mcp-proxy

mcp-proxy

4
communication

MCP Proxy acts as a bridge to facilitate communication between SSE-based MCP servers and clients using standard input/output. It's designed for tools like Claude Desktop to interface with MCP implementations easily.

MCP Proxy

A Stdio MCP server which proxies an SSE MCP server.

Overview

This proxy acts as a bridge between:

  • An SSE-based MCP server endpoint
  • Standard input/output for MCP client communication

It enables tools that use standard I/O for communication such as Claude Desktop (as of 2025-04-01) to interact with MCP implementations through an SSE interface.

Requirements

  • JDK 21 or higher
  • Gradle 8.0+ (Wrapper included)

Build Jar

./gradlew shadowJar

Testing

# Run all tests
./gradlew test

# Run a specific test
./gradlew test --tests "net.portswigger.TestName"