Inspect, refactor, lint, run and version Power Query (M) in Excel workbooks and Power BI projects.
Connect Runs on your machine
claude mcp add letin -e LETIN_HOME=<LETIN_HOME> -- uvx letin==0.2.0
{
"mcpServers": {
"letin": {
"command": "uvx",
"args": [
"letin==0.2.0"
],
"env": {
"LETIN_HOME": "<LETIN_HOME>"
}
}
}
}
{
"mcpServers": {
"letin": {
"command": "uvx",
"args": [
"letin==0.2.0"
],
"env": {
"LETIN_HOME": "<LETIN_HOME>"
}
}
}
}
{
"servers": {
"letin": {
"type": "stdio",
"command": "uvx",
"args": [
"letin==0.2.0"
],
"env": {
"LETIN_HOME": "<LETIN_HOME>"
}
}
}
}
Replace the values in angle brackets with your own. Keys stay on your machine; we never see them.
Tools
This server runs locally, so its tools are listed by your MCP client once it starts.
Environment variables
| Name | Description |
|---|---|
LETIN_HOMEOptional | Folder for query snapshots. Defaults to %LOCALAPPDATA%\letin. |
Details
| Package | [email protected] (PYPI, stdio) |
| First published | 22 Sep 2026 |
| Last updated | 22 Sep 2026 |
| Registry name | io.github.S-CurveLabs/letin |
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