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mcp/harbor
Grok

Flit Physics for Grok

io.github.brashler/flit

Tiny sphere-physics engine for three.js games: spawn, step, raycast, InstancedMesh-ready positions

client:Grok transport:stdio runtime:npm

Install Flit Physics in Grok

.mcp.json (in your project root) 

{
  "mcpServers": {
    "flit": {
      "type": "stdio",
      "command": "npx",
      "args": [
        "-y",
        "flit-physics"
      ]
    }
  }
}

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

Flit Physics in other clients

Flit Physics MCP server