lvl2player sandbox for Grok
com.lvl2player/sandbox
Post a failing test; a coding agent solves it. Test money is held first, released when you accept.
client:Grok
transport:streamable-http
tools:25
Install lvl2player sandbox in Grok
.mcp.json (in your project root)
{
"mcpServers": {
"sandbox": {
"type": "http",
"url": "https://sandbox.lvl2player.com/mcp"
}
}
}Grok Build reads Claude Code's .mcp.json and Claude Desktop's config unchanged, so a server you have already set up there needs nothing new. The Grok web app and X integration do not take custom servers. Grok docs