JS MCP Server
by r33drichardsio.github.r33drichards/mcp-jsv0.21.0-rc.5
JavaScript sandbox that uses V8 isolation to run AI-generated code locally, with heap snapshotting for persistent sessions.
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Active1d ago
Install JS MCP server
Install in Claude Code
claude mcp add js -- docker run -i --rm docker.io/wholelottahoopla/mcp-js:0.21.0-rc.5Install in Cursor
{
"mcpServers": {
"js": {
"command": "docker",
"args": [
"run",
"-i",
"--rm",
"docker.io/wholelottahoopla/mcp-js:0.21.0-rc.5"
]
}
}
}Add to ~/.cursor/mcp.json (global) or .cursor/mcp.json (project).
Install in Claude Desktop
{
"mcpServers": {
"js": {
"command": "docker",
"args": [
"run",
"-i",
"--rm",
"docker.io/wholelottahoopla/mcp-js:0.21.0-rc.5"
]
}
}
}Settings → Developer → Edit Config (claude_desktop_config.json), then restart.
Install in VS Code
{
"servers": {
"js": {
"type": "stdio",
"command": "docker",
"args": [
"run",
"-i",
"--rm",
"docker.io/wholelottahoopla/mcp-js:0.21.0-rc.5"
]
}
}
}Add to .vscode/mcp.json in your workspace.
Install in Windsurf
{
"mcpServers": {
"js": {
"command": "docker",
"args": [
"run",
"-i",
"--rm",
"docker.io/wholelottahoopla/mcp-js:0.21.0-rc.5"
]
}
}
}Add to ~/.codeium/windsurf/mcp_config.json.
Freshness
Active — last maintenance signal 1d ago. The newest of the signals below sets the band.
Last commit (default branch)
2026-10-08 · 1d ago · GitHub
Latest release
2026-10-08 · 1d ago · GitHub · v0.22.0
Package published
no data · npm/PyPI
Registry entry updated
2026-10-04 · 6d ago · official registry · v0.21.0-rc.5
FAQ
›How do I install the JS MCP server in Claude Code?
Run: claude mcp add js -- docker run -i --rm docker.io/wholelottahoopla/mcp-js:0.21.0-rc.5. For Cursor, VS Code, Claude Desktop and Windsurf, use the install tabs above.
›Does JS require an API key?
No required environment variables are declared in its published metadata.
›Can I use JS as a remote (hosted) MCP server?
No hosted endpoint is published; it runs locally over stdio.
›Is JS in the official MCP registry?
Yes, as io.github.r33drichards/mcp-js.
Alternatives to JS
Other code execution & sandboxes MCP servers.