xMCP Server

A streamable HTTP MCP server that proxies requests to stdio MCP servers within a container, providing a consistent command environment.

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xMCP Server

xMCP is a streamable HTTP MCP server that proxies requests to stdio MCP servers.

There are already multiple proxy MCP servers out there, but none of them solve the following problem:

What if the stdio MCP server I'd like to use uses a command that is not available in my system?

The answer is to use xMCP!

How it works

Consider the following example:

{
  "mcpServers": {
    "context7": {
      "command": "npx",
      "args": ["-y", "@upstash/context7-mcp"]
    }
  }
}

This command will only work if you have npx installed.

To use this MCP server, transform it to the following:

http://localhost:3001/mcp?name=context7&command=npx&args=-y,@upstash/context7-mcp

By sending this request over the network, you'll be able to use the stdio context7 MCP server over the network.

Why does it work?

xMCP is running inside a container with the most common commands preinstalled. Add whatever you need to the container and you're good to go! (And consider creating a PR if you think others would also benefit from it.)

Available commands

  • npx
  • bunx
  • uv
  • docker

How to use

Local Development

docker compose up -d

# or

make start

Server is running on http://localhost:3001/mcp.

Inspector is running on http://localhost:6274, however, it requires a token to be set in the URL.

Execute make logs, get the URL with the auth token and open it.

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