PQM.guide
freeCommunity-driven Power Query M language reference documenting 661 M functions with syntax, examples, and best practices, plus an interactive M formatter, a REST API, and an MCP server for AI assistants.
- Category
- semantic-modeling
- Type
- web-app
- Language
- TypeScript
- Maintainer
- community
- Author
- Kyle A. Mueller
- Added
- Jun 18, 2026
What it does
PQM.guide is a community-driven reference for the Power Query M language, in the spirit of DAX.guide for M. It documents 661 M functions across 26 categories with syntax references, parameters, visual output examples, and best practices, alongside 22 concept guides covering M fundamentals (lazy evaluation, query folding, the type system, and more) and 18 practical pattern recipes graded from beginner to advanced. Beyond the reference site, it exposes machine-readable endpoints: a REST API for functions, concepts, patterns, fuzzy search, and sample tables; an llms.txt index for LLM crawlers; an interactive Format M endpoint that formats or validates M snippets; and an MCP server so AI assistants like Claude and Cursor can query M documentation directly over Streamable HTTP.
Why use it
Use it as a fast, searchable reference while writing Power Query M, whether in Power BI, Fabric dataflows, or elsewhere, and to give AI coding assistants grounded, up-to-date M documentation through the MCP server. The interactive formatter and validator help clean up and check M snippets without leaving the browser.
Getting started
Browse the reference at pqm.guide, or start with the curated learning path at /learn. To connect an AI assistant, add the MCP server (https://pqm.guide/api/mcp) to your client, for example via npx mcp-remote in claude_desktop_config.json. The site and its content are open source under the MIT license, and contributions (most content is MDX) are welcome through the repository.
