MindNode MCP Server

Connect MindNode to Claude and any AI agent — an MCP server for the mind-mapping app that has no API, no AppleScript, and no exportable files.

MindNode Next (the 2024+ generation of MindNode) moved all documents into a private SQLite/CRDT library and ships zero automation surface: no AppleScript dictionary, no CLI, no cloud API, not even .mindnode files on disk anymore. This project reverse-engineered the storage format so AI agents can finally read and create mind maps:

• Read any mind map as a Markdown outline — straight from MindNode's local library (SQLite → protobuf → Apple LZ4 → CRDT decode), read-only, without even launching the app.
• See the exact rendered map — MindNode's own preview JPEGs, pixel-perfect.
• Create new mind maps from Markdown outlines (silent in-app import).
• Open any map by name via the mindnode:// URL scheme.

Works with Claude Code, Claude Desktop, and any MCP client.

Looking for the classic file-based MindNode? Older plist-based tools cover .mindnode documents; this server is for MindNode Next (2024+), the SQLite-library generation where those approaches no longer work. Verified on MindNode 2026.4.4.

Tools

tool	what it does
list_mindmaps	list all mind maps in the library (title, id, modified)
get_mindmap	read a mind map as a Markdown outline (best-effort CRDT decode)
get_mindmap_image	MindNode's own rendered JPEG preview — pixel-perfect ground truth
create_mindmap	create a new mind map from a Markdown outline (imports via the app)
open_mindmap	open a mind map in MindNode

Install

Requires macOS with MindNode 2024+ and Node.js ≥ 24.

Claude Code:

claude mcp add --scope user mindnode -- npx -y mindnode-mcp

Claude Desktop / any MCP client (claude_desktop_config.json):

{
  "mcpServers": {
    "mindnode": {
      "command": "npx",
      "args": ["-y", "mindnode-mcp"]
    }
  }
}

From source (Node ≥ 24 runs the TypeScript directly, no build step):

git clone https://github.com/jyuwaaw/mindnode-mcp.git
cd mindnode-mcp && npm install
claude mcp add --scope user mindnode -- node /path/to/mindnode-mcp/src/index.ts

Debug with the MCP inspector: npm run inspect.

How I use it

I keep a daily mind map (one per day, plus per-project maps) as my working memory — Raycast is set up to summon MindNode with a single keystroke, so capturing a thought costs nothing. This server closes the loop: at the end of the day an agent reads the map, turns it into a work log or blog draft, and can seed tomorrow's map from open threads. Ask Claude things like:

• "list my mind maps"
• "read today's map and draft a standup update"
• "turn this outline into a mind map: …"

How it works

MindNode Next stores everything in a GRDB/SQLite library inside its sandbox container. Each document is a protobuf base snapshot plus a stream of CRDT operation batches, both wrapped in a tiny envelope (field 12345 = version, field 678910 = payload — yes, really) and compressed with Apple's LZ4 framing (bv41/bv4-/bv4$ blocks).

This repo carries a schema-less protobuf parser, a pure-TypeScript Apple-LZ4 decoder, and a tree reconstructor that replays node-creation and text ops. The full reverse-engineering notes live in docs/FORMAT.md — if you want to build your own MindNode tooling, start there. tools/spelunk.py pretty-prints any library blob for further digging.

Writes deliberately do not touch the database (it's CloudKit-synced; corrupting it would be unforgivable). New documents go through MindNode's own Markdown importer via open -a MindNode, which is silent and lossless.

Caveats

• get_mindmap reconstructs text from a CRDT op stream whose position encoding isn't fully mapped: heavily edited strings can come back slightly scrambled, and deleted nodes may linger as (untitled). Use get_mindmap_image when exactness matters. Documents created via create_mindmap read back losslessly.
• create_mindmap launches MindNode (import happens in-app, silently). It always lands the new document at the library root — targeting a folder needs the App Intents route (see Roadmap) — and MindNode auto-renames the document when the title already exists (the central node keeps the title you asked for). There is no tool yet for adding nodes to an existing map, renaming, or deleting.
• If an import produces nothing, check MindNode itself: a modal dialog in the app blocks every subsequent open/import, and open still exits 0. Only Markdown imports work this way — MindNode registers as a viewer for OPML, FreeMind and TaskPaper, but opening those files is silently ignored.
• The library is read read-only, always. Format verified on MindNode 2026.4.4; a future MindNode update could shift field numbers — file an issue with tools/spelunk.py output if outlines come back empty.

Roadmap

• Node-level edits (add/rename/delete a single node) and lossless export via MindNode's 20 App Intents (CreateNode, EditNode, ExportDocument, …) wrapped in Shortcuts
• Map the CRDT text-position encoding and deletions for exact reads
• Folder titles, tags/stickers, notes fields

License

MIT