Agent-Native Calendar
by BuilderIO
Agent-Native Google Calendar - manage events, sync, and public booking
Runs in the cloud★ 7,620MITUpdated 2 months ago
Install
Monthlet
Overview
Description from the maker (original English)
Read and edit the notes in your local monthlet vault from MCP clients. Runs inside the monthlet app.
PopNx MCP’s three pillars
These three are never merged into one score: opinions, measurements and popularity are different things.
- User voiceiNo reviews yetReviews open together with accounts in a later step
- Our basic checksi1 of 1 passedChecked from public information; code not scanned yet
- UsageiNot measured yet★ –
What you can do with it
We have not written a plain-language summary for this one yet. Below are the facts we read from the registry.
- Connection: –
- Transport:
- Category: Docs, sheets & office work
Install
Pick the AI app you use, then copy the settings.
Before you install
- Basic checks: 1 of 1 passed
- Runs on your computer with your user’s permissions (files, network, apps).
- The registry lists no key to fill in.
The maker has not listed install details in the registry. See the maker’s README below.
What it can do
Runs on your computer; the tool list appears in your AI app after you install it.
Basic checksi
We check information anyone can see; we have not read the code. Checks that do not apply are left out of the count. · Checked Nov 7, 2026
- ✓ Pass
Maker matches the repo
The registry name was verified against the domain monthlet.ai (the registry checks domain ownership)
- … Not checked yet
Still maintained
We have not read this repo from GitHub yet
- … Not checked yet
Has a licence
We have not read this repo from GitHub yet
- – Not applicable
Endpoint responds
This one runs on your computer; there is no internet endpoint
- – Not applicable
Sign-in with OAuth
Runs on your computer and uses local settings instead
- … Not checked yet
No hidden instructions in tool descriptions
Runs on your computer; we can only read tool lists from internet endpoints
Compared with others in Docs, sheets & office worki
- More stars than 0% of the other 2194 servers in this category
- Published to the registry more recently than 100% of the other 2194 servers in this category
- Basic checks equal to or better than 100% of the other 2194 servers in this category
Compared with every active server in this category in the registry. Stars count only when the publisher owns the repo.
Common questions
Is Monthlet safe?
It passed 1 of 1 applicable basic checks. We have not read the code. Before adding a key or token, see what access the server asks for and use a key with only the permissions you need.
What keys or codes does it need?
The registry does not list a required key, though some servers ask you to sign in on first use.
Does it run on my computer or in the cloud?
It runs on your computer. Your AI app starts it when needed, and data does not pass through the maker’s servers (unless it calls an online service itself).
Is it still maintained?
The GitHub repo last changed –, and the latest version (1.2.1) reached the registry today.
Which apps can use it?
Apps that support MCP, such as Claude Desktop, Claude Code, Cursor and VS Code.
What can I use instead?
In the same category: Agent-Native Calendar, Excel MCP Server, MCP Server for Excel
Alternatives
Servers in the same category from other makers, sorted by stars.
Reading a card:★ GitHub starsiThree pillars: reviews · checks · usageiUpdated = latest version published to the registryi
Excel MCP Server
by haris-musa
Lets AI create and edit Excel files itself, including formulas, charts and PivotTables, without Excel installed.
Runs on your computer★ 4,276MITUpdated 6 days ago
Install
MCP Server for Excel
by sbroenne
Excel automation for AI - Sheets, Power Query, DAX, VBA, Tables, Ranges and more. Windows only.
Runs on your computer★ 847MITUpdated 4 days ago
Install
README from the maker
Open the README
Copied from the maker’s repo as written. PopNx MCP has not reviewed or endorsed it. HTML, images and scripts are removed. Links lead off this site.
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:
/plugin install monthlet --marketplace t27d/monthlet-mcpThe plugin runs node ${CLAUDE_PLUGIN_ROOT}/monthlet-mcp.cjs.
Claude Code, by hand
Clone this repository, then:
claude mcp add --scope user monthlet -- node /path/to/monthlet-mcp/monthlet-mcp.cjsOn 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:
{"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.