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
Klass Personal OS
Overview
Description from the maker (original English)
Mac app that runs Claude or Codex on a schedule against your mail, calendar, and files.
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: Runs on your computer
- Transport: stdio
- 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.
Which app do you use?
Pick your app above. We remember it, so next time the button says “Install in …”.
Download the maker’s .mcpb file
The link goes to the maker’s own file; we do not host or repackage it. Open the file and Claude Desktop installs it.
Run this in your terminal
Your browser asks to open the app, then the app shows the settings and asks you to confirm. Key values are left empty for you to fill in.
Your browser asks to open the app, then the app shows the settings and asks you to confirm. Key values are left empty for you to fill in.
This one runs on your computer, and ChatGPT can only connect to servers on the internet. Pick another app.
Your choice stays on this device in a cookie; no account needed.
These settings are generated from the maker’s registry entry. If the README says otherwise, follow the README.
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 with the GitHub account KlassyCoder, which owns the repo
- … 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 2186 servers in this category
- Published to the registry more recently than 62% of the other 2186 servers in this category
- Basic checks equal to or better than 100% of the other 2186 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 Klass Personal OS 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 (1.2.0) reached the registry 19 days ago.
Which apps can use it?
Apps that support MCP, such as Claude Desktop, Claude Code, Cursor and VS Code. You also need MCPB on your computer.
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 3 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.
Klass Personal OS
A native Mac app that runs Claude or Codex on a schedule, or the moment an email, text message, feed item, or file arrives, so the work happens whether or not a chat is open. Each assistant gets its own API key, scoped to the mail accounts, folders, calendars, and actions you choose.
Website and download: https://coreyklass.com/personal-os
mcp-name: io.github.KlassyCoder/klass-personal-os
What this repository is
This is the public distribution point for Klass Personal OS's MCP connector. The app itself is closed source and is downloaded from the website above. This repository holds:
- Releases: the Claude Desktop extension (
.mcpb), a small signed and notarized bridge that connects Claude Desktop to the app's local MCP server. - `server.json`: the listing for the official MCP Registry.
The extension does nothing without the app. Install the app first.
Getting started
- Download Klass Personal OS from https://coreyklass.com/personal-os and drag it to Applications. It needs macOS 14 Sonoma or later. No account, Node, or Python is required.
- Connect your mail, calendar, and the folders it may use in the app's settings window.
- Connect an AI client:
- Claude Desktop: the app's Claude Desktop settings have an Install Extension button. You can also download the
.mcpbfrom this repository's Releases and open it. Claude Desktop asks for an API key (issue one under API Keys in the app) and the app's MCP port. - Claude Code and other MCP clients: issue a key under API Keys and use Copy Claude Config to get a config to paste.
- Codex: the app's Codex settings have a Copy Manual MCP Template button.
Automations run the Claude Code or Codex CLI already installed on your Mac, with its own sign-in.
Security model
- Each assistant gets its own key, limited to the accounts, folders, and actions you name. Revoking one key never touches the others.
- Writing to mail, permanent deletes, and remote commands are each off until you turn them on, and an outbound mail account can hold every send for your approval.
- Synced mail and calendar data stay on your Mac, and passwords stay in the macOS Keychain.
- The MCP server listens only on your Mac unless you change that setting.
- No telemetry or analytics. The only call the app makes on its own is a once-daily update check you can turn off.
- The App Sandbox is off, because a sandboxed app can't launch the Claude or Codex CLI, and launching them on a schedule is the point of the app.
Full details: https://coreyklass.com/personal-os/security.html
Pricing
The free tier works against your real accounts, includes three automations, and has no time limit. Pro is a one-time license that raises the limits and adds a few tools. See https://coreyklass.com/personal-os for current pricing.
Support
Email info@coreyklass.com. Release notes: https://coreyklass.com/personal-os/release-notes.html
Copyright Klass Concepts LLC. All rights reserved.