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GitHub Style Markdown Preview MCP App

by soukadao
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TypeScript
Remote

GitHub Style Markdown Preview MCP App

GitHub Flavored Markdown (GFM) preview as an MCP App.

Docs: https://modelcontextprotocol.io/docs/extensions/apps

Usage

npm run build    # Build UI and server
npm run serve    # Start server on http://localhost:3001/mcp
npm run dev      # Build & serve with watch mode

Related MCP server: GitHub MCP Server

Connect to Claude

  1. Start the tunnel:

    npx cloudflared tunnel --url http://localhost:3001

  2. Copy the generated URL (e.g., https://random-name.trycloudflare.com)

  3. In Claude web, go to Settings > Connectors > Add custom connector

  4. Enter the URL with /mcp path:

    https://<your-url>.trycloudflare.com/mcp

Packages

Dependencies

Package

Description

@modelcontextprotocol/ext-apps

MCP Apps SDK (server + client)

@modelcontextprotocol/sdk

MCP SDK core

react, react-dom

React UI framework

react-markdown

Markdown renderer for React

remark-gfm

GitHub Flavored Markdown plugin

github-markdown-css

GitHub style CSS

express, cors

HTTP server

zod

Schema validation

Dev Dependencies

Package

Description

vite

Build tool

vite-plugin-singlefile

Bundle into single HTML

@vitejs/plugin-react

Vite React plugin

esbuild

Server bundler

concurrently

Run multiple commands

cross-env

Cross-platform env vars

tsx

TypeScript execution

typescript

TypeScript compiler

Files

File

Description

main.ts

Entry point (HTTP/stdio transport)

server.ts

MCP server with preview-markdown tool

mcp-app.html

UI entry point

src/mcp-app.tsx

React app using useApp hook

src/markdown.tsx

Markdown component with GFM support

src/global.css

GitHub markdown styling

vite.config.ts

Vite bundler config

tsconfig.json

TypeScript config

tsconfig.server.json

Server build config

This server cannot be deployed

One endpoint for every MCP toolRayrun runs every MCP server behind one URL and holds the credentials. Each call is decided per client, tool, and argument, then recorded.ray.runAd

Maintenance

ActivityInactive
ResponsivenessNo issues

Resources

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