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MCP Proxy

@punkpeye

リポジトリ

基本情報

カテゴリ

その他

ライセンス

MIT

トランスポート

stdio

作者

punkpeye

MCP Proxy について

A TypeScript streamable HTTP and SSE proxy for MCP servers that use stdio transport.

MCP Proxy の設定

以下の設定を使って、このサーバーを MCP 対応クライアントに追加してください。

{
  "mcpServers": {
    "mcp-proxy-punkpeye": {
      "command": "npx",
      "args": [
        "mcp-proxy",
        "npx",
        "-y",
        "@anthropic/mcp-server-filesystem",
        "/path"
      ]
    }
  }
}

MCP Proxy のツール

ツール一覧はまだありません

この掲載には表示できるツール一覧がまだありません。サーバーにツールがないという意味ではありません。対応機能はプロジェクトのドキュメントをご確認ください。

上のボタンで一時的なサンドボックスでこのサーバーを実行し、ツール一覧を取得できます。

概要

What is MCP Proxy?

MCP Proxy is a TypeScript streamable HTTP and SSE proxy for MCP servers that use stdio transport. It enables remote access to local stdio-based MCP servers over HTTP or SSE, intended for developers who need to expose such servers.

How to use MCP Proxy?

Install via npm install mcp-proxy and run from the command line with npx mcp-proxy followed by the stdio server command. Options include --port, --apiKey, --tunnel, and transport selection. Programmatic use is available via startHTTPServer from the Node.js SDK.

Key features of MCP Proxy

  • Streamable HTTP and SSE transport for stdio MCP servers
  • CORS enabled by default with configurable options
  • Optional API key authentication
  • Public tunnel support for exposing local servers
  • Stateless mode for serverless deployments
  • Configurable timeouts and debug logging

Use cases of MCP Proxy

  • Hosting a stdio MCP server remotely for browser-based clients
  • Testing MCP servers over HTTP without modifying the server
  • Sharing a local MCP server via a public tunnel for webhook testing
  • Deploying MCP servers in serverless environments using stateless mode

よくある質問

1

Does MCP Proxy require changes to the stdio server?

No, it works with any stdio-based MCP server without modifications. The proxy handles the protocol translation.

2

What transport protocols does MCP Proxy support?

It supports both streamable HTTP (default endpoint `/mcp`) and SSE (default endpoint `/sse`). Both are enabled by default but can be toggled individually.

3

How do I enable authentication?

Pass `--apiKey "your-secret-key"` on the command line or set the `MCP_PROXY_API_KEY` environment variable. Clients must then include the `X-API-Key` header.

4

Can I use MCP Proxy with Python MCP servers?

Yes, but ensure Python is run in unbuffered mode (e.g., `python -u`) or set `PYTHONUNBUFFERED=1` to prevent timeouts.

5

How does stateless mode differ from the default?

Default mode maintains persistent sessions per client. Stateless mode (`--stateless`) creates a new server instance per request, useful for serverless or memory-constrained environments.

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