Relay MCP Server

A wonderfully simple tool that moves information - files, code, data, comments, directions, etc. - between Claude Desktop and Claude Code while keeping their main context windows separate. It runs locally over stdio via the published package.

People connecting communication tools to Claude, Cursor, VS Code, or another MCP client. The project is written in Python.

VERIFIED ACTIVE

LAST COMMIT 2026-01-28 · ★ 4 · #76 OF 99 MAINTAINED COMMUNICATION · VERIFIED 2026-08-25

MIT · Python servers · how we verify → /methodology

01 · Install Relay

Claude Code

claude mcp add mhcoen-mcp-relay -- uvx mcp-server-relay

Claude Desktop / Cursor / VS Code - add to config

{
  "mcpServers": {
    "mhcoen-mcp-relay": {
      "command": "uvx",
      "args": [
        "mcp-server-relay"
      ]
    }
  }
}

Same JSON for Cursor. For VS Code, rename the top-level key from `mcpServers` to `servers`.

Using another client? Same JSON, different key

Claude Desktop · mcpServers

Cursor · mcpServers

VS Code · servers

Windsurf · mcpServers

Zed · context_servers

Cline · mcpServers

Roo Code · mcpServers

Continue · mcpServers

LibreChat · mcpServers

Gemini CLI · mcpServers

Codex CLI · mcp_servers

Full setup guides: every client.

02 · Evidence

Security posture

What to check before giving this server access to your agent - from the registry, GitHub, and our own probes. We don't score safety; we show what's verifiable.

runs as local process (stdio) - runs on your machine with your user's permissions

license MIT - declared in the repository

pypi package mcp-server-relay - check the name against the project README before installing (PyPI has no namespace ownership)

registry namespace io.github.mhcoen is GitHub-verified and matches the repo owner

03 · Who maintains Relay

Relay is maintained by mhcoen. It's the only MCP server we track from this author; the repo dates to Dec 2025.

04 · Facts

repository: github.com/mhcoen/mcp-relay
category: communication - ranked #76 of 99 actively-maintained communication servers as of 2026-08-25.
registry: io.github.mhcoen/mcp-relay (active, first published 2025-12-31 · 2 versions)
packages: pypi:mcp-server-relay

05 · Relay FAQ

What is Relay?

Is Relay still maintained?

Yes - as of 2026-08-25, its last commit was 2026-01-28. We re-verify nightly.

How do I install Relay?

Run `uvx mcp-server-relay`. You can also paste the ready-made client config above.

Does Relay run locally?

Yes - it's a stdio server: it runs on your machine (via uvx) with your user's permissions. Your data stays local unless the server itself calls external APIs.

06 · Alternatives to Relay

Alternatives to Relay

Maintained communication servers if Relay isn't the fit.

Pairs well with

Servers that cover what Relay doesn't - only shown when the pairing reason fits the companion.

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