Plug

One place on your Mac that holds every tool and gives it to every client.

Plug is a free Mac app for anyone who uses more than one AI client. Add your MCP servers, the programs that give an AI client tools like Slack, Notion, or your files, to Plug once. Claude, ChatGPT, Codex, Cursor, and every other client you use then get all of those tools, on this Mac or from your phone. Plug keeps the servers running, signs you in once, and shows you every call.

It lives in the menu bar. It is open source, with no account, no Docker, and no cloud service. Nothing can reach it from outside your Mac until you turn that on.

Every AI client keeps its own list of tools, in its own settings file, in its own format. Add Slack and you add it to Claude, then to Cursor, then to Codex. Each one starts its own copy and asks you to sign in again. When a new client comes out, you start over. And tools that only work on your Mac, like Messages or your files, are out of reach from your phone.

Plug is the one list. Your tools live with you, not inside any one client, so you can switch clients, or use five at once, and bring everything along.

Download Plug from Releases, move it to Applications, and open it. Or:

brew install --cask cyberpapiii/tap/plug-app

Plug needs macOS 14 or later. It keeps running in the background and updates itself.

Open Plug. The first run walks you through three steps:

1. Add a server. Bring over the ones your clients already use, or add a new one.
2. Connect a client. Pick Claude, Codex, Cursor, or another. Plug adds one entry for itself to that client's settings. Restart the client.
3. Use a tool. Ask your client to do something. The call shows up in Activity.

That is all. Every connected client now has every server.

The question mark in the toolbar opens these steps again. To have an agent set Plug up for you, give it docs/guides/agent-setup.md.

Use every client with the same tools. Claude Code in the morning, Codex in the afternoon, a new client tomorrow: each has every tool the moment you connect it.

Use your Mac's tools from anywhere. Servers for Messages, Contacts, Notes, and your files only work on your Mac. Give Plug a public address, for example through a tunnel, and ChatGPT or Claude on the web and on your phone can use them too. No client gets in until you approve it with Touch ID or a passkey. How to set it up.

Give each client only what it needs. Let your coding agent use GitHub and your docs but not your email. Each client has its own page with a switch for every server and tool.

Keep work and personal apart. A work Slack beside a personal one, or two Google accounts: add a second account to the same server.

See what your agents did. Activity lists every call: which client, which tool, how long it took, and whether it worked.

Hear about changes without asking. Point Plug at a tool, such as unread mail, and it tells a subscribed client when the result changes. For now this reaches only remote clients that support the newest version of MCP, and few do yet. More about events.

The menu bar panel says whether everything is working, has an on/off switch for Plug, and lists the latest tool calls. The window has four sections:

• Servers. Whether each is working, its sign-in, and its tools. Switch off any tool you do not want.
• Clients. Give each a name and an icon, and choose which servers and tools it may use.
• Events. Tell a client when something happens, so it does not have to keep asking.
• Activity. Which client called which tool, and how it went.

On this Mac. Plug sets these up for you: Claude Code, Claude Desktop, Codex, Cursor, VS Code Copilot, GitHub Copilot CLI, Gemini CLI, Zed, Warp, OpenCode, Goose, Cline, Kiro, Amp, Pi, and more. Any other client that speaks MCP works too; Plug gives you the settings to paste.

Over the network. ChatGPT and Claude on the web or phone reach Plug at an address you set up. The client signs in, and you approve it with a passkey. See docs/OPERATOR-GUIDE.md.

Everything the app does is also in the plug command, for agents and scripts. Add --output json to any command.

plug status     # Is Plug running, and does anything need you
plug servers    # The servers Plug holds
plug tools      # The tools those servers provide
plug clients    # The clients that use them
plug events     # Tell a client when a tool's result changes
plug doctor     # Check the whole setup and say what to fix

plug setup                      # Bring servers over and connect your clients
plug server add                 # Add one server
plug link                       # Connect a client
plug auth login --server slack  # Sign in to a server

plug help lists the rest.

What is MCP? The Model Context Protocol is how AI clients use outside tools. A server provides tools, such as "send a Slack message"; a client, such as Claude, calls them.

Does anything leave my Mac? Plug has no account and collects nothing. It checks GitHub for updates and fetches each server's icon from that service's website. Your servers talk to their own services, as they would without Plug. Nothing is reachable from outside your Mac until you set up remote access.

Does my Mac have to stay on? For clients on this Mac, no. For your phone or the web to reach Plug, yes: your Mac is where the tools run.

Is it for teams? No. Plug is a personal tool for one person's Mac. There are no organizations, roles, or hosted version.

Windows or Linux? No. Plug is a Mac app. The code builds on Linux, but nothing there keeps it running for you.

Where are its files? Settings are in ~/Library/Application Support/plug/config.toml, and logs in ~/Library/Logs/plug/. Most people never open the settings file; it is described in docs/SETTINGS.md.

Apache-2.0. See LICENSE.