Puter MCP
Puter MCP enables AI tools to interact with Puter: manage files, websites, workers, and more
Runs in the cloud✓ service owner · puter.com
Klass Personal OS
What it does
Mac app that runs Claude or Codex on a schedule against your mail, calendar, and files.
- Connects Runs on your computer
- Account or key No key needed
- Category Docs, sheets & office work
Install
Pick the AI app you use, then copy the settings.
Passed 2/3 checks · Runs on your computer
First: which AI do you use?
Pick your app and the steps appear below.
Works with Claude, with some setup first
No key, nothing to install · Only the Claude desktop app (Windows or Mac), not the web or phone
Download the maker’s installer
Download the maker’s .mcpb file
The .mcpb file comes straight from the maker; we do not change it
Double-click the file, then click Install in the Claude desktop app
Try it
Use Klass Personal OS and tell me what you can do for me, then show me one thing✓ If Claude says it is using Klass Personal OS or shows a Klass Personal OS tool in the answer, you are connected
Menu names checked against Anthropic’s help page on Nov 11, 2026 · your screen may differ slightly by app version
ChatGPT cannot connect Klass Personal OS yet
Klass Personal OS runs on your computer, but ChatGPT can only connect servers that run on the web
What you can do instead
A · Use an app that can connect Klass Personal OS
- No key, nothing to install · Only the Claude desktop app (Windows or Mac), not the web or phone
Claude Code cannot connect Klass Personal OS yet
The maker only provides an installer for the Claude desktop app
What you can do instead
A · Use an app that can connect Klass Personal OS
- No key, nothing to install · Only the Claude desktop app (Windows or Mac), not the web or phone
Cursor cannot connect Klass Personal OS yet
The maker only provides an installer for the Claude desktop app
What you can do instead
A · Use an app that can connect Klass Personal OS
- No key, nothing to install · Only the Claude desktop app (Windows or Mac), not the web or phone
VS Code cannot connect Klass Personal OS yet
The maker only provides an installer for the Claude desktop app
What you can do instead
A · Use an app that can connect Klass Personal OS
- No key, nothing to install · Only the Claude desktop app (Windows or Mac), not the web or phone
At a glance
- Downloads per weeki
- Not on npm/PyPI
- Connection
- Runs on your computer
- Latest versioni
- 1.2.0
- Categoryi
- Docs, sheets & office work
- Published to registryi
- Oct 19, 2026
- Code last changedi
- Oct 19, 2026
- Maker
- KlassyCoder
- Packages
mcpb: …/klass-personal-os-mcp-1.2.0.mcpb- Website
- coreyklass.com
- Registry status
- Active
Which apps can use it
Based on how this server connects and on each app’s own docs, checked Nov 10, 2026.
Run on your computer in
ClaudeGooseLM StudioMsty StudioCherry StudioVisual StudioWindsurf (Devin Desktop)ZedKiroClineContinueJetBrains AI AssistantCodex CLIGemini CLIOpenCodenodecodeWarpLibreChatRaycast
Related guides
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 13, 2026
- ✓ Pass
Maker matches the repo
The registry name was verified with the GitHub account KlassyCoder, which owns the repo
- ✓ Pass
Still maintained
Code last changed 25 days ago
- ✕ Fail
Has a licence
No licence file found in the repo
- – 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
Discussion
Ask, share a tip or report that it does not work. Sorted by what people marked helpful.
No posts yet. Be the first to ask or share.
Posts here are written by users, not the PopNx team.
User reviews
No reviews yet
Compared with others in Docs, sheets & office worki
- More stars than 0% of the other 3820 servers in this category
- Published to the registry more recently than 55% of the other 3820 servers in this category
- Basic checks equal to or better than 47% of the other 3820 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 2 of 3 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 25 days ago, and the latest version (1.2.0) reached the registry 25 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: Puter MCP, XcodeBuildMCP, XcodeBuildMCP
Others in the same category
Servers in the same category from other makers, sorted by stars.
Reading a card:↓ Downloads per weeki★ GitHub starsiThree pillars: reviews · checks · usageiUpdated = latest version published to the registryi
XcodeBuildMCP
XcodeBuildMCP provides tools for Xcode project management, simulator management, and app utilities.
Runs on your computer✓ service owner · xcodebuildmcp.com
XcodeBuildMCP
XcodeBuildMCP provides tools for Xcode project management, simulator management, and app utilities.
Runs on your computer
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.