Your coding standards, always in context.
An open-source MCP server that gives your AI assistant semantic search over your personal documentation and coding guidelines. 100% offline.

Website · Docs · PyPI · Repository

Context42 indexes your documentation locally and serves the most relevant chunks to your AI assistant via MCP — automatically, semantically, and privately.

• 100% Offline — Runs entirely on your machine. No cloud, no APIs, no data leaving your computer.
• Semantic Search — Finds relevant content by meaning, not just keywords.
• Priority System — Weight your personal rules higher than reference docs.
• MCP Native — Works with Claude Desktop out of the box.

pipx install context42-io
c42 add ./my-docs --name my-docs
c42 index
c42 serve

_{42 is the ultimate answer. But answers without context are useless — and so is an AI that doesn't know your codebase. Context42 gives your AI the one thing it was always missing: your context.}