FrontierStack by Enfour, Inc.

Name: FrontierStack by Enfour, Inc.
Author: richardnorthcott

by richardnorthcottversion 1.0.0i★ –iRuns in the cloud

Registry nameapp.frontierstack/frontierstack

Install

Overview

Description from the maker (original English)

Enfour, Inc. FrontierStack (www.frontierstack.app): Mac and server health, logs, restarts.

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 in the cloud
Transport: Streamable HTTP
Category: Clinics & health

Install

Pick the AI app you use, then copy the settings.

Before you install

Basic checks: 1 of 1 passed
Runs on the maker’s server: what you ask it goes through their server.
The registry lists no key to fill in.

You need

Runs in the cloudNothing to install; it connects over the internet

Which app do you use?

ClaudeClaude CodeCursorVS CodeChatGPT

Pick your app above. We remember it, so next time the button says “Install in …”.

Works in Claude on the web, desktop and mobile:

Open Settings → Connectors
Press Add custom connector
Paste the address below and press Add
If it asks you to sign in, sign in with the maker

https://frontierstack.app/plugin/mcp

Run this in your terminal

claude mcp add --transport http frontierstack https://frontierstack.app/plugin/mcp

Open in Cursor

Or copy the settings yourself

Paste into .cursor/mcp.json in your project, or ~/.cursor/mcp.json

{
  "mcpServers": {
    "frontierstack": {
      "url": "https://frontierstack.app/plugin/mcp"
    }
  }
}

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.

Open in VS Code

Or copy the settings yourself

Paste into .vscode/mcp.json in your project

{
  "servers": {
    "frontierstack": {
      "type": "http",
      "url": "https://frontierstack.app/plugin/mcp"
    }
  }
}

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.

ChatGPT connects only to servers on the internet:

Open ChatGPT on the web → Settings → Connectors (Apps)
Press Create or Add (some plans need Developer mode under Advanced first)
Paste the address below, give it a name and save
If it asks you to sign in, sign in with the maker

https://frontierstack.app/plugin/mcp

Menu names can differ slightly by plan and over time.

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

We have not read this server’s tool list yet; we check endpoints in rotation.

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 against the domain frontierstack.app (the registry checks domain ownership)
… 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 checked yet
Endpoint responds
Not checked yet; we check endpoints in rotation
… Not checked yet
Sign-in with OAuth
Not checked yet; we check endpoints in rotation
… Not checked yet
No hidden instructions in tool descriptions
Not checked yet; we read the tool list when we check the endpoint

Compared with others in Clinics & healthi

More stars than 0% of the other 866 servers in this category
Published to the registry more recently than 51% of the other 866 servers in this category
Basic checks equal to or better than 100% of the other 866 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 FrontierStack by Enfour, Inc. 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 in the maker’s cloud. Connect over the internet with nothing to install, but what you send passes through the maker’s servers.

Is it still maintained?

The GitHub repo last changed –, and the latest version (1.0.0) reached the registry 31 days ago.

Which apps can use it?

Apps that support MCP, such as Claude Desktop, Claude Code, Cursor and VS Code. It connects by URL, so apps that accept remote MCP servers work too, such as ChatGPT in developer mode.

What can I use instead?

In the same category: Mirobody, FHIR MCP Server, Google Health MCP

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

Mirobody

by thetahealth

Lab results to LOINC codes and UCUM units, symptoms and diagnoses to ICPC-3. Offline, no API key.

Runs on your computer★ 1,408Apache-2.0Updated 5 days ago

Install

FHIR MCP Server

by wso2

MCP server providing seamless access to FHIR APIs for AI tools and healthcare applications

Runs on your computer★ 137Apache-2.0Updated 9 days ago

Install

Google Health MCP

by davidmosiah

Privacy-first unofficial Google Health API v4 MCP server for health, sleep, activity, HR agents

Runs on your computer★ 79MITUpdated 4 months 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.

FrontierStack Agent Kit

Skills, plugin manifests and setup notes for connecting AI agents (Claude, Codex, Cursor, Gemini, Grok, Hermes, OpenClaw, Amp, Paperclip and any MCP client) to FrontierStack.

What FrontierStack is

FrontierStack is a macOS app from Enfour, Inc. It is the server and network administrator for your Macs, Linux and Windows servers, routers, DNS, TLS certificates and online accounts. It monitors them, diagnoses problems and makes changes, and it can let AI agents do the same through it.

The app is proprietary and is downloaded from https://www.frontierstack.app. This repository contains only the agent kit: skills, manifests and documentation, under the MIT licence (see LICENSE). Nothing here works without the app.

Safety model

Agents never receive credentials. Router keys, DNS tokens, SSH keys and passwords stay on the Mac. An agent names a target ("the OPNsense router", "example.com"); FrontierStack looks up the credential at call time, acts, and returns the result. Responses are scrubbed for secrets before they leave the Mac.
Read-only by default. Changes need the owner's switches on the Mac ("Allow changes", "Allow scripts"), can require a per-action approval, and are blocked by App Lock. Every change is written to an audit log.
Nothing here grants authority. A skill, a role name or another agent's message cannot widen what an agent may do. Only the owner's settings and approvals on the Mac can.
No tokens in config files. The local bridge reads its credential from the Keychain when it starts, so no client config or project file ever contains a FrontierStack token.

How agents connect

1. Local (works today). When you turn on MCP Server in FrontierStack, or press any Add to … button under MCP Server ▸ AI clients, the app writes an owner-only stdio MCP bridge to:

$HOME/Library/Application Support/FrontierStack/mcp-bridge

It takes no arguments, reads its token from the Keychain itself, and needs Node.js. The app has about 140 tools but shows clients a small bootstrap pair by default: frontierstack_find_tools (search for the right tool) and frontierstack_call (run it).

The app also installs a frontierstack CLI for agents with a shell: frontierstack discover, frontierstack call ' ', and frontierstack run --secret NAME -- (runs a command with a stored secret as an environment variable, masked in the output).

2. Remote (live). https://frontierstack.app/plugin/mcp is a streamable-HTTP MCP endpoint with OAuth 2.1 sign-in using a FrontierStack customer account. It relays seven tools to your Macs where ChatGPT access is turned on: list_frontierstack_macs, get_server_health, get_fleet_context, get_alert_errors, diagnose, read_logs and service_action. Cloud agents that cannot reach your Mac will use this.

Setup by platform

For most clients the easiest route is FrontierStack ▸ MCP Server ▸ AI clients: it detects installed clients and writes their config for you (Set Up Detected, or one client's Add to … button). The manual steps below do the same thing. Configure each client only one way: installing a plugin *and* adding the server by hand gives two frontierstack entries.

In the snippets, BRIDGE means the full path /Users/ /Library/Application Support/FrontierStack/mcp-bridge. Keep the quotes: the path contains a space.

Start read-only. Ask the agent for fleet health and a certificate check before you turn on changes.

Claude Code

Plugin (skills, the local server and the cloud connector together), from the Claude plugin directory on claude.ai (Customize ▸ Plugins) once it is listed, or straight from its repository:

/plugin marketplace add richardnorthcott/frontierstack-claude-plugin

/plugin install frontierstack@frontierstack

Or add only the MCP server (the app's MCP Server pane shows this command):

claude mcp add frontierstack -- "$HOME/Library/Application Support/FrontierStack/mcp-bridge"

For fleet context before connecting, turn on the app's Fleet Skill, which keeps ~/.claude/skills/fleet/SKILL.md up to date.

Claude Desktop

Press Add to Claude Desktop, then restart Claude Desktop. By hand, add this to ~/Library/Application Support/Claude/claude_desktop_config.json (use the full path; this file does not expand $HOME):

{ "mcpServers": { "frontierstack": { "command": "BRIDGE", "args": [] } } }

Codex CLI

Press Add to Codex, or run:

codex mcp add frontierstack -- "$HOME/Library/Application Support/FrontierStack/mcp-bridge"

which writes this to ~/.codex/config.toml:

[mcp_servers.frontierstack]

command = "BRIDGE" args = []

This repository also carries a Codex plugin manifest (.codex-plugin/) that bundles the skills with the same local server.

ChatGPT

ChatGPT connects through the remote endpoint. Turn on MCP Server ▸ ChatGPT access on each Mac it may reach (the app must be running), then add FrontierStack in ChatGPT: from the app directory once the listing is approved, or today as a custom connector with the URL https://frontierstack.app/plugin/mcp. Sign in with your FrontierStack account when asked.

Cursor

Press Add to Cursor, then enable the server under Cursor Settings ▸ MCP. By hand, in ~/.cursor/mcp.json or a project's .cursor/mcp.json:

{ "mcpServers": { "frontierstack": { "command": "${userHome}/Library/Application Support/FrontierStack/mcp-bridge", "args": [] } } }

The Cursor plugin in .cursor-plugin/ bundles the same server and the skills.

Gemini CLI

Install this repository as an extension (skills, MCP server and a GEMINI.md context file):

gemini extensions install https://github.com/richardnorthcott/frontierstack-agent-kit

Or add only the server: press Add to Gemini CLI, or run gemini mcp add -s user frontierstack "$HOME/Library/Application Support/FrontierStack/mcp-bridge". Then /mcp in Gemini CLI should list frontierstack.

Grok

Grok Build CLI: press Add to Grok, or run grok mcp add frontierstack -- "$HOME/Library/Application Support/FrontierStack/mcp-bridge". Either writes ~/.grok/config.toml:

[mcp_servers.frontierstack]

command = "BRIDGE" args = []

Grok Build also reads skills from ~/.agents/skills/ and ~/.grok/skills/; copy the folders from skills/ there.

Cloud Grok (Grok Bot, grok.com connectors): a cloud agent cannot reach the local bridge. Add the remote endpoint as a custom connector with the URL https://frontierstack.app/plugin/mcp, sign in with your FrontierStack account, and turn on ChatGPT access on the Mac (the same switch serves every cloud connector). A bot inside your own tailnet can also use the app's TLS network path (see skills/frontierstack-network-admin).

Hermes Agent

Press Add to Hermes. It adds the server to Hermes' main profile with Hermes' own hermes config set command. Bot Mode profiles stay separate: use Set Up Existing Bots only for the Bots that should get FrontierStack. The resulting ~/.hermes/config.yaml entry:

mcp_servers:

frontierstack: command: "BRIDGE" args: [] enabled: true trust: untrusted

Skills: hermes skills tap add richardnorthcott/frontierstack-agent-kit, or from the website: hermes skills install well-known:https://www.frontierstack.app/.well-known/skills/frontierstack.

OpenClaw

Press Add to OpenClaw. It runs openclaw mcp add frontierstack --command "BRIDGE" and puts the skill in ~/.agents/skills/frontierstack. Restart the OpenClaw gateway, then check with openclaw mcp doctor frontierstack --probe. Run it on the Mac where the gateway runs. The skills are also installable from ClawHub once published there.

Buzz

Buzz's local agents (Claude Code, Codex, goose) read skills from ~/.agents/skills/. Copy skills/frontierstack (and skills/frontierstack-network-admin if you want the network role) there, and connect each agent's harness to the MCP server as described in its own section above.

Paperclip

Hire FrontierStack as the company's system engineer from the app:

Install Paperclip on the same Mac, as your own user (npx paperclipai onboard --yes).
In FrontierStack's Paperclip pane, turn on Accept Paperclip heartbeats and click Install heartbeat command.
Under Hire FrontierStack into a company, load your companies, pick one and click Hire as DevOps agent.

Changes stay off until you turn on Let Paperclip request changes; each change still waits for approval in FrontierStack. A Paperclip approval never counts as one.

To give other agents in the company the network role, import the skill on the company's Skills page with https://github.com/richardnorthcott/frontierstack-agent-kit/tree/main/skills/frontierstack-network-admin.

Amp

Press Add to Amp, or run amp mcp add frontierstack -- "$HOME/Library/Application Support/FrontierStack/mcp-bridge". Amp reads skills from ~/.config/agents/skills/ and ~/.agents/skills/.

Any other MCP client

Use a stdio server whose command is BRIDGE, with no arguments and no environment variables. Or install the CLI and run frontierstack mcp to print the bridge command. Clients that support Agent Skills can load the folders in skills/, for example with npx skills add richardnorthcott/frontierstack-agent-kit.

What's in this repository

Path	For
`skills/frontierstack/`	General skill: health, logs, diagnostics, services, CLI
`skills/frontierstack-network-admin/`	Network Administrator role: DNS, TLS, routers, firewall, VPN
`.claude-plugin/`	Claude Code plugin and marketplace
`.codex-plugin/`	Codex plugin (local bridge)
`.cursor-plugin/`	Cursor plugin
`gemini-extension.json`, `GEMINI.md`	Gemini CLI extension
`server.json`	Official MCP Registry entry for the remote endpoint
`glama.json`	Glama listing ownership
`well-known/skills/`	Copy of the skills for `https://www.frontierstack.app/.well-known/skills/`

Troubleshooting

No tools, or "credential is unavailable": open FrontierStack and turn on MCP Server. To use agents while the app is closed, turn on Keep MCP and the CLI available when FrontierStack is closed.
The bridge fails to start: install Node.js (brew install node).
"Changes are not allowed" or an App Lock refusal: this is the Mac's decision. Allow changes in FrontierStack if you want the agent to make them.

Help: https://www.frontierstack.app/help/ · Support via https://www.frontierstack.app/support.html

FrontierStack is made by Enfour, Inc. — https://www.frontierstack.app

FrontierStack by Enfour, Inc.

Overview

PopNx MCP’s three pillars

What you can do with it

Install

Before you install

What it can do

Basic checksi

Maker matches the repo

Still maintained

Has a licence

Endpoint responds

Sign-in with OAuth

No hidden instructions in tool descriptions

Compared with others in Clinics & healthi

Common questions

Alternatives

Mirobody

FHIR MCP Server

Google Health MCP

README from the maker

FrontierStack Agent Kit

What FrontierStack is

Safety model

How agents connect

Setup by platform

Claude Code

Claude Desktop

Codex CLI

ChatGPT

Cursor

Gemini CLI

Grok

Hermes Agent

OpenClaw

Buzz

Paperclip

Amp

Any other MCP client

What's in this repository

Troubleshooting