ScratchRun MCP Server

by scratchrun Your server? Claim it

local only

ScratchRun runs on your own machine — the client starts it, so there is no endpoint to ping. 30 installs a week from npm. Last commit 4 Aug 2026.

Ephemeral MicroVM-isolated code execution for AI agents. Fresh VM per call, hard-purged after.

Installs per day peak 17 · avg 7 · +36% w/w

a month agotoday

Installs / week

npm · @scratchrun/mcp-server

Stars

0 open issues

4 Aug 2026

Last commit

0 releases in 90 days

MIT

License

JavaScript

Nothing serious here today

Today is the operative word: we check ScratchRun every 15 minutes and re-read its code on every release. Watch it and you find out the day that stops being true.

Connect this server

This server runs on your own machine — install it with the package manager and the client starts it for you. Package name taken from the official registry entry.

Claude Code Claude Desktop Codex Cursor VS Code

run in your terminal

claude mcp add mcp -- npx -y @scratchrun/mcp-server

~/Library/Application Support/Claude/claude_desktop_config.json

{
  "mcpServers": {
    "mcp": {
      "args": [
        "-y",
        "@scratchrun/mcp-server"
      ],
      "command": "npx"
    }
  }
}

~/.codex/config.toml

[mcp_servers.mcp]
command = "npx"
args = ["-y", "@scratchrun/mcp-server"]

.cursor/mcp.json

{
  "mcpServers": {
    "mcp": {
      "args": [
        "-y",
        "@scratchrun/mcp-server"
      ],
      "command": "npx"
    }
  }
}

.vscode/mcp.json

{
  "mcpServers": {
    "mcp": {
      "args": [
        "-y",
        "@scratchrun/mcp-server"
      ],
      "command": "npx"
    }
  }
}

This one needs environment variables set before it will start: SCRATCHRUN_API_KEY (ScratchRun API key — get one at https://scratchrun.dev). The author declared them in the registry entry; get the values from the project itself.

Alternatives to ScratchRun

same job, measured the same way

Cinch

by yusufkadry

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

26 installs/wk local only

Scanpay

by misterio070

Code security scanner for AI agents. 45+ vulnerability patterns, AST analysis, Solana micropayments.

29 installs/wk local only

AgentAegis

by astafford8488

Pay-per-call cybersecurity for AI agents: vuln scans, threat intel, compliance, code security.

28 tools answering

patchwork — Codebase Conventions for AI Agents

by sainarayana-b

Scan any codebase, generate CONVENTIONS.md, expose conventions as MCP tools for AI agents.

115 installs/wk local only

Codequiry

by codequiry

Source code plagiarism, peer similarity, and AI-generated-code detection for AI agents.

answering

X402engine MCP

by agentc22

50+ pay-per-call APIs for AI agents — images, LLM, code, crypto, travel & more via x402

33 installs/wk local only

Nanami Products

by haserisa0810-gif

Pre-computed astrology YAML via Swiss Ephemeris. Calculation is code, interpretation is AI.

5 tools answering

DevInbox

by devinbox

Real email inboxes for AI agents: create inboxes, catch verification codes, extract OTPs, reply.

answering

ScratchRun — questions

Answers built from our own checks of this server.

Why is there no uptime for ScratchRun?

ScratchRun runs on your own machine over stdio — there is no network address to reach, so uptime cannot be measured for it by anyone. What can be measured is adoption: the npm package @scratchrun/mcp-server was installed 30 times last week.

How do I connect ScratchRun?

Copy the ready config from this page — we generate it for Claude Code, Claude Desktop, Codex, Cursor and VS Code, each with the file path that client actually reads. It runs locally, so the command pulls @scratchrun/mcp-server straight from npm; nothing to host, nothing to sign up for.

How many people use ScratchRun?

The npm package @scratchrun/mcp-server was installed 30 times in the last week. Week over week that is +36%. We show installs rather than GitHub stars on purpose: a star is a bookmark, an install is someone actually running it.

Is ScratchRun open source?

Yes — it is published under the MIT licence, written in JavaScript and 0 stars on GitHub. The source link is on this page, so you can read exactly what it does with your data before you connect it.