mcp-proxy

3.4

If you are the rightful owner of mcp-proxy and would like to certify it and/or have it hosted online, please leave a comment on the right or send an email to henry@mcphub.com.

MCP Proxy is a Stdio MCP server that proxies an SSE MCP server, enabling communication between standard I/O tools and SSE-based MCP implementations.

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"

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