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ScratchRun

dev.scratchrun/mcp · v0.1.1

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

Connect Runs on your machine

Terminal
claude mcp add mcp -e SCRATCHRUN_API_KEY=<SCRATCHRUN_API_KEY> -- npx -y @scratchrun/[email protected]
claude_desktop_config.json
{
  "mcpServers": {
    "mcp": {
      "command": "npx",
      "args": [
        "-y",
        "@scratchrun/[email protected]"
      ],
      "env": {
        "SCRATCHRUN_API_KEY": "<SCRATCHRUN_API_KEY>"
      }
    }
  }
}
~/.cursor/mcp.json
{
  "mcpServers": {
    "mcp": {
      "command": "npx",
      "args": [
        "-y",
        "@scratchrun/[email protected]"
      ],
      "env": {
        "SCRATCHRUN_API_KEY": "<SCRATCHRUN_API_KEY>"
      }
    }
  }
}
.vscode/mcp.json
{
  "servers": {
    "mcp": {
      "type": "stdio",
      "command": "npx",
      "args": [
        "-y",
        "@scratchrun/[email protected]"
      ],
      "env": {
        "SCRATCHRUN_API_KEY": "<SCRATCHRUN_API_KEY>"
      }
    }
  }
}

Replace the values in angle brackets with your own. Keys stay on your machine; we never see them.

Tools

This server runs locally, so its tools are listed by your MCP client once it starts.

Environment variables

NameDescription
SCRATCHRUN_API_KEY
Required, secret
ScratchRun API key — get one at https://scratchrun.dev

Details

Package@scratchrun/[email protected] (NPM, stdio)
First published4 Aug 2026
Last updated4 Aug 2026
Registry namedev.scratchrun/mcp

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