Monthlet

ai.monthletPublished by monthlet.aiv1.2.1Updated Nov 7, 2026

Read and edit the notes in your local monthlet vault from MCP clients. Runs inside the monthlet app.

VerifiedSTDIODesktop onlyFiles & Storage Knowledge & Memory

Server details

Identifier: ai.monthlet/monthlet
Transport: STDIO
Runtime: Desktop only
Trust: Verified
Published: Nov 7, 2026

Security note

MCP servers receive tool arguments from a conversation and may perform external actions. Review what a server can do before you enable it, and give it only the access it needs.

The registry verified that this server's namespace belongs to monthlet.ai. It runs from a package rather than a hosted endpoint, so there is no endpoint to match against that domain.

SourceWeft's checks cover whether the listing is complete and the endpoint answered; they do not review the server's code or what its tools do.

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Overview

AI-generated overview

Bridge that lets MCP clients search, read and optionally edit the notes in a local monthlet vault through the running monthlet app.

What you can do: Search, list and read notes, grep note contents, list folders, files and attachments, and follow backlinks
Read PDFs, images, files, chart data and sheet ranges from the vault
Create and update notes, edit note text, change tags, create folders and sheets, apply sheet edits, add attachments
Move and rename notes and folders
Delete notes and folders, or merge notes (deleted items go to the system trash)
When to use it: Useful when you keep notes in monthlet and want Claude Code, Claude Desktop or another MCP client to look things up in them, or to draft and file new notes, without copying text back and forth.
Requirements: monthlet for macOS or Windows must be installed and running, with its MCP server turned on in Settings under Connectors (Publish to external agents). Node.js 18 or later is needed for the stdio bridge, which has no other dependencies. The bridge reads a local connection file holding the port and access token, so no token goes into client configuration.

Before you install

Write, move/rename and delete capabilities are separate switches, all off by default; enabling them lets the assistant change or delete your notes, though deletions go to the system trash. Tool annotations mark read-only and destructive tools so clients can ask first. The bridge only relays to the app over localhost and sends nothing to the internet.

Installation

In SourceWeft

Open Monthlet in the dashboard and add it to a workspace.
Enable the server for the chats that should use its tools.

Desktop only via STDIO. STDIO servers start a local process, so they need the SourceWeft desktop host.

Other MCP clients

Follow the launch instructions in the repository.

README

monthlet MCP server

Use the notes in your monthlet vault from Claude Code, Claude Desktop and other MCP clients. Search and read notes, and, if you allow it, create and edit them.

The MCP server runs inside the monthlet app on your computer. This repository contains the small bridge that MCP clients start over stdio (monthlet-mcp.cjs). The bridge relays each message to the app over 127.0.0.1 and does nothing else. It sends nothing to the internet.

Requirements

monthlet for macOS or Windows, running
The MCP server turned on in monthlet: Settings > Connectors > Publish to external agents > Publish
Node.js 18 or later (the bridge has no other dependencies)

If monthlet isn't running, or the MCP server is off, every tool call returns an error that says so.

What the server can do

Reading is on as soon as you publish. Writing, moving and renaming, and deleting each have their own switch in the same settings section, and all three are off by default.

Switch	Tools
Publish (read only)	`search_notes`, `list_notes`, `read_note`, `grep_notes`, `list_folders`, `list_files`, `get_backlinks`, `list_attachments`, `view_image`, `read_pdf`, `read_file`, `read_chart_data`, `read_sheet_range`
Allow writing	`create_note`, `update_note`, `edit_note`, `update_tags`, `create_folder`, `create_sheet`, `apply_sheet_edits`, `add_attachment`
Allow moving and renaming	`move_note`, `move_folder`, `rename_note`, `rename_folder`
Allow deleting	`delete_note`, `delete_folder`, `merge_notes` (deleted items go to the system trash)

Every tool carries MCP tool annotations (readOnlyHint, destructiveHint), so clients can ask before running the ones that change your notes.

Install

Claude Code plugin

Install monthlet from the Claude plugin directory, or from this repository in Claude Code:

The plugin runs node ${CLAUDE_PLUGIN_ROOT}/monthlet-mcp.cjs.

Claude Code, by hand

Clone this repository, then:

On macOS you can also use the copy inside the app. monthlet shows the exact command in Settings > Connectors > Publish to external agents > Setup.

Claude Desktop and other clients

Add a stdio server that runs the bridge with Node.js. In Claude Desktop's claude_desktop_config.json:

json

{  "mcpServers": {    "monthlet": {      "command": "node",      "args": ["/path/to/monthlet-mcp/monthlet-mcp.cjs"]    }  }}

{  "mcpServers": {    "monthlet": {      "command": "node",      "args": ["/path/to/monthlet-mcp/monthlet-mcp.cjs"]    }  }}

On Windows, write the path with escaped backslashes, for example "C:\\Users\\you\\monthlet-mcp\\monthlet-mcp.cjs".

How it connects

While its MCP server is on, monthlet writes a connection file with the current port and access token to its user data folder, and deletes the file when it stops:

macOS: ~/Library/Application Support/monthlet/mcp-endpoint.json
Windows: %APPDATA%\monthlet\mcp-endpoint.json, or, for the Microsoft Store version, the same path inside %LOCALAPPDATA%\Packages\t27d.monthlet_*\LocalCache\Roaming

The bridge reads this file each time it connects, so the token never goes into your client's configuration, and regenerating the token in monthlet needs no change on the client side.

License

MIT. monthlet itself is not open source; this repository covers the bridge only.

Source: README.md at commit b11ef6f

Tools

SourceWeft has not started this package in its sandbox yet, so its tools are not known.

Version history

v1.2.1LatestNov 7, 2026

Score

50% of the applicable checks met

How complete this listing is, computed from the registry entry, the endpoint and public sources. Not a rating of the server and not a statement that it is safe or working today: reachability is a dated check, and no installs or reviews go into the score.

Reached in the last 30 days25 pts
Keep the endpoint answering the MCP handshake; SourceWeft probes it every 30 days.
Auth declared10 pts
Declare the credential headers in the registry entry, or keep the endpoint answering the probe so its auth can be classified.
Tools listed15 pts
Answer tools/list without a credential, or ship a package that starts in a sandbox without one.
DescriptionRequired15 pts
Logo10 pts
Documentation15 pts
License10 pts