.dev/mcp

  Add to Claude.ai:
  → Settings → Integrations → Add MCP Server
  → Paste the URL above

What is Multicast?

Multicast is a free, open-source MCP gateway on Cloudflare Workers.

The problem: Claude.ai requires a separate integration for each MCP server. 5 servers = 5 integrations, 5 OAuth setups, and sequential tool execution.

The solution: Add Multicast once. It connects to all your MCP servers and calls them in parallel.

• One integration instead of many
• Parallel execution instead of sequential
• Unified tool discovery
• $0/month on Cloudflare Workers free tier

How Credentials Work

• You deploy your own Multicast instance on your Cloudflare account
• Server URLs and auth tokens are stored as encrypted environment variables
• Credentials never leave your infrastructure
• No shared servers, no central authority

Adding Servers After Setup

# Add a new server
npx wrangler secret put MCP_SERVER_NEWSERVICE
npx wrangler secret put MCP_AUTH_NEWSERVICE   # if auth needed
npx wrangler deploy

Requirements

• Node.js 18+
• Free Cloudflare account
• At least one HTTP-accessible MCP server

stdio vs HTTP

Multicast runs in the cloud. It can only call MCP servers with HTTP endpoints. Local stdio servers (filesystem, git, sqlite) are detected but skipped with an explanation.

Links

• GitHub
• Cloudflare Workers

License

MIT