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letin: Power Query (M)

Official registry Developer tools

Inspect, refactor, lint, run and version Power Query (M) in Excel workbooks and Power BI projects.

Source code

Install

Add this to your client's MCP configuration (Claude Desktop: claude_desktop_config.json; Cursor: .cursor/mcp.json; VS Code and others use the same "mcpServers" shape).

PYPI package letin
Claude Code 
claude mcp add letin-power-query-m -e 'LETIN_HOME=<LETIN_HOME>' -- uvx letin==0.2.0
JSON configuration (Claude Desktop, Cursor, VS Code) 
{
    "mcpServers": {
        "letin-power-query-m": {
            "command": "uvx",
            "args": [
                "letin==0.2.0"
            ],
            "env": {
                "LETIN_HOME": "<LETIN_HOME>"
            }
        }
    }
}

Environment variables

  • LETIN_HOME Folder for query snapshots. Defaults to %LOCALAPPDATA%\letin.

Frequently asked questions

What is letin: Power Query (M)?

Inspect, refactor, lint, run and version Power Query (M) in Excel workbooks and Power BI projects.

How do I install letin: Power Query (M)?

It runs on your machine. In Claude Code: claude mcp add letin-power-query-m -e 'LETIN_HOME=<LETIN_HOME>' -- uvx letin==0.2.0. For other clients, paste the JSON configuration from this page into their MCP settings.

Does letin: Power Query (M) need an API key?

Its registry entry lists no required key or secret. Some features may still need an account with the service it connects to.

Is letin: Power Query (M) open source?

Its code is public on GitHub, but the repository does not declare a standard license.

Who maintains letin: Power Query (M)?

It is published by S-CurveLabs. AI.tn lists it but does not maintain or endorse it.

From the official MCP Registry. Listing is not an endorsement: review a server's code and permissions before giving it access to your data.