Letin: Power Query (M) vs Excel Webview2 MCP

In-depth architectural comparison of the Letin: Power Query (M) and Excel Webview2 MCP MCP servers. Compare execution transports, security boundaries, tool capabilities, quality scores, and ready-to-paste client installation snippets for Claude, Cursor, Windsurf, and VS Code.

Which MCP Server Should You Choose?

L

Choose Letin: Power Query (M) when:

• You need dedicated capabilities in the Workplace & Productivity domain.
• You prefer local stdio subprocess transport architecture.
• Your security boundary fits: No auth required (Free / Open Source).

Explore Letin: Power Query (M) Details

Choose Excel Webview2 MCP when:

• You need dedicated capabilities in the Workplace & Productivity domain.
• You prefer local stdio subprocess transport architecture.
• Your security boundary fits: No auth required (Free / Open Source).

Explore Excel Webview2 MCP Details

Feature & Specification Comparison

Specification	L Letin: Power Query (M) Workplace & Productivity	Excel Webview2 MCP Workplace & Productivity
Summary	Inspect, refactor, lint, run and version Power Query (M) in Excel workbooks and Power BI projects.	MCP server for Excel add-ins via WebView2 CDP
Category & Scope	Workplace & Productivity	Workplace & Productivity

Tools & Capabilities Breakdown

Ready-to-Paste Client Configurations

Paste either (or both) of these JSON server blocks into your client config file (e.g. claude_desktop_config.json or ~/.cursor/mcp.json).

{
  "mcpServers": {
    "letin-power-query-m": {
      "command": "npx",
      "args": [
        "-y",
        "letin-power-query-m"
      ]
    }
  }
}

{
  "mcpServers": {
    "excel-webview2-mcp": {
      "command": "npx",
      "args": [
        "-y",
        "@dsbissett/excel-webview2-mcp@latest"
      ]
    }
  }
}

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