D20DAO Verifiable Randomness MCP Server

org.d20dao/vrf

Repository Registry

What is the D20DAO Verifiable Randomness MCP server?

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

How to install D20DAO Verifiable Randomness

Copy-paste configuration for popular MCP clients.

transport: stdio

Config generated by PluginBench — verify against the source before use.

Environment / auth

D20_DAILY_LIMIT_USDC
Spending cap per UTC day in USDC (default 1; 0 turns paid draws off).
D20_NETWORK
mainnet (default) or testnet.
D20_PAY_CHAIN
Circle CLI chain code to pay from, such as ARC or BASE (default: first funded).
D20_WALLET_ADDRESS
Agent wallet to pay from (default: the first one the Circle CLI lists).
D20_CIRCLE_CLI
Path to the Circle CLI's dist/index.js (default: circle on PATH).
D20_MCP_HOME
Folder for the daily spending record (default ~/.d20dao-mcp).

~/Library/Application Support/Claude/claude_desktop_config.json

{
  "mcpServers": {
    "vrf": {
      "command": "npx",
      "args": [
        "-y",
        "@d20dao/mcp"
      ],
      "env": {
        "D20_DAILY_LIMIT_USDC": "<YOUR_D20_DAILY_LIMIT_USDC>",
        "D20_NETWORK": "<YOUR_D20_NETWORK>",
        "D20_PAY_CHAIN": "<YOUR_D20_PAY_CHAIN>",
        "D20_WALLET_ADDRESS": "<YOUR_D20_WALLET_ADDRESS>",
        "D20_CIRCLE_CLI": "<YOUR_D20_CIRCLE_CLI>",
        "D20_MCP_HOME": "<YOUR_D20_MCP_HOME>"
      }
    }
  }
}

Related MCP servers

DeckSpace

Publish an HTML presentation — a slide deck or scrolling document — at a shareable link.

DeFade — Multi-Chain Memecoin Analyzer

Rug pull risk and on-chain forensics for tokens on Solana, Ethereum, Base and Robinhood.

Python Code Reviewer

Security + bug + perf + refactor audit for Python. Returns 0-10 score + MD report.

aiworker-data

Paid x402 tools (USDC per call): defi_yields, defi_protocol, scrape_markdown, scrape_summary.

AIGEN — Open Bounty Protocol for AI Agents

Active

Open bounty protocol for AI agents. 22 tools: token safety scans + paid missions. 0.5% fee.

Python

MIT

View repository →

Election Index

Neutral, sourced election calendar: polling days, when provisional and final results are due.