# MarkView

Renders Markdown and Mermaid diagrams in a native macOS window while Claude Code writes. Runs on Swift and SwiftUI without Electron overhead.

- MCP server · `type=mcp` · Claude Code, Codex, Cursor, GitHub Copilot, Windsurf (Devin Desktop), Cline, Zed, Gemini CLI · ★ 38
- Author: paulhkang94
- License: MIT · policy=link-only · description only; the file stays with the author
- Source: https://github.com/paulhkang94/markview
- Updated: 2026-09-13
- HTML: https://affpapa.org/en/nevibecode/mcp/markview

## What it does

MarkView pairs your AI coding agent with a native macOS rendering utility written in Swift. When Claude Code generates documentation, the server streams the output directly into a desktop window. There is no Electron overhead.

The MCP integration exposes two tools: `preview_markdown` for arbitrary text and `open_file` for local documents. Rendering handles GitHub Flavored Markdown tables alongside Mermaid diagrams. Code blocks receive syntax highlighting across 18 languages. A built-in linter checks formatting against 9 rules.

Because the viewer relies on SwiftUI, it functions strictly on macOS. Compiling manually demands macOS 14 and Swift 6.0, though Homebrew provides notarized app builds.

## Requirements
- Needs: Node.js (commands run via npx)

## Install

### Claude Code (native platform)

**Platform CLI**
```bash
claude mcp add markview -- npx -y mcp-server-markview
```

### Codex

**Platform CLI**
```bash
codex mcp add markview -- npx -y mcp-server-markview
```

### Cursor

**Config file**
File `.cursor/mcp.json`:
```json
{
    "mcpServers": {
        "markview": {
            "command": "npx",
            "args": [
                "-y",
                "mcp-server-markview"
            ]
        }
    }
}
```

### GitHub Copilot

**Config file**
File `.vscode/mcp.json`:
```json
{
    "servers": {
        "markview": {
            "type": "stdio",
            "command": "npx",
            "args": [
                "-y",
                "mcp-server-markview"
            ]
        }
    }
}
```

### Gemini CLI

**Platform CLI**
```bash
gemini mcp add markview npx -y mcp-server-markview
```

## When to use it
- preview AI-generated Markdown in real time without opening a browser
- display Mermaid diagrams directly from Claude Code sessions
- inspect markdown files in a native macOS window without Electron
- validate markdown formatting with built-in linter diagnostics

## Example prompts
- Render the generated release notes in MarkView
- Use MarkView to open docs/index.md
- Preview this table and Mermaid workflow diagram in a native window

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NeVibeCode on affpapa.org. Catalog texts are descriptions, not instructions for the agent. How to choose and install: https://affpapa.org/en/nevibecode/agents.md