scratch-mcp

scratch-mcp is an MCP server for Claude Code, Codex, Cursor from AstroBlocksMod/ScratchMCP. Its token cost is not measured, scanned A, a copy of slac-mcp, MPL-2.0.

A local connection to Scratch, the block-based programming platform, for editing .sb3 project files.

In plain words
What is it for?
Use it to edit Scratch .sb3 projects from a local MCP server.
Why use it?
It gives a coding agent a way to work with Scratch projects through the Scratch4JS library.

MCP server for Claude CodeCodexCursor

Install

Getting it into your agent

One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.

agentmods
npx agentmods add mcp/astroblocksmod/scratchmcp/scratch-mcp
Clone the repo
git clone --depth 1 https://github.com/AstroBlocksMod/ScratchMCP

Made for: Claude Code, Codex, Cursor.

Wrote this? Show the measurements

A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.

agentmods badge for scratch-mcp

README.md
[![agentmods](https://agentmods.dev/badge/mcp/astroblocksmod/scratchmcp/scratch-mcp.svg)](https://agentmods.dev/mcp/astroblocksmod/scratchmcp/scratch-mcp)
Your own site
<a href="https://agentmods.dev/mcp/astroblocksmod/scratchmcp/scratch-mcp"><img src="https://agentmods.dev/badge/mcp/astroblocksmod/scratchmcp/scratch-mcp.svg" alt="Measured on agentmods" height="20"></a>
Per session not measured What this adds to a session before it is invoked.
When invoked not measured Not applicable: nothing here is loaded into a session.
Security scan A 0 findings. Scan, not verified.
Origin 86% copy Near-identical to another mod in the catalogue.
Security

Grade A, and why

scratch-mcp scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 3d ago.

A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.

Nothing flagged

None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.

Origin

This is a copy

86% identical to slac-mcp — 7 lines differ, which has more behind it and is treated as the original. This page carries a canonical link to it rather than competing with it.

listed in the official MCP registry · 9 lines

What it actually says

{ "scratch-mcp": { "command": "npx", "args": [ "-y", "scratch-mcp" ] } }

Changes

What this file has done since we first saw it

Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.

  1. 3d ago First seen · 9 lines scan A 690c34ad11a5

Subscribe to this mod's changes

scratch-mcp is an MCP server published in the GitHub repository AstroBlocksMod/ScratchMCP (0 stars, last pushed 9d ago), licensed MPL-2.0. Its token cost is not measured: an MCP server costs its tool schemas, not its config file. A static security scan graded it A with 0 findings. It is 86% identical to slac-mcp, differing in 7 lines, and is treated as a copy.