MaBrain for Claude

Give your app a brain, from Claude Code. Add your docs, pages or a whole site; ask it and get answers that cite their source; fix what it gets wrong; plug it into your own agent with a few lines of code.

Every GitHub account gets a brain and 5 $ of free credit a month. Asking is free.

Install (Claude Code)

claude plugin marketplace add smtx/mabrain-plugin

claude plugin install mabrain@mabrain

Restart Claude Code, run /mcp, choose the mabrain server and sign in (Google, GitHub or your email). Then just ask Claude, for example: "add https://example.com/docs/ to my brain" or "what does my brain say about refunds?".

Claude Desktop and Cowork: Customize → Plugins → Add → Add marketplace → smtx/mabrain-plugin, install MaBrain, and connect it in the plugin's Connectors tab.

What you get

Skill	Use it to
/mabrain:add-source	Add a file, a page, or a whole site (crawled on your machine, previewed before anything is sent)
/mabrain:evaluate	Check which of your questions the brain answers
/mabrain:gaps	See what it could not answer, and fill it in
/mabrain:curate	Review and fix facts, one confirmed change at a time
/mabrain:connect-agent	Wire the brain into your own app or agent (Python, TypeScript, MCP)

Every answer comes with its source and a certainty from 0 to 1. When the brain does not know, it says so instead of guessing, and remembers the question so you can fill the gap.

Uploading files and crawling sites

The first time you upload a file or crawl a site, Claude runs the bundled crawler's login: your browser opens, you sign in (Google, GitHub or your email), and that machine stays signed in. No key to copy. The crawler (python3, no dependencies) sends the pages' literal HTML; nothing goes through a model on the way. If Claude Code runs sandboxed, allow the site's domain and api.mabra.in.

For your app

Your app uses a read key (mb_ro_…) and the API at https://api.mabra.in; /mabrain:connect-agent creates it for you and writes it into your project's .env without showing it. By default your agent asks without spending credit (mode: "search"). The full contract for models is at api.mabra.in/llms.txt, and ready-to-paste tool definitions at api.mabra.in/v1/tools. /mabrain:connect-agent writes the integration for you.

License

MIT