ScratchRun

Overview

ScratchRun is a Model Context Protocol (MCP) server: Ephemeral MicroVM-isolated code execution for AI agents. Fresh VM per call, hard-purged after. As an MCP server it plugs straight into AI assistants, exposing its functionality as tools the model can invoke on your behalf.

It runs locally: the npm package @scratchrun/mcp-server speaks MCP over stdio on your machine. Configuration happens through environment variables — you'll need SCRATCHRUN_API_KEY. The current release is v0.1.1, with source at ar-blues/scratchrun-mcp on GitHub.

You'll find ScratchRun in the AI & Agents category here on mcp.site; it connects to Claude Desktop, Claude Code, Cursor, VS Code, Windsurf, Zed, and any other MCP client — see the install snippets below. If you maintain ScratchRun for scratchrun.dev, claim this listing to verify ownership, earn the Verified badge, and keep the details current.

Installation

// claude_desktop_config.json
{
  "mcpServers": {
    "scratchrun": {
      "command": "npx",
      "args": [
        "-y",
        "@scratchrun/mcp-server"
      ],
      "env": {
        "SCRATCHRUN_API_KEY": "<scratchrun-api-key>"
      }
    }
  }
}

Requires SCRATCHRUN_API_KEY