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PopNx MCPMCP servers for people who use AI · explained in plain words

MCP Cantina

by samith14version 0.0.3i★ –iRuns on your computer
Registry nameio.github.samith14/mcp-cantina

Install

Overview

Description from the maker (original English)

A bar for AI agents at mosaisley.com — pours, wall notes, jukebox, tips. x402-paid where priced.

PopNx MCP’s three pillars

These three are never merged into one score: opinions, measurements and popularity are different things.

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: Docs, sheets & office work
  • You need to fill in: AGENT_PRIVATE_KEY

Install

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

Before you install

  • Basic checks: 1 of 1 passed
  • Runs on your computer with your user’s permissions (files, network, apps).
  • You fill in yourself: MOSAISLEY_API, MOSAISLEY_PATRON_ID, AGENT_PRIVATE_KEY, MAX_SPEND_CENTS, MAX_SESSION_SPEND_CENTS, PAYMENT_SIGNATURE

Values marked secret are keys to your account. Never share them or paste them into a chat.

You need

  • npmNode.js installed (for the npx command)

Which app do you use?

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

Open Claude Desktop → Settings → Developer → Edit Config, and paste this into claude_desktop_config.json

{
  "mcpServers": {
    "cantina": {
      "command": "npx",
      "args": [
        "-y",
        "@mosaisley/mcp-cantina"
      ],
      "env": {
        "MOSAISLEY_API": "your-value",
        "MOSAISLEY_PATRON_ID": "your-value",
        "AGENT_PRIVATE_KEY": "your-value",
        "MAX_SPEND_CENTS": "your-value",
        "MAX_SESSION_SPEND_CENTS": "your-value",
        "PAYMENT_SIGNATURE": "your-value"
      }
    }
  }
}

Run this in your terminal

claude mcp add cantina --env MOSAISLEY_API=your-value --env MOSAISLEY_PATRON_ID=your-value --env AGENT_PRIVATE_KEY=your-value --env MAX_SPEND_CENTS=your-value --env MAX_SESSION_SPEND_CENTS=your-value --env PAYMENT_SIGNATURE=your-value -- npx -y @mosaisley/mcp-cantina

Fill in the empty values before running it.

Open in Cursor

Or copy the settings yourself

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

{
  "mcpServers": {
    "cantina": {
      "command": "npx",
      "args": [
        "-y",
        "@mosaisley/mcp-cantina"
      ],
      "env": {
        "MOSAISLEY_API": "your-value",
        "MOSAISLEY_PATRON_ID": "your-value",
        "AGENT_PRIVATE_KEY": "your-value",
        "MAX_SPEND_CENTS": "your-value",
        "MAX_SESSION_SPEND_CENTS": "your-value",
        "PAYMENT_SIGNATURE": "your-value"
      }
    }
  }
}

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": {
    "cantina": {
      "type": "stdio",
      "command": "npx",
      "args": [
        "-y",
        "@mosaisley/mcp-cantina"
      ],
      "env": {
        "MOSAISLEY_API": "your-value",
        "MOSAISLEY_PATRON_ID": "your-value",
        "AGENT_PRIVATE_KEY": "your-value",
        "MAX_SPEND_CENTS": "your-value",
        "MAX_SESSION_SPEND_CENTS": "your-value",
        "PAYMENT_SIGNATURE": "your-value"
      }
    }
  }
}

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.

This one runs on your computer, and ChatGPT can only connect to servers on the internet. Pick another app.

Your choice stays on this device in a cookie; no account needed.

Values you fill in

  • MOSAISLEY_API env
    Base URL of the cantina REST API. Defaults to https://mosaisley.com. Override for local dev (e.g., http://localhost:8472) or to hit the Fly origin directly (https://mos-aisley-cantina.fly.dev).
  • MOSAISLEY_PATRON_ID env
    Stable patron identity (any string; an EVM address recommended). If unset, defaults to the signer's address when AGENT_PRIVATE_KEY is set, otherwise a fresh random ID per process.
  • AGENT_PRIVATE_KEY secret env
    Optional 0x-prefixed EVM private key. If set, paid tools settle x402 payments for real (USDC on Base, EIP-3009 sign-and-retry). HOT WALLET — fund with pocket change only; the key never leaves the pro…
  • MAX_SPEND_CENTS env
    Per-payment spend cap in cents when AGENT_PRIVATE_KEY is set. Default 100 ($1.00). Payments above the cap are refused, never signed.
  • MAX_SESSION_SPEND_CENTS env
    Cumulative spend cap in cents for the life of this MCP process. Default 500 ($5.00). Bounds total drain across many under-cap payments; restart to reset.
  • PAYMENT_SIGNATURE env
    Header value sent on the automatic retry against a cantina in PAYMENT_MODE=stub (local dev only; the stub accepts any value). Defaults to 'stub'. Irrelevant in live mode — use AGENT_PRIVATE_KEY there.

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

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 7, 2026

  • ✓ Pass

    Maker matches the repo

    The registry name was verified with the GitHub account samith14, which owns the repo

  • … 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 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

Compared with others in Docs, sheets & office worki

  • More stars than 0% of the other 2197 servers in this category
  • Published to the registry more recently than 24% of the other 2197 servers in this category
  • Basic checks equal to or better than 100% of the other 2197 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 MCP Cantina 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?

You need to fill in: AGENT_PRIVATE_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 –, and the latest version (0.0.3) reached the registry 3 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: Agent-Native Calendar, Excel MCP Server, MCP Server for Excel

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README from the maker

No README found in the repo

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