@crashbytes/pusher-mcp-server

Pusher Channels MCP Server

An MCP (Model Context Protocol) server that gives AI agents the ability to send realtime messages, query channels, and manage users through Pusher Channels.

Tools

Tool	Description
trigger_event	Send an event to one or more channels
trigger_batch_events	Send up to 10 events in a single API call
list_channels	List active channels with optional prefix filter
get_channel_info	Get subscription/user count for a channel
get_presence_users	List users connected to a presence channel
authorize_channel	Generate auth tokens for private/presence channels
terminate_user_connections	Disconnect all connections for a user

Prerequisites

• Node.js 18 or later
• A Pusher Channels account (free tier available)

Installation

npm install -g @crashbytes/pusher-mcp-server

Or clone and build from source:

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

Configuration

You need four environment variables from your Pusher dashboard:

Variable	Description
PUSHER_APP_ID	Your Pusher app ID
PUSHER_KEY	Your Pusher app key
PUSHER_SECRET	Your Pusher app secret
PUSHER_CLUSTER	Your Pusher cluster (e.g. us2, eu, ap1)

Usage with Claude Desktop

Add the following to your Claude Desktop config file:

macOS: ~/Library/Application Support/Claude/claude_desktop_config.json Windows: %APPDATA%\Claude\claude_desktop_config.json

{
  "mcpServers": {
    "pusher": {
      "command": "node",
      "args": ["/path/to/pusher-mcp-server/build/index.js"],
      "env": {
        "PUSHER_APP_ID": "your_app_id",
        "PUSHER_KEY": "your_app_key",
        "PUSHER_SECRET": "your_app_secret",
        "PUSHER_CLUSTER": "us2"
      }
    }
  }
}

If installed globally via npm:

{
  "mcpServers": {
    "pusher": {
      "command": "pusher-mcp-server",
      "env": {
        "PUSHER_APP_ID": "your_app_id",
        "PUSHER_KEY": "your_app_key",
        "PUSHER_SECRET": "your_app_secret",
        "PUSHER_CLUSTER": "us2"
      }
    }
  }
}

Usage with Claude Code

claude mcp add pusher -- node /path/to/pusher-mcp-server/build/index.js

Set the environment variables in your shell before running, or configure them in your Claude Code MCP settings.

Example Prompts

Once configured, you can ask Claude things like:

• "Send a 'deploy-complete' event to the notifications channel with the message 'v2.1.0 deployed'"
• "Show me all active presence channels"
• "How many users are on the presence-lobby channel?"
• "Disconnect user abc123 from all channels"

Development

npm install
npm run dev          # Run with tsx (hot reload)
npm run build        # Compile TypeScript
npm run type-check   # Check types without emitting

Tutorial

For a step-by-step guide on building this server from scratch, see the full tutorial on CrashBytes.

License

MIT