Letmediff MCP

The official Letmediff MCP server helping you review your code with an agent first workflow

Quick Install

Automated & IDE Setup

Copy the AI prompt to install this server into Claude Code, Cursor, or another agent — or use 1-click editor setup below.

Add to Cursor Add to VS Code

Manual Client & Custom JSON ConfigExpand JSON ▾

Client Config & Setup

Remote HTTP

Choose your client or environment

Target File:~/Library/Application Support/Claude/claude_desktop_config.json

claude_desktop_config.json

{
  "mcpServers": {
    "letmediff-mcp": {
      "url": "http://localhost:5173"
    }
  }
}

💡 Paste the JSON block into your client's configuration file under mcpServers, then restart the application.

Documentation Overview

letmediff

letmediff is a review handoff tool for agent-driven coding sessions.

The CLI runs as an MCP server inside a local repository, captures the current worktree diff, and posts it to the web app. The web app renders the diff at a shareable URL and sends reviewer feedback back to the MCP client over server-sent events.

Workspace

This repository is a pnpm monorepo.

packages/letmediff contains the letmediff MCP CLI.
apps/letmediff.it contains the SvelteKit app that stores, renders, and streams diff feedback.

Requirements

Node.js compatible with the package dependencies
pnpm ^11.2.2

Install

pnpm install

Local Development

Run the app:

pnpm --filter letmediff.it dev

Run the MCP server against the local app by setting URL:

URL=http://localhost:5173 pnpm --filter letmediff exec letmediff

When used by an MCP-compatible agent, the server exposes tools to create named checkpoints, create a hosted diff URL, and wait for reviewer feedback.

How It Works

The MCP server snapshots the repository when it starts.
The agent can create named checkpoints while it works.
When a review URL is requested, the server sends the collected checkpoint diffs to the app.
The app renders /diff/[id] and keeps an /events/[id] SSE connection open.
Submitted feedback is streamed back to the MCP server so the agent can continue from the review notes.

Package READMEs

CLI: packages/letmediff/README.md
App: apps/letmediff.it/README.md

Read the full README →View source on GitHub →

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Frequently Asked Questions about Letmediff MCP

Add the following block to your claude_desktop_config.json under mcpServers: "mcpServers": { "letmediff-mcp": { "command": "npx", "args": ["-y", "Letmediff MCP"] } }

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More in 💻 Developer Tools →Best MCP servers for Developers →Alternatives to Letmediff MCP →Install in Claude Desktop Install in Cursor Install in VS Code