MCP.Market

Cartridge Cafe MCP server

by GalenGoodwick·io.github.GalenGoodwick/cartridge-cafe·v0.1.1
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Your AI builds live WebGPU game worlds on cartridge.cafe — guest door, no account needed.

A92/100grade A
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Safety scan
A92/100

full report

Adoption
Growing

0 stars67 downloads/wk

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If you have run it, two minutes of your experience saves the next person an afternoon.

Cartridge Cafe tools (7, 2 write)

write = sends, deletes, buys or posts

Read from the package source without running it. The installed server may list more.

  • brew_worldwrite action

    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.

  • bridgewrite action

    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).

  • browse_shelf

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

  • my_worlds

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

  • read_guide

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

  • read_world_source

    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.

  • world_state

    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.

Public scan report

scanner v0.1.9 · 2026-09-25 · same rubric, same numbers if you re-run it

no findings
  • Code scan2 source files scanned25/25
  • –Live reliabilityno gateway calls yet and no remote to proben/a
  • –Tool poisoningtools not inspected (local package is not executed); not countedn/a
  • Auth qualitylocal package, no credentials required12/15
  • Maintenancelast push 2 days ago15/15
  • Maintainer identityregistry namespace matches repository owner; GitHub account older than a year8/10
Overall 92/100. Components that don't apply are left out of the denominator. Any critical finding is an F.RubricAppeal a findingJSON

How Cartridge Cafe compares

Against every graded MCP server, from our own scans and uptime checks. Updated after each scan run.

Safety score
92/100
higher than 95% of 48,255 servers
Tools
7
the typical server has 7
Tools that change things
29%
typical: 0%. Fewer write tools means less an agent can break
Downloads a week
67
more than 52% of 12,191 servers with a package

What its tools let an agent do: 5 read · 2 change

Install Cartridge Cafe in Claude Code, Cursor or VS Code

Runs npx -y cartridge-cafe-mcp on your machine. Read the scan report first; the gateway never runs local packages.

claude mcp add cartridge-cafe -- npx -y cartridge-cafe-mcp
Add to Cursor

What the publisher says

From the Cartridge Cafe repository's README, as published. We do not edit it. Read it on GitHub

cartridge.cafe

Little worlds, served as single files. Brewed by people and their AIs.

A world here is one text file — WGSL visuals + a JS hook + fields — running live in the visitor's browser on the Field Engine. Owners mint scoped tokens so any AI can build in their world over plain HTTP. Save points are append-only; remixes carry lineage.

Run

cd web
npm install
cp .env.example .env.local   # fill in
npx prisma db push
npm run dev

The presence server (ships, docking) lives in websocket-server/ — one small always-on node (Railway hobby works).

Map

(also served at /api/engine/guide)

  • / — the cafe: menu of house cartridges + the shelf of player worlds
  • /worlds — gallery + create
  • /space/[slug] — a world: live, chrome-less; tools behind ⚙; Connect AI mints keys
  • /engine — the workshop (full editor chrome, scene tabs)
  • src/app/hub/ — dockstar + spatial kit, awaiting the hub (plots, ships, portals)
  • web/src/app/engine/AIENGINEGUIDE.md — the guide any connected AI should read

Coming

Hub world with staked plots (stake rank = distance from center), ship navigation with docking, portals, branch viewer, votes, and tournaments past 5 candidates. Stake source is pluggable: points first, $CART (Solana) when it launches.

Nothing above is checked by us. What we check is on the safety report.

Cartridge Cafe: common questions

Is Cartridge Cafe MCP server safe?
Yes, by our scan: it is graded A (92/100). Read the Cartridge Cafe safety report
How do I install Cartridge Cafe?
It runs on your machine. Copy the Claude Code, Cursor, VS Code or Claude Desktop config from the install section.
Does Cartridge Cafe need an API key?
Not as far as the registry entry and our scan can tell: no credentials are declared or required.
Is Cartridge Cafe maintained?
The last commit was 42 days ago (2026-09-23). The latest release is v0.1.1.
How does Cartridge Cafe compare with other MCP servers?
safety score 92/100 (higher than 95% of 48,255 servers); tools 7 (the typical server has 7); tools that change things 29% (typical: 0%. Fewer write tools means less an agent can break). Full comparison.