# io.github.GalenGoodwick/cartridge-cafe (npm · cartridge-cafe-mcp)

Your AI builds live WebGPU game worlds on cartridge.cafe — guest door, no account needed.

- Trust score: 68/100 (medium)
- Change this week: −9
- Registry status: active
- Liveness: live
- Owner verified: no
- Last scored: 2026-08-03

## Components

- npm · `cartridge-cafe-mcp`: 68/100 (this document), [markdown](https://verifymcp.io/servers/galengoodwick-cartridge-cafe/cartridge-cafe-mcp.md), [page](https://verifymcp.io/servers/galengoodwick-cartridge-cafe/cartridge-cafe-mcp)

## Channel facts

- Registry: `npm`
- Package: `cartridge-cafe-mcp`
- Version: `0.1.1`
- Transport: `stdio`

## Trust breakdown

How this component scores in each security and reliability category. Every signal is checked automatically from public evidence about the published package, including repeated runs of it in an isolated sandbox, and we only credit what we can confirm. Scores are 0–100 per category. Scoring method: https://verifymcp.io/docs/scoring (what has changed: https://verifymcp.io/docs/scoring/changelog)

Scored 2026-08-03.

- **Supply Chain Security**: 87/100
  - No malware found by supply-chain analysis.
  - Only part of the dependency tree could be resolved (95 of 99), so this covers what we could see, not the whole tree.
  - No install/post-install scripts declared.
  - Only part of the dependency tree could be resolved (95 of 99), so this covers what we could see, not the whole tree.
- **Provenance & Transparency**: 45/100
  - Source repository is publicly reachable at the declared URL.
  - Provenance check failed: no build-provenance attestation is published.
  - Clear OSI-approved license (MIT).
  - Actively maintained (last published 14 days ago).
  - Disclosure check failed: no security disclosure policy was found in the source repository.
- **Schema Quality & AI Usability**: 71/100
  - AI-judged instruction clarity (good).
  - Tool/resource definitions use about 408 tokens (~58/item across 7 items; 7 tools + 0 resources), lean.
  - Usage-examples check failed: none of the tools include examples.
- **Stability & Change Management**: 27/100
  - Stability observed for 8 of 30 days with no destabilising changes; credit accrues until the full window elapses.
- **Tool Coverage**: 93/100
  - 100% of tools have a non-trivial description (not blank, and not just the tool's name).
  - 80% of tool parameters carry a description.
- **Capabilities**: 100/100
  - Implements a supported MCP spec version (2025-11-25); the latest is 2026-07-28.

## Install

### Claude

```bash
claude mcp add galengoodwick-cartridge-cafe -- npx -y cartridge-cafe-mcp
```

### Codex

```bash
codex mcp add galengoodwick-cartridge-cafe -- npx -y cartridge-cafe-mcp
```

### opencode

```json
{
  "$schema": "https://opencode.ai/config.json",
  "mcp": {
    "galengoodwick-cartridge-cafe": {
      "type": "local",
      "command": [
        "npx",
        "-y",
        "cartridge-cafe-mcp"
      ],
      "enabled": true
    }
  }
}
```

### OpenClaw

```bash
openclaw mcp add galengoodwick-cartridge-cafe --command npx --arg -y --arg cartridge-cafe-mcp
```

### Hermes

```yaml
mcp_servers:
  galengoodwick-cartridge-cafe:
    command: "npx"
    args: ["-y", "cartridge-cafe-mcp"]
```

### Other

```json
{
  "mcpServers": {
    "galengoodwick-cartridge-cafe": {
      "command": "npx",
      "args": [
        "-y",
        "cartridge-cafe-mcp"
      ]
    }
  }
}
```

## Changelog

Every change recorded for this component, newest first. Days that predate change tracking, or that we cannot explain, say so: "we were watching and nothing happened" and "we were not watching" are different claims.

### 2026-08-03 (score 68, +4)

- [functional improvement] Stability: unverified → 0.27

### 2026-08-02 (score 64, +30)

- [security regression] Provenance: unverified → fail
- [security improvement] Known CVEs: unverified → partial
- [security improvement] Install scripts: unverified → pass
- [security improvement] Malware scan: unverified → pass
- [security] Stability: Stability not yet verified: we do not have a sandbox capture of the MCP schema this version of the package serves yet.
- [functional regression] Tool coverage: 100 → unverified
- [functional regression] Capabilities: pass → unverified
- [functional improvement] License: unverified → pass
- [functional improvement] Dependency health: unverified → partial
- [functional improvement] Maintenance: unverified → pass
- [functional] Licence: MIT

### 2026-08-01 (score 34, +29)

- [security] Stability: Stability not yet verified: not enough scan history yet (needs a 30-day window).
- [functional improvement] Tool coverage: unverified → 100
- [functional improvement] MCP protocol: unverified → pass

### 2026-07-31 (score 5, −4)

- [functional] We updated how we score, so this day's move reflects our rubric, not a change to the server

### 2026-07-30 (score 9, −68)

- [security regression] Install scripts: pass → unverified
- [security regression] Provenance: fail → unverified
- [security regression] Malware scan: pass → unverified
- [security regression] Known CVEs: partial → unverified
- [functional regression] Maintenance: pass → unverified
- [functional regression] Tool coverage: 100 → unverified
- [functional regression] License: pass → unverified
- [functional] First check of Schema quality: unverified
- [functional] Licence: MIT

### 2026-07-27 (score 77, +34)

- [functional] We updated how we score, so this day's move reflects our rubric, not a change to the server

### 2026-07-26 (score 43)

First indexed and scored.

## MCP tools (7)

### `read_guide` (~39 tokens)

The engine guide — MANDATORY reading before building. Contracts for visuals (WGSL), step hooks (JS), fields, and every bridge command.

### `browse_shelf` (~33 tokens)

Every world on the cafe's shelf, with play URLs. Public worlds' full source is readable via read_world_source.

### `read_world_source` (~59 tokens)

A public world's complete source — WGSL visuals, step-hook code, fields, params. The shelf is a library, not a vault: learn techniques from working worlds.

Input parameters:

- `name` (string, required): World name exactly as it appears on the shelf

### `brew_world` (~65 tokens)

Create YOUR OWN world through the guest door — no account needed. Returns a build token (uc_st_) for the bridge. Guests get three creations; editing is unlimited. Sign in on the site later and everything transfers to your account.

Input parameters:

- `name` (string, required): The world's name

### `bridge` (~104 tokens)

Send a command (or {"commands":[...]} batch) to a world over the bridge — create_field, define_visual, add_step_hook, set_world_data, and the rest per the guide. Uses your most recently brewed world unless a token is given (also accepts uc_sc_ branch tokens from connect prompts).

Input parameters:

- `command` (object, required): The bridge command object
- `token` (string): World token (uc_st_/uc_sc_). Defaults to your latest brewed world.

### `world_state` (~83 tokens)

Read a world's FULL current source over the bridge — every field, every visual's complete WGSL, every step-hook's complete JS code, plus worldData, params, modules, and interaction rules. This is how you read back exactly what you (or a previous session) built and iterate on it. Defaults to your latest brewed world.

Input parameters:

- `token` (string)

### `my_worlds` (~25 tokens)

The worlds you have brewed in this session, with their tokens and view URLs.

## Diagnostics

Captured diagnostic sections: Provenance, Dependencies. The full working is on the page: https://verifymcp.io/servers/galengoodwick-cartridge-cafe/cartridge-cafe-mcp#diagnostics

## Score history

- 2026-08-03: 68
- 2026-08-02: 64
- 2026-08-01: 34
- 2026-07-31: 5
- 2026-07-30: 9
- 2026-07-28: 77
- 2026-07-27: 77
- 2026-07-26: 43

## Links

- npm package: https://www.npmjs.com/package/cartridge-cafe-mcp
- Socket report: https://socket.dev/npm/package/cartridge-cafe-mcp
- Repository: https://github.com/GalenGoodwick/Cartridge-Cafe
- Changelog RSS feed: https://verifymcp.io/servers/galengoodwick-cartridge-cafe/cartridge-cafe-mcp/changelog.xml
- Changelog JSON feed: https://verifymcp.io/servers/galengoodwick-cartridge-cafe/cartridge-cafe-mcp/changelog.json
- HTML version of this page: https://verifymcp.io/servers/galengoodwick-cartridge-cafe/cartridge-cafe-mcp