Open MCP

Features

• Provides a CLI with parameters and options similar to docker
• Connects to a remote server via SSE and exposes it as a stdio server
• Connects to a local server via stdio and exposes it as an SSE server
• Implements an SSE server that acts as a proxy, forwarding events from a remote SSE server

Usage

Installing

cargo install --git https://github.com/decentralized-mcp/proxy.git

Building

cargo build --release

Running

The proxy can operate in three modes:

1. SSE Client Mode

Connect to a remote MCP server over SSE and expose it as a stdio server.

This allows a local client such as Claude or Cursor connect to a remote server running on SSE.

openmcp run -p remote_sse_server_host:remote_sse_server_port/sse

2. Stdio Client Mode

Connect to a local command using stdio and expose it as an SSE server.

This allows remote SSE connections to a local stdio server.

openmcp run -p exposed_ip:exposed_port your-command
openmcp run -p exposed_ip:exposed_port -e KEY=VALUE your-command

openmcp run -p 8000 npx -y @modelcontextprotocol/server-everything

3. Proxy Mode

Connect to a remote MCP server over SSE and expose it as an SSE server.

This allows remote SSE connections proxy to other remote server.

openmcp run -p exposed_ip:exposed_port:remote_sse_server_host:remote_sse_server_port/sse

Self testing

// Launch in Stdio Client Mode
openmcp run -p 8000 npx -y @modelcontextprotocol/server-everything

// Launch in Proxy Mode, connecting to the SSE server launched above
openmcp run -p 8001:http://127.0.0.1:8000/sse

// Run the inspector to verify SSE servers on ports 8000 and 8001
npx @modelcontextprotocol/inspector