Cinch

Name: Cinch
Author: yusufkadry

by yusufkadryversion 0.1.1i★ 0iRuns on your computer

Registry nameio.github.yusufkadry/cinch

How to install

Overview

Description from the maker (original English)

Run AI-generated code safely. gVisor-isolated Python/JS sandboxes for any MCP client. Pay per run.

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 on your computer
Transport: stdio
Category: Developer tools
You need to fill in: CINCH_API_KEY

Install

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

Passed 2/2 checks · Runs on your computer

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, with some setup first

You need a Cinch key (sign up on the maker’s site, may cost money) · Install Node.js on your computer first (one time) · Only the Claude desktop app (Windows or Mac), not the web or phone

Install Node.js
One time only; it works for every server that needs Node.js
Open the Node.js download page ↗
Done
Sign up and create a Cinch key
Open the maker’s site, sign up and create an API key for the next step. It may cost money.
How to get a key is in the maker’s README below
Done
Open the Claude desktop app’s settings file
SettingsDeveloperEdit Config
Done

Paste these settings and save the file

{
  "mcpServers": {
    "cinch": {
      "command": "npx",
      "args": [
        "-y",
        "@cinch-codes/mcp"
      ],
      "env": {
        "CINCH_API_KEY": "your-value"
      }
    }
  }
}

Paste the key only into the app’s field, never into a chat or to anyone

Done

Quit Claude and open it again
Done
Try it
Use Cinch and tell me what you can do for me, then show me one thing
✓ If Claude says it is using Cinch or shows a Cinch 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

ChatGPT cannot connect Cinch yet

Cinch runs on your computer, but ChatGPT can only connect servers that run on the web

What you can do instead

A · Use an app that can connect Cinch

Steps for Claude →You need a Cinch key (sign up on the maker’s site, may cost money) · Install Node.js on your computer first (one time) · Only the Claude desktop app (Windows or Mac), not the web or phone
Steps for Claude Code →You need a Cinch key (sign up on the maker’s site, may cost money) · Install Node.js on your computer first (one time)
Steps for Cursor →You need a Cinch key (sign up on the maker’s site, may cost money) · Install Node.js on your computer first (one time)
Steps for VS Code →You need a Cinch key (sign up on the maker’s site, may cost money) · Install Node.js on your computer first (one time)

B · Others in Developer tools that work with ChatGPT

Picked from the most used in the same category, only ones that connect by address with no key

Sentry✓ ChatGPT
Front-End Checklist✓ ChatGPT
Compiler Explorer✓ ChatGPT

Works with Claude Code, with some setup first

You need a Cinch key (sign up on the maker’s site, may cost money) · Install Node.js on your computer first (one time)

Install Node.js
One time only; it works for every server that needs Node.js
Open the Node.js download page ↗
Done
Sign up and create a Cinch key
Open the maker’s site, sign up and create an API key for the next step. It may cost money.
How to get a key is in the maker’s README below
Done
Open Terminal
Mac: press Command+Space and type Terminal · Windows: open PowerShell
Done
4
Paste this command and press Enter
```
claude mcp add cinch --env CINCH_API_KEY=your-value -- npx -y @cinch-codes/mcp
```
Replace “your-value” with your key before pressing Enter
Paste the key only into the app’s field, never into a chat or to anyone
Done
Type /mcp in Claude Code
You should see Cinch listed as connected
Done
Try it
Use Cinch and tell me what you can do for me, then show me one thing
✓ If Claude Code says it is using Cinch or shows a Cinch 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, with some setup first

You need a Cinch key (sign up on the maker’s site, may cost money) · Install Node.js on your computer first (one time)

Install Node.js
One time only; it works for every server that needs Node.js
Open the Node.js download page ↗
Done
Sign up and create a Cinch key
Open the maker’s site, sign up and create an API key for the next step. It may cost money.
How to get a key is in the maker’s README below
Done
Click this button to open Cursor
Open in Cursor
Cursor asks you to confirm; click Install
Done
Fill in your key
In the Cinch settings, CINCH_API_KEY is empty; add your key and save
Paste the key only into the app’s field, never into a chat or to anyone
Done
Open the AI chat in Cursor in Agent mode
Done
Try it
Use Cinch and tell me what you can do for me, then show me one thing
✓ If Cursor says it is using Cinch or shows a Cinch 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, with some setup first

You need a Cinch key (sign up on the maker’s site, may cost money) · Install Node.js on your computer first (one time)

Install Node.js
One time only; it works for every server that needs Node.js
Open the Node.js download page ↗
Done
Sign up and create a Cinch key
Open the maker’s site, sign up and create an API key for the next step. It may cost money.
How to get a key is in the maker’s README below
Done
Click this button to open VS Code
Open in VS Code
VS Code asks you to confirm; click Install
Done
Fill in your key
In the Cinch settings, CINCH_API_KEY is empty; add your key and save
Paste the key only into the app’s field, never into a chat or to anyone
Done
Open the AI chat in VS Code in Agent mode
Done
Try it
Use Cinch and tell me what you can do for me, then show me one thing
✓ If VS Code says it is using Cinch or shows a Cinch 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 →

JSON settings are under “For developers” below

Stuck? Ask people who use Cinch💬 Discussion →

For developers: Terminal commands and JSON settings

Installed on your computer

Claude Code

claude mcp add cinch --env CINCH_API_KEY=your-value -- npx -y @cinch-codes/mcp

Claude Desktop (claude_desktop_config.json)

{
  "mcpServers": {
    "cinch": {
      "command": "npx",
      "args": [
        "-y",
        "@cinch-codes/mcp"
      ],
      "env": {
        "CINCH_API_KEY": "your-value"
      }
    }
  }
}

Cursor (~/.cursor/mcp.json)

{
  "mcpServers": {
    "cinch": {
      "command": "npx",
      "args": [
        "-y",
        "@cinch-codes/mcp"
      ],
      "env": {
        "CINCH_API_KEY": "your-value"
      }
    }
  }
}

VS Code (mcp.json)

{
  "servers": {
    "cinch": {
      "type": "stdio",
      "command": "npx",
      "args": [
        "-y",
        "@cinch-codes/mcp"
      ],
      "env": {
        "CINCH_API_KEY": "your-value"
      }
    }
  }
}

Values you fill in

CINCH_API_KEY secret required env
Cinch API key from cinch.codes

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

At a glance

GitHub stars i: 0
Downloads per weeki: 36/wk
Licence i: No licence stated
Connection: Runs on your computer
Transport: stdio
Latest versioni: 0.1.1
Categoryi: Developer tools
Published to registryi: Jul 24, 2026
Code last changedi: Jul 24, 2026
Maker: yusufkadry
Packages: npm: @cinch-codes/mcp
Repo: yusufkadry/cinch-mcp
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.

Run on your computer in

Claude 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 Raycast

All apps, with pros and cons →

What it can do

Runs on your computer; the tool list appears in your AI app after you install it.

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 11, 2026

✓ Pass
Maker matches the repo
The registry name was verified with the GitHub account yusufkadry, which owns the repo
✓ Pass
Still maintained
Code last changed 4 months ago
… Not checked yet
Has a licence
We have not read this repo from GitHub yet
– Not applicable
Endpoint responds
This one runs on your computer; there is no internet endpoint
– Not applicable
Sign-in with OAuth
Runs on your computer and uses local settings instead
… Not checked yet
No hidden instructions in tool descriptions
Runs on your computer; we can only read tool lists from internet endpoints

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 0% of the other 5752 servers in this category
Published to the registry more recently than 24% of the other 5752 servers in this category
Basic checks equal to or better than 100% of the other 5752 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 Cinch safe?

It passed 2 of 2 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?

You need to fill in: CINCH_API_KEY

Does it run on my computer or in the cloud?

It runs on your computer. Your AI app starts it when needed, and data does not pass through the maker’s servers (unless it calls an online service itself).

Is it still maintained?

The GitHub repo last changed 4 months ago, and the latest version (0.1.1) reached the registry 4 months ago.

Which apps can use it?

Apps that support MCP, such as Claude Desktop, Claude Code, Cursor and VS Code. You also need Node.js on your computer.

What can I use instead?

In the same category: REA, Netdata, Front-End Checklist

Alternatives

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

REA

Reverse engineer anything from your terminal or agent with one CLI and MCP server.

by morlutoWidely used↓ 388.7K/wk★ 448.2KUpdated 17 days ago

Runs on your computer

Install

Netdata

Real-time infrastructure monitoring with metrics, logs, alerts, and ML-based anomaly detection.

by netdataWidely used★ 81.3KUpdated 6 days ago

Runs in the cloud

Install

Front-End Checklist

Review frontend code and live pages against 386 quality-gated web development rules.

by thedaviddiasWidely used★ 74.7KUpdated 37 days ago

Runs in the cloud

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.

@cinch-codes/mcp

MCP server for Cinch. Gives your AI assistant a real sandbox to run code in.

Without it, an assistant writes code and you run it yourself. With it, the assistant runs the code and reads the actual output — inside a gVisor-isolated container on Cinch's infrastructure, with no access to your machine, filesystem, or local network.

Pay per execution. No subscription floor.

Setup

Get an API key at cinch.codes, then add the server to your MCP client.

Claude Desktop — claude_desktop_config.json:

"mcpServers": { "cinch": { "command": "npx", "args": ["-y", "@cinch-codes/mcp"], "env": { "CINCH_API_KEY": "cinch_live_..." } } } }

Claude Desktop on Windows — same file, but Windows can't spawn npx directly, so wrap it with cmd /c:

"mcpServers": { "cinch": { "command": "cmd", "args": ["/c", "npx", "-y", "@cinch-codes/mcp"], "env": { "CINCH_API_KEY": "cinch_live_..." } } } }

Claude Code (macOS/Linux):

claude mcp add --scope user cinch -e CINCH_API_KEY=cinch_live_... -- npx -y @cinch-codes/mcp

Claude Code (Windows):

claude mcp add --scope user cinch -e CINCH_API_KEY=cinch_live_... -- cmd /c npx -y @cinch-codes/mcp

Cursor — .cursor/mcp.json, same shape as the Claude Desktop config above.

Restart the client. That's it — no install step, npx fetches it on first run.

What it exposes

`execute_code`

Runs a self-contained Python or JavaScript program and returns stdout, stderr, exit code, and duration.

Parameter	Type	Default	Description
`code`	string	—	The complete program to run. Must print to stdout to return anything.
`language`	`python` \	`javascript`	`python`	Runtime to execute in.

Each call gets a clean sandbox. State does not persist between calls, so every snippet needs to stand on its own.

The sandbox environment

Deliberately minimal. Worth knowing before you wonder why an import failed:


Runtimes	Python 3.12, Node 20
Packages	Standard library only. No pip or npm packages are installed, and none can be installed at runtime.
Network	None. HTTP, DNS, and package installs all fail.
Filesystem	Root is read-only. `/tmp` is writable (64 MB) and destroyed when the run ends.
Memory	256 MB
CPU	0.5 cores
Time limit	10 seconds
Isolation	gVisor (`runsc`), all capabilities dropped, no-new-privileges, non-root user, 64-process cap

The tool description tells the model all of this up front, so it writes stdlib-only code instead of reaching for numpy and failing on the first call.

Configuration

Variable	Required	Default	Description
`CINCH_API_KEY`	yes	—	Your Cinch API key.
`CINCH_TIMEOUT_MS`	no	`20000`	Client-side timeout in ms. The API caps execution at 10s regardless.
`CINCH_BASE_URL`	no	`https://api.cinch.codes`	Override the API endpoint.

Troubleshooting

Windows: "Failed to connect" in `claude mcp list` — you're missing the cmd /c wrapper. Windows resolves npx to a batch script that can't be spawned directly; re-add the server using the Windows command above.

Windows: `npm error ENOENT ... AppData\Roaming\npm` — some Node installs never create npm's global folder, and npx refuses to run without it. Create it once and retry:

mkdir %APPDATA%\npm

Server exits immediately with "CINCH_API_KEY is not set" — the env var didn't reach the server. In Claude Code, put -e CINCH_API_KEY=... *before* the server name in claude mcp add. In config files, check the env block is inside the cinch entry.

Debugging any connection failure — run the server directly to see the real error instead of a generic status:

CINCH_API_KEY=cinch_live_... npx -y @cinch-codes/mcp   # macOS/Linux

set CINCH_API_KEY=cinch_live_... && cmd /c npx -y @cinch-codes/mcp   # Windows

Correct behavior is cinch-mcp ... ready followed by silence — an MCP server waits for a client. Anything else printed is the actual failure.

Why sandboxed execution

Code written by a model is untrusted code — nothing reviewed it before it ran. Executing it directly on your machine means handing it your filesystem, your network, and your credentials. Cinch runs it somewhere else entirely, in a disposable container with kernel-level isolation, and sends back only the output.

Notes

Requires Node 18 or newer.
Output is capped at 20,000 characters per stream to protect your context window; anything beyond that is truncated with a marker.
Runs that time out or exit non-zero are returned as tool errors, so the assistant knows the code failed and can correct it.
Out-of-credit responses are surfaced clearly and instruct the assistant not to retry, so a drained balance does not turn into a retry loop.

Links

MIT

Cinch

Overview

What you can do with it

Install

Install Node.js

Sign up and create a Cinch key

Open the Claude desktop app’s settings file

Paste these settings and save the file

Quit Claude and open it again

Try it

What you can do instead

Install Node.js

Sign up and create a Cinch key

Open Terminal

Paste this command and press Enter

Type /mcp in Claude Code

Try it

Install Node.js

Sign up and create a Cinch key

Click this button to open Cursor

Fill in your key

Open the AI chat in Cursor in Agent mode

Try it

Install Node.js

Sign up and create a Cinch key

Click this button to open VS Code

Fill in your key

Open the AI chat in VS Code in Agent mode

Try it

Installed on your computer

Values you fill in

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

Alternatives

REA

Netdata

Front-End Checklist

README from the maker

@cinch-codes/mcp

Setup

What it exposes

execute_code

The sandbox environment

Configuration

Troubleshooting

Why sandboxed execution

Notes

Links

`execute_code`