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mcp-proxy

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A bridge between Streamable HTTP and stdio MCP transports

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Overview

The mcp-proxy is a tool that enables MCP servers to operate with SSE (Server-Sent Events) when clients do not support this protocol, acting as a bridge between them.

To use mcp-proxy, install it via the command line using the provided installation command, then configure your client application (e.g., Claude Desktop) to recognize the mcp-proxy server and connect to the MCP server through it.

  • Facilitates connection between MCP servers using SSE transport and clients that lack support. - Easy installation through command line. - Provides configuration options for different environments.
  1. Connecting Claude Desktop to MCP servers that require SSE.
  2. Serving as a workaround for clients needing to interact with incompatible MCP servers.
  3. Enabling real-time data feed for applications that rely on SSE but lack direct support for it.

Add to your AI client

Use these steps to connect mcp-proxy in Cursor, Claude, VS Code, and other MCP-compatible apps. The same JSON appears in the Use with menu above for one-click copy.

Cursor

Add this to your .cursor/mcp.json file in your project root, then restart Cursor.

.cursor/mcp.json

{
  "mcpServers": {
    "mcp-proxy-sparfenyuk": {
      "command": "npx",
      "args": [
        "-y",
        "@modelcontextprotocol/server-mcp-proxy-sparfenyuk"
      ]
    }
  }
}

Claude Desktop

Add this server entry to the mcpServers object in your Claude Desktop config, then restart the app.

~/Library/Application Support/Claude/claude_desktop_config.json (macOS) or %APPDATA%\Claude\claude_desktop_config.json (Windows)

{
  "mcpServers": {
    "mcp-proxy-sparfenyuk": {
      "command": "npx",
      "args": [
        "-y",
        "@modelcontextprotocol/server-mcp-proxy-sparfenyuk"
      ]
    }
  }
}

Claude Code

Add this to your project's .mcp.json file. Claude Code will detect it automatically.

.mcp.json (project root)

{
  "mcpServers": {
    "mcp-proxy-sparfenyuk": {
      "command": "npx",
      "args": [
        "-y",
        "@modelcontextprotocol/server-mcp-proxy-sparfenyuk"
      ]
    }
  }
}

VS Code (Copilot)

Add this to your .vscode/mcp.json file. Requires the GitHub Copilot extension with MCP support enabled.

.vscode/mcp.json

{
  "servers": {
    "mcp-proxy-sparfenyuk": {
      "type": "stdio",
      "command": "npx",
      "args": [
        "-y",
        "@modelcontextprotocol/server-mcp-proxy-sparfenyuk"
      ]
    }
  }
}

Windsurf

Add this to your Windsurf MCP config file, then restart Windsurf.

~/.codeium/windsurf/mcp_config.json

{
  "mcpServers": {
    "mcp-proxy-sparfenyuk": {
      "command": "npx",
      "args": [
        "-y",
        "@modelcontextprotocol/server-mcp-proxy-sparfenyuk"
      ]
    }
  }
}

Cline

Open Cline settings, navigate to MCP Servers, and add this server configuration.

Cline MCP Settings (via UI)

{
  "mcpServers": {
    "mcp-proxy-sparfenyuk": {
      "command": "npx",
      "args": [
        "-y",
        "@modelcontextprotocol/server-mcp-proxy-sparfenyuk"
      ]
    }
  }
}

FAQ

What is the purpose of mcp-proxy?

mcp-proxy is designed to enable connections to MCP servers that operate on SSE by serving as an intermediary for clients lacking native support.

How do I install mcp-proxy?

You can install mcp-proxy using the command `uv tool install git+https://github.com/sparfenyuk/mcp-proxy`.

Is there a way to configure environment variables?

Yes! You can specify environment variables like `SSE_URL` and `API_ACCESS_TOKEN` in the configuration file to manage connection settings.

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