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mcp/harbor
Grok

D20DAO Verifiable Randomness for Grok

org.d20dao/vrf

Verifiable dice, draws and shuffles with on-chain VRF proofs on Arc. 0.05 USDC per draw.

client:Grok transport:stdio runtime:npm

Install D20DAO Verifiable Randomness in Grok

.mcp.json (in your project root)

Held in this page only — never stored, logged, or sent anywhere but back to your screen. 

{
  "mcpServers": {
    "vrf": {
      "type": "stdio",
      "command": "npx",
      "args": [
        "-y",
        "@d20dao/mcp"
      ],
      "env": {
        "D20_DAILY_LIMIT_USDC": "<D20_DAILY_LIMIT_USDC>",
        "D20_NETWORK": "<D20_NETWORK>",
        "D20_PAY_CHAIN": "<D20_PAY_CHAIN>",
        "D20_WALLET_ADDRESS": "<D20_WALLET_ADDRESS>",
        "D20_CIRCLE_CLI": "<D20_CIRCLE_CLI>",
        "D20_MCP_HOME": "<D20_MCP_HOME>"
      }
    }
  }
}

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

D20DAO Verifiable Randomness in other clients

D20DAO Verifiable Randomness MCP server