@microtoll/mcp
Microtoll Engine inside your coding tool. A Model Context Protocol server (over standard input and output) that Claude Code, Cursor and any MCP host can call for the engine's documentation and for a project scaffold, so an agent can wire the engine in without leaving the editor — and without leaving the machine: the pages are inside the package, nothing is fetched, nothing runs but what is in src/.
Status: published as @microtoll/mcp on npm and listed in the MCP registry as io.github.microtoll/mcp. Apache-2.0. Zero dependencies (D-39). Node 24 or later.
Add it to a host
claude mcp add microtoll -- npx -y @microtoll/mcpAny other host takes the same command (npx -y @microtoll/mcp) as a stdio server.
The three tools
| Tool | What it does |
|---|---|
microtoll_search_docs({ query, limit? }) | Full-text search over the documentation — the same pages as microtoll.dev, shipped in generated/docs.json by the repository's docs build so they never drift. Returns page, section and excerpt. |
microtoll_read_doc({ path }) | One page as Markdown, by the path a search result gives (packages/access.html) or from llms.txt. |
microtoll_scaffold({ directory, namespace?, origin?, name? }) | Writes the notes starter into an empty directory: notes.js, page.js, index.html, docker-compose.yml, nginx.conf, package.json, README.md, with the namespace and origin filled in. Writes files and nothing else; refuses a directory that is not empty; never overwrites. The next steps (npm install, docker compose up) come back as text for the person to run. |
What it speaks
JSON-RPC 2.0, one message per line: initialize (protocol version 2025-06-18, tools capability), ping, tools/list, tools/call; notifications are acknowledged by silence; a tool's failure is a tool result with isError, a protocol failure a JSON-RPC error. About 120 lines in src/protocol.js, tested against a transcript of what a host sends.
Tests
npm test: the protocol over a real child process, the search and the page reader over the shipped snapshot, the scaffold into a temporary directory (placeholders filled, a non-empty directory refused).