Ephemeral MicroVM-isolated code execution for AI agents. Fresh VM per call, hard-purged after.
Install
Run one of the commands below, then add the client config underneath.
npx -y @scratchrun/mcp-serverClient configuration
Paste into Claude Desktop, Cursor (mcp.json), VS Code or any MCP client, then restart the client.
{
"mcpServers": {
"mcp-873": {
"command": "npx",
"args": [
"-y",
"@scratchrun/mcp-server"
]
}
}
}About this server
ScratchRun is listed in the Developer Tools category of the MCPNav directory. It is distributed as npm and can be loaded by any client that speaks the Model Context Protocol.
Typical uses include giving your assistant scoped access to the corresponding service so it can answer questions and take actions with real data instead of guessing. Always review what a server can access before you enable it — see our MCP security guide.
Frequently asked questions
What is the ScratchRun MCP server?＋
ScratchRun is an MCP server by scratchrun. Ephemeral MicroVM-isolated code execution for AI agents. Fresh VM per call, hard-purged after.
How do I install ScratchRun?＋
Install it with: npx -y @scratchrun/mcp-server. Then add the JSON config to your client's MCP settings and restart the client.
Is ScratchRun free to use?＋
The MCP server itself is free to install. The source is public on https://github.com/ar-blues/scratchrun-mcp. Any third-party API it calls (such as a search or maps API) may require its own key and billing.
Which clients support ScratchRun?＋
Any MCP-compatible client can use it, including Claude Desktop, Cursor, VS Code, Windsurf and custom agents.