# Companion

> Your neighborhood friendly MCP utility for macOS, iOS, and visionOS

- **Type:** MCP server
- **Install:** `agentstack add mcp-mattt-companion`
- **Verified:** Yes — security-reviewed for prompt injection and unsafe behavior
- **Seller:** [mattt](https://agentstack.voostack.com/s/mattt)
- **Installs:** 0
- **Category:** [Integrations](https://agentstack.voostack.com/c/integrations)
- **Latest version:** 0.1.0
- **License:** MIT
- **Upstream author:** [mattt](https://github.com/mattt)
- **Source:** https://github.com/mattt/Companion
- **Website:** https://github.com/loopwork/Companion/releases/latest/download/Companion.zip

## Install

```sh
agentstack add mcp-mattt-companion
```

Requires the [AgentStack CLI](https://agentstack.voostack.com/docs/cli). Works with Claude Code, Cursor, and any MCP-compatible agent.

## About

# Companion

**Companion** is a utility for testing and debugging your MCP servers
on macOS, iOS, and visionOS.
It's built using the
[official Swift SDK](https://github.com/modelcontextprotocol/swift-sdk).

> [!IMPORTANT]  
> Companion is in early development and is still missing some important features,
> including authentication, roots, and sampling.
>
> For a more complete MCP debugging experience, check out the
> [MCP Inspector](https://modelcontextprotocol.io/docs/tools/inspector).

## Features

- [x] Connect to local and remote MCP servers
- [x] Easily browse available prompts, resources, and tools
- [x] Call tools, generate prompts with arguments, and download resources

## Getting Started

First, [download the Companion app](https://github.com/mattt/Companion/releases/latest/download/Companion.zip)
(requires macOS 15 or later).

Or, if you have [Homebrew](https://brew.sh) installed,
you can run the following command:

```console
brew install --cask mattt/tap/Companion
```

When you open the app,
you'll see a sidebar on the left and a placeholder view on the right.
Click the + button in the toolbar to add an MCP server.

> [!TIP]
> Looking for a fun MCP server?
> Check out [iMCP](https://iMCP.app/?ref=Companion),
> which gives models access to your Messages, Contacts, Reminders and more.
>
> Click on the iMCP menubar icon,
> select "Copy server command to clipboard",
> and paste that into the "Command" field for your STDIO server.

Once you add a server,
it'll automatically connect.
When it does, it'll show available prompts, resources, and tools.
Click on one of those sections to see a list, and drill into whatever you're interested in.
Or, select the parent item in the sidebar to get information about the server.

## Requirements

- Xcode 16.3+
- macOS Sequoia 15+
- iOS / iPadOS 16+
- visionOS 2+

## License

This project is available under the MIT license.
See the LICENSE file for more info.

## Legal

The app icon is a playful nod to [Finder](https://en.wikipedia.org/wiki/Finder_%28software%29) and
[Henohenomoheji](https://en.wikipedia.org/wiki/Henohenomoheji) (へのへのもへじ),
a face drawn by Japanese schoolchildren using hiragana characters.
Finder® is a trademark of Apple Inc.

This project is not affiliated with, endorsed, or sponsored by Apple Inc.

## Source & license

This open-source MCP server is cataloged on AgentStack and links to its original source — we do not rehost the code.

- **Author:** [mattt](https://github.com/mattt)
- **Source:** [mattt/Companion](https://github.com/mattt/Companion)
- **License:** MIT
- **Homepage:** https://github.com/loopwork/Companion/releases/latest/download/Companion.zip

Install and usage instructions live in the source repository linked above.

## Pricing

- **Free** — Free

## Security capabilities

Automated source analysis of v0.1.0 — what this tool can access:

- **Network access:** no
- **Filesystem access:** no
- **Shell / process execution:** no
- **Environment & secrets:** no
- **Dynamic code execution:** no

*"Yes" means the capability is present in the source — more access means more to trust, not that it is unsafe.*


## Versions

- **0.1.0** — security scan: passed — Imported from the upstream source.

## Links

- Listing page: https://agentstack.voostack.com/l/mcp-mattt-companion
- Seller: https://agentstack.voostack.com/s/mattt
- Browse the marketplace: https://agentstack.voostack.com/browse

---
Listed on AgentStack — the marketplace for AI agent skills and MCP servers. Every listing is security-reviewed. Creators keep 70%.