Simple MCP SSE Bridge

A lightweight SSE bridge for Model Context Protocol (MCP) servers that supports web-based authentication.

Features

• ✅ No authentication required - Perfect for MCP servers with web-based login portals
• ✅ Zero configuration - Just provide the server URL
• ✅ Lightweight - Minimal dependencies, pure Node.js
• ✅ Secure - No credentials stored in config files

Installation

npx simple-mcp-sse-bridge <server-url>

Or install globally:

npm install -g simple-mcp-sse-bridge
simple-mcp-sse-bridge <server-url>

Usage

With Claude Desktop

Add to your claude_desktop_config.json:

{
  "mcpServers": {
    "my-mcp-server": {
      "command": "npx",
      "args": [
        "-y",
        "simple-mcp-sse-bridge",
        "http://your-server.com/sse"
      ]
    }
  }
}

Command Line

simple-mcp-sse-bridge http://your-server.com/sse

How It Works

This bridge creates a simple stdio ↔ HTTP proxy:

Claude Desktop (stdio)
       ↓
Simple MCP SSE Bridge
       ↓
MCP Server (HTTP/SSE)

Unlike other bridges, this one doesn't require environment variables or credentials. It's perfect for MCP servers that handle authentication via web portals or other means.

Use Cases

• MCP servers with web-based login portals
• Multi-user MCP servers with session-based authentication
• Development and testing of MCP servers
• Any SSE-based MCP server that doesn't need client-side credentials

License

MIT

Contributing

Contributions welcome! Please open an issue or PR on GitHub.

Author

Created for the MOSL OpenAPI MCP Server project.