CyanMycelium MCP Broker

Local install

io.github.pandaGaume/mcp-brokerv1.12.0 GitHub verified

One host and one port for many MCP servers: browsers, devices, simulators and stdio tools.

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Registry entry

Open in the registry

{
  "_meta": {
    "io.modelcontextprotocol.registry/official": {
      "status": "active",
      "isLatest": true,
      "updatedAt": "2026-11-15T07:37:42.162777Z",
      "publishedAt": "2026-11-15T07:37:42.162777Z",
      "statusChangedAt": "2026-11-15T07:37:42.162777Z"
    }
  },
  "server": {
    "name": "io.github.pandaGaume/mcp-broker",
    "icons": [
      {
        "src": "https://pandagaume.github.io/mcp-broker/assets/logo.png",
        "mimeType": "image/png"
      }
    ],
    "title": "CyanMycelium MCP Broker",
    "$schema": "https://static.modelcontextprotocol.io/schemas/2025-12-11/server.schema.json",
    "version": "1.12.0",
    "packages": [
      {
        "version": "1.12.0",
        "transport": {
          "type": "stdio"
        },
        "identifier": "@cyanmycelium/mcp-broker",
        "runtimeHint": "npx",
        "registryType": "npm",
        "registryBaseUrl": "https://registry.npmjs.org",
        "environmentVariables": [
          {
            "name": "MCP_BROKER_STDIO_PROVIDER",
            "value": "_all",
            "description": "Slot bridged to stdio. Keep _all: it exists before any provider connects and aggregates every opted-in provider."
          },
          {
            "name": "MCP_BROKER_PORT",
            "format": "number",
            "default": "3000",
            "description": "TCP port for provider tunnels (ws://<host>:<port>/provider/<slot>) and client transports (/<slot>/mcp). One broker per port."
          },
          {
            "name": "MCP_BROKER_HOST",
            "default": "127.0.0.1",
            "description": "Interface to bind. 127.0.0.1 keeps the broker private to this machine; 0.0.0.0 exposes it on the network."
          }
        ]
      }
    ],
    "repository": {
      "id": "1243384154",
      "url": "https://github.com/pandaGaume/mcp-broker",
      "source": "github",
      "subfolder": "node/packages/broker"
    },
    "websiteUrl": "https://pandagaume.github.io/mcp-broker/",
    "description": "One host and one port for many MCP servers: browsers, devices, simulators and stdio tools."
  }
}

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Try it

This server only runs locally, from a package. Install it with the instructions on this page to try it.

Install

Pick your client. Values in capitals, like YOUR_TOKEN, are yours to fill in.

One click: Add to Cursor Add to VS Code Add to LM Studio Add to Goose

Run in a terminal

claude mcp add mcp-broker \
  -- npx -y @cyanmycelium/[email protected]

Environment

MCP_BROKER_STDIO_PROVIDER (optional, not in the config above): Slot bridged to stdio. Keep _all: it exists before any provider connects and aggregates every opted-in provider.
MCP_BROKER_PORT (optional, not in the config above): TCP port for provider tunnels (ws://<host>:<port>/provider/<slot>) and client transports (/<slot>/mcp). One broker per port.
MCP_BROKER_HOST (optional, not in the config above): Interface to bind. 127.0.0.1 keeps the broker private to this machine; 0.0.0.0 exposes it on the network.

Tools

We don't run packages, so we can't list this server's tools.