box by Simular

Name: box by Simular
Author: simular-ai

by simular-aiversion 1.0.1i★ 1iRuns in the cloud

Registry nameai.simular/box

How to install

What it does

A cloud Linux desktop for your AI: browse, click, type, read the screen and run commands.

Connects Runs in the cloud
Account or key Sign in to the service when you connect (OAuth)
Category Developer tools

Install

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

Passed 4/4 checks · What you ask goes through the maker’s server (mcp.box.simular.ai) · ✓ Commands checked Nov 13, 2026

First: which AI do you use?

ClaudeWeb · app · phoneChatGPTWebClaude CodeTerminalCursorCode editorVS CodeCode editorOtherOther apps

Pick your app and the steps appear below.

Works with Claude · about 2 min

No key, nothing to install · Set it up once on claude.ai or the desktop app, then use it in chat · free accounts can add 1 · on Team/Enterprise an Owner adds it

Open Claude’s Connectors page
CustomizeConnectors
Done
Click “Add” → “Custom” → “Web” and fill in these 2 fields
Copy each value into the field with the same name in Claude, then click Continue
Name · Namebox by Simular
Remote MCP server URL · Addresshttps://mcp.box.simular.ai/mcp
Click Continue past the sign-in settings Claude detected · under Authentication choose what the maker says (Sign in now, Sign in when needed or No sign in), then click Add
Done
Turn it on in a chat
+Connectorsbox by Simular
Done
Try it
Use box by Simular and tell me what you can do for me, then show me one thing
✓ If Claude says it is using box by Simular or shows a box by Simular 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

Works with ChatGPT, depending on your plan

Full MCP: ChatGPT Business, Enterprise or Edu on the web · Pro: connects with read/fetch permissions, so tools that change data may not work · Plus: not confirmed in OpenAI’s docs; if you see an add-custom-MCP option on the Plugins page you can try these steps · web only

Open ChatGPT’s add-MCP page on the web
Plugins+Add custom MCP server
Done
Fill in the name and address
Enter a name, paste the address under Connection, tick the risk warning and click Create as a plugin
Name · Namebox by Simular
Connection · Addresshttps://mcp.box.simular.ai/mcp
Done
Pick box by Simular in a chat
Start a new chat and pick box by Simular from your plugins before typing
Done
Try it
Use box by Simular and tell me what you can do for me, then show me one thing
✓ If ChatGPT says it is using box by Simular or shows a box by Simular tool in the answer, you are connected

Menu names checked against OpenAI’s help page on Nov 11, 2026 · your screen may differ slightly by app version

Works with Claude Code · about 2 min

No key, nothing to install

Open Terminal
Mac: press Command+Space and type Terminal · Windows: open PowerShell
Done

Paste this command and press Enter

claude mcp add --transport http --scope user box https://mcp.box.simular.ai/mcp

Done

Type /mcp in Claude Code
You should see box by Simular listed as connected
Done
Try it
Use box by Simular and tell me what you can do for me, then show me one thing
✓ If Claude Code says it is using box by Simular or shows a box by Simular 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

Works with Cursor · about 2 min

No key, nothing to install

Click this button to open Cursor
Open in Cursor
Cursor asks you to confirm; click Install
Done
Open the AI chat in Cursor in Agent mode
Done
Try it
Use box by Simular and tell me what you can do for me, then show me one thing
✓ If Cursor says it is using box by Simular or shows a box by Simular tool in the answer, you are connected

Menu names checked against Cursor’s help page on Nov 11, 2026 · your screen may differ slightly by app version

Works with VS Code · about 2 min

No key, nothing to install

Click this button to open VS Code
Open in VS Code
VS Code asks you to confirm; click Install
Done
Open the AI chat in VS Code in Agent mode
Done
Try it
Use box by Simular and tell me what you can do for me, then show me one thing
✓ If VS Code says it is using box by Simular or shows a box by Simular tool in the answer, you are connected

Menu names checked against VS Code’s help page on Nov 11, 2026 · your screen may differ slightly by app version

Other apps that use MCP, such as Windsurf, Zed or Gemini CLI, each add servers differently. See how in the app list.

See every app that uses MCP →

Address for apps that connect over the web

Addresshttps://mcp.box.simular.ai/mcp

JSON settings are under “For developers” below

Stuck? Ask people who use box by Simular💬 Discussion →

For developers: Terminal commands and JSON settings

Over the web

Claude Code

claude mcp add --transport http --scope user box https://mcp.box.simular.ai/mcp

Cursor (~/.cursor/mcp.json)

{
  "mcpServers": {
    "box": {
      "url": "https://mcp.box.simular.ai/mcp"
    }
  }
}

VS Code (mcp.json)

{
  "servers": {
    "box": {
      "type": "http",
      "url": "https://mcp.box.simular.ai/mcp"
    }
  }
}

These settings are generated from the maker’s registry entry. If the README says otherwise, follow the README.

At a glance

GitHub stars i: 1
Downloads per weeki: Not on npm/PyPI
Verified domain: ✓ simular.ai
Licence i: MIT
Connection: Runs in the cloud
Transport: streamable-http
Latest versioni: 1.0.1
Categoryi: Developer tools
Published to registryi: Nov 4, 2026
Code last changedi: Nov 12, 2026
Maker: simular-ai
Repo: simular-ai/box-plugin
Website: box.simular.ai
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.

Connect over the internet in

Claude ChatGPT Goose LM Studio Msty Studio Cherry Studio Cursor VS Code + GitHub Copilot Visual Studio Windsurf (Devin Desktop)Zed Kiro Cline Continue JetBrains AI Assistant Claude Code Codex CLI Gemini CLI OpenCode nodecode Warp LibreChat Open WebUI Raycast

All apps, with pros and cons →

What it can do

The server asks you to sign in before it lists its tools.

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 against the domain simular.ai (the registry checks domain ownership)
✓ Pass
Still maintained
Code last changed yesterday
– Not applicable
Has a licence
Not applicable: a cloud server run by the owner of simular.ai; you don't run code from the repo
✓ Pass
Endpoint responds
Responded in 234 ms (HTTP 401)
✓ Pass
Sign-in with OAuth
Declares OAuth sign-in, so your AI app can take you to log in
… Not checked yet
No hidden instructions in tool descriptions
Not checked yet; we read the tool list when we check the endpoint

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 Developer toolsi

More stars than 69% of the other 5834 servers in this category
Published to the registry more recently than 71% of the other 5834 servers in this category
Basic checks equal to or better than 100% of the other 5834 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 box by Simular safe?

It passed 4 of 4 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 yesterday, and the latest version (1.0.1) reached the registry 9 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 on the web (full MCP on Business and above; Pro read-only).

What can I use instead?

In the same category: REA, GitHub, Serena MCP: the IDE for your agent

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

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GitHub

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Install

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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.

box by Simular: plugins

box gives your AI agent a computer of its own: a cloud Linux desktop with Chrome and a shell that it drives over MCP, while your own computer stays free. You can watch it live and take over at https://box.simular.ai/box.

Most agents need no plugin: add the MCP server https://mcp.box.simular.ai/mcp and sign in once (see https://box.simular.ai/install). This repository holds a package for each agent that installs box its own way. Each folder stands alone and is released through that agent's channel.

Agent	Folder	Sign-in	Install
Claude Code and Cowork	`claude/`	OAuth, once in the browser	`/plugin marketplace add simular-ai/box-plugin`, then `/plugin install box@simular-box`
DeepSeek Harness (dsh)	`dsh/`	Personal key (`cb_...`), pasted on the plugin's page in Plugins	dsh/README.md
Any of Claude Code, Codex, Cursor, OpenCode, Gemini CLI, Hermes, OpenClaw, VS Code (and steps for Claude Desktop)	`cli/`	OAuth; personal key with `--auth key` for Hermes and OpenClaw	`npx @simular-ai/box connect` (check with `npx @simular-ai/box doctor`)
Hermes Agent	`hermes/`	Personal key (`cb_...`) in `MCP_BOX_API_KEY`; OAuth optional	hermes/README.md

Offload: move a coding task into your box and back

Going offline in the middle of a task? In Claude Code with the plugin, /box:offload hands the task to a fresh Claude Code (or Codex, Cursor) session in your box, which keeps working while you are away; /box:back brings its commits and its written hand-over home and merges them. Any other agent or a plain terminal uses npx @simular-ai/box offload and npx @simular-ai/box back. Setup and details: cli/README.md.

Adding an agent

Add a folder named after the agent with its own manifest, MCP config and, where the agent supports skills, a copy of claude/skills/box/SKILL.md. Point it at https://mcp.box.simular.ai/mcp. Use OAuth sign-in where the agent supports it; otherwise read a personal key from an environment variable or the agent's own credentials store, never from a file in the package. Add a row above.

Releasing

claude/: bump version in claude/.claude-plugin/plugin.json. Claude Code doesn't auto-update third-party marketplaces: users get it with /plugin marketplace update simular-box and /plugin update box@simular-box, or with npx @simular-ai/box connect.
dsh/: bump version in dsh/package.json, then push a tag dsh-vX.Y.Z. The release workflow attaches dsh-box.tgz.
hermes/: bump version in hermes/plugin.json. Users copy the folder by hand until box is in the Hermes plugin catalog.
cli/: bump version in cli/package.json, then push a tag cli-vX.Y.Z. The publish-cli.yml workflow tests it and publishes @simular-ai/box to npm through trusted publishing (OIDC), with provenance; the one-time npm setup is in cli/README.md. When the box endpoint moves, change DEFAULT_MCP_URL in cli/src/constants.js, add the old host to OLD_HOSTS there, change the URL in every plugin folder, and release each one.

box by Simular

What it does

Install

Open Claude’s Connectors page

Click “Add” → “Custom” → “Web” and fill in these 2 fields

Turn it on in a chat

Try it

Open ChatGPT’s add-MCP page on the web

Fill in the name and address

Pick box by Simular in a chat

Try it

Open Terminal

Paste this command and press Enter

Type /mcp in Claude Code

Try it

Click this button to open Cursor

Open the AI chat in Cursor in Agent mode

Try it

Click this button to open VS Code

Open the AI chat in VS Code in Agent mode

Try it

Over the web

At a glance

Which apps can use it

Related guides

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

Discussion

User reviews

Compared with others in Developer toolsi

Common questions

Others in the same category

REA

GitHub

Serena MCP: the IDE for your agent

README from the maker

box by Simular: plugins

Offload: move a coding task into your box and back

Adding an agent

Releasing