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MCP server · Developer Tools

Companion

by · github.com/mattt/Companion

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

Unclaimed MIT last commit a year ago devtools
InstallView source
70Good

Scored 7 days ago · breakdown

About Companion

Companion is an MCP server published by mattt in the Developer Tools category: your neighborhood friendly MCP utility for macOS, iOS, and visionOS.

The repository has 187 stars and 9 forks, with the last commit a year ago. Six months or more without a commit doesn't mean the server is broken, but check the open issues before depending on it in production.

Install

From source
git clone https://github.com/mattt/Companion

This server has no ConduID identity, so agent calls to it are not receipted. Pin the version you install and review the source before granting it credentials.

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Security checks

Static checks derived from the repository 13 hours ago. Heuristics on the source, not an audit.

  • ✓README presentThe repository ships documentation.
  • ✓License declaredUsable under a stated license.
  • !Tests presentNo tests found. Behaviour changes may go unnoticed between versions.
  • !Dependencies pinnedNo lockfile. Installs can pull different code over time.
  • !Scoped permissionsDoesn't declare a permission scope. Assume it can do anything its process can.

1 check has not been run yet.

Releases

0.2.20.2.2 · 11 Jul 2025What's Changed Show sidebar items based on server capabilities, not prompt / resource / tool count by @mattt in https://github.com/loopwork/Companion/pull/7 Use URITemplate package for resource template evaluation by @mattt in…
0.2.10.2.1 · 2 Jul 2025What's Changed Persist servers in Application Support by @mattt in https://github.com/loopwork/Companion/pull/6 Full Changelog: https://github.com/loopwork/Companion/compare/0.2.0...0.2.1
0.2.00.2.0 · 2 Jul 2025What's Changed Add instructions for installing with Homebrew by @mattt in https://github.com/loopwork/Companion/pull/2 Add onboarding flow by @mattt in https://github.com/loopwork/Companion/pull/4 Improve functionality of resource…
0.1.20.1.2 · 30 Jun 2025Full Changelog: https://github.com/loopwork/Companion/compare/0.1.1...0.1.2
0.1.10.1.1 · 26 Jun 2025What's Changed Fix problems connecting to local MCP servers by @mattt in https://github.com/loopwork-ai/Companion/pull/1 New Contributors @mattt made their first contribution in https://github.com/loopwork-ai/Companion/pull/1 Full…

README

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.

Screenshot of Companion on macOS showing MCP tool detail

[!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.

Features

  • Connect to local and remote MCP servers
  • Easily browse available prompts, resources, and tools
  • Call tools, generate prompts with arguments, and download resources

Getting Started

First, download the Companion app (requires macOS 15 or later).

Or, if you have Homebrew installed, you can run the following command:

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, 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 and 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.

README fetched from the repository 13 hours ago. The original is authoritative.

Questions

About Companion

How do I install Companion?

No package has been published for this server, so install it from source: clone the repository and follow its README.

Is Companion safe to use with an AI agent?

Its trust score is 70 out of 100 (good). It passes 2 of the 5 static security checks run so far; the failures are listed above. It has no ConduID identity yet, so agent calls to it are not receipted.

Is Companion still maintained?

The last commit was a year ago. That's long enough that you should check whether the maintainer is responding to issues before depending on it.