D20DAO Verifiable Randomness

Name: D20DAO Verifiable Randomness
Author: d20dao

作者：d20dao版本 0.1.2i★ –i在你的电脑上运行

注册名称org.d20dao/vrf

安装

概览

作者提供的说明（英文原文）

Verifiable VRF draws on Arc, 0.05 USDC each. On Robinhood Chain, integrate on chain with the SDK.

PopNx MCP 的三大支柱

这三项永远不会合并成一个分数：意见、测量和人气是不同的东西。

用户评价i暂无评价评价功能将在后续阶段与账户功能一起开放
我们的基础检查i1 项中通过 1 项依据公开信息检查；尚未扫描代码
使用情况i尚未统计★ –

它能帮你做什么

我们还没有为它写通俗的介绍。下面是我们从注册中心读取到的事实。

连接方式: 在你的电脑上运行
传输方式: stdio
分类: 其他

安装

选择你使用的 AI 应用，然后复制设置。

安装之前

基础检查：1 项中通过 1 项
在你的电脑上运行，拥有你的用户账户的权限（文件、网络、应用）。
需要你自己填写： D20_DAILY_LIMIT_USDC, D20_NETWORK, D20_PAY_CHAIN, D20_WALLET_ADDRESS, D20_CIRCLE_CLI, D20_MCP_HOME

你需要

npm已安装 Node.js（用于 npx 命令）

你用的是哪个应用？

ClaudeClaude CodeCursorVS CodeChatGPT

在上方选择你的应用。我们会记住它，下次按钮会显示“安装到 …”。

打开 Claude Desktop → Settings → Developer → Edit Config，把下面的内容粘贴到 claude_desktop_config.json

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

在终端中运行这条命令

claude mcp add vrf --env D20_DAILY_LIMIT_USDC=your-value --env D20_NETWORK=your-value --env D20_PAY_CHAIN=your-value --env D20_WALLET_ADDRESS=your-value --env D20_CIRCLE_CLI=your-value --env D20_MCP_HOME=your-value -- npx -y @d20dao/mcp

运行前请先填写空着的值。

在 Cursor 中打开

或者自己复制设置

粘贴到项目中的 .cursor/mcp.json，或 ~/.cursor/mcp.json

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

浏览器会先询问是否打开应用，然后应用会显示设置并请你确认。密钥的值会留空，由你自己填写。

在 VS Code 中打开

或者自己复制设置

粘贴到项目中的 .vscode/mcp.json

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

浏览器会先询问是否打开应用，然后应用会显示设置并请你确认。密钥的值会留空，由你自己填写。

这个服务器在你的电脑上运行，而 ChatGPT 只能连接互联网上的服务器。请选择其他应用。

你的选择通过 Cookie 保存在这台设备上，无需账户。

需要你填写的值

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

这些设置是根据作者在注册中心的条目生成的。如果 README 的写法不同，请以 README 为准。

它能做什么

它在你的电脑上运行；安装后，工具列表会显示在你的 AI 应用中。

基础检查i

我们检查的是任何人都能看到的信息；我们没有阅读代码。不适用的检查项不计入总数。 · 检查于 2026年11月7日

✓ 通过
作者与仓库一致
注册名称已通过域名 d20dao.org 验证（注册中心会核实域名所有权）
… 尚未检查
仍在维护
我们还没有从 GitHub 读取这个仓库
… 尚未检查
有许可证
我们还没有从 GitHub 读取这个仓库
– 不适用
端点有响应
它在你的电脑上运行，没有互联网端点
– 不适用
使用 OAuth 登录
在你的电脑上运行，改用本地设置
… 尚未检查
工具描述中没有隐藏指令
它在你的电脑上运行；我们只能读取互联网端点的工具列表

与“其他”中的其他服务器比较i

星标数多于此分类中其他 32545 个服务器的 0%
发布到注册中心的时间比此分类中其他 32545 个服务器的 58% 更新
基础检查结果等于或优于此分类中其他 32545 个服务器的 100%

与注册中心里这个分类中所有活跃的服务器比较。只有当发布者拥有该仓库时，星标数才计入。

常见问题

D20DAO Verifiable Randomness 安全吗？

它在 1 项适用的基础检查中通过了 1 项。我们没有阅读代码。在添加密钥或令牌之前，请先看看这个服务器要求哪些权限，并使用只具备所需权限的密钥。

它需要哪些密钥或代码？

注册中心没有列出必需的密钥，不过有些服务器会在首次使用时要求你登录。

它在我的电脑上运行还是在云端？

它在你的电脑上运行。你的 AI 应用会在需要时启动它，数据不会经过作者的服务器（除非它自己调用在线服务）。

它还在维护吗？

GitHub 仓库最后更新于–，最新版本（0.1.2）于28天前进入注册中心。

哪些应用可以使用它？

支持 MCP 的应用，例如 Claude Desktop、Claude Code、Cursor 和 VS Code。你的电脑上还需要有 Node.js。

有什么可以替代它？

同一分类中有：Spec Driven Development, Remote Desktop Commander, Python MCP

替代选择

同一分类中其他作者的服务器，按星标数排序。

如何看卡片：★ GitHub 星标i三大支柱：评价 · 检查 · 使用情况i更新 = 最新版本发布到注册中心的时间i

Spec Driven Development

作者：formulahendry

MCP Server that facilitates spec-driven development workflows, not just Vibe Coding.

在你的电脑上运行★ 440MIT14个月前更新

安装

Remote Desktop Commander

作者：desktop-commander

Remote Desktop Commander: use files, terminal and processes on your own computers from any AI app.

在云端运行★ 211昨天更新

安装

Python MCP

作者：Files-com

Local-only Python MCP server for the Files.com API.

在你的电脑上运行今天更新

安装

作者的 README

打开 README

按原文从作者的仓库复制。PopNx MCP 没有审查或背书其内容。HTML、图片和脚本已被移除。链接会离开本站。

D20DAO MCP server

Verifiable randomness for AI agents: dice, coin flips, ranges, winners and shuffles, each one a VRF request on Arc with a proof anyone can replay. 0.05 USDC per draw, paid from your Circle Agent Wallet.

Draws run on Arc through the D20DAO x402 API. D20DAO also runs on Robinhood Chain, where there is no x402 API: a contract there requests randomness directly on chain, using @d20dao/vrf-sdk 0.6.2 and its integration guide.

Setup

Wallet. Have your agent follow Circle's setup guide. It installs the Circle CLI, logs you in with an emailed code and creates an agent wallet. You accept Circle's terms yourself.
Funds. Fund the wallet with USDC and deposit some into Circle Gateway, for example on Arc:

   circle gateway deposit --chain ARC --method direct --amount 1 --address <wallet>

Arc, Polygon, Avalanche, Base, Arbitrum, Optimism, Unichain and Ethereum balances all work.

Server. Add it to your client.

Claude Code:

   claude mcp add d20dao -- npx -y @d20dao/mcp@0.1.2

Claude Desktop, Cursor and others (mcpServers in the client's MCP config):

   { "mcpServers": { "d20dao": { "command": "npx", "args": ["-y", "@d20dao/mcp@0.1.2"] } } }

On Windows, use "command": "cmd" with "args": ["/c", "npx", "-y", "@d20dao/mcp@0.1.2"] if the client cannot start npx directly. Pin the version, since the server runs with your Circle session.

Ask your agent to call setup_status; it names the next step until everything is ready.

Tools

Tool	Cost	Does
`draw`	0.05 USDC	`raw`, `coinFlip`, `dice` (up to 128), `range`, `chooseOne`, `chooseMany`, `shuffle` (up to 256 items). Returns the result with request, fulfillment and proof links.
`get_result`	free	Reads a draw by `paymentId` or a request by `requestId`.
`setup_status`	free	Checks the CLI, login, wallet, Gateway balance and today's spending.

An optional seed (up to 64 bytes) is bound on chain to the draw, so a raffle can name its round before the result exists. Give each separate draw its own seed: an identical draw within five minutes returns the earlier one without paying.

A draw usually answers in about ten seconds, but it can take longer. If your client's tool timeout is short (60 seconds is a common default), raise it; a retry after a timeout returns the same draw rather than paying twice.

Settings

Variable	Default
`D20_DAILY_LIMIT_USDC`	`1`	Spending cap per UTC day, shared by every server process of the user. `0` turns paid draws off.
`D20_NETWORK`	`mainnet`	`testnet` uses the Arc Testnet API and a testnet CLI login (`circle wallet login --testnet`).
`D20_PAY_CHAIN`	first funded	Circle CLI chain code to pay from, such as `ARC` or `BASE`.
`D20_WALLET_ADDRESS`	first agent wallet	Agent wallet to pay from.
`D20_CIRCLE_CLI`	`circle` on PATH	Path to the CLI's `dist/index.js`.
`D20_MCP_HOME`	`~/.d20dao-mcp`	Where the spending record is kept.

Safety

The server holds no keys. The Circle CLI signs, and your Circle wallet limits apply. It never accepts Circle's terms for you: CIRCLE_ACCEPT_TERMS is kept out of the CLI it runs, and DO_NOT_TRACK is set so your item labels stay out of the CLI's telemetry.
It pays only api.d20dao.org (or api-testnet.d20dao.org) and never more than 0.05 USDC per draw. If the CLI ever reports another seller, that draw comes back with a warning and paid draws stop until you delete halt.json from the server's home folder.
Each draw reserves its price in the daily record before paying; if the record cannot be written, it does not pay.
A draw that is still pending is finished for free with get_result. If the answer is lost after payment, the server resends the payment the CLI signed, which the API honours at most once.
A result says charged: false only when that is known. When it says unknown, do not draw again; check with get_result or the wallet.
draw is marked as a tool with side effects, so clients ask before running it unless you allow it.

Verify

Every result links its request and fulfillment transactions and a proof page. Replay the proof yourself with @d20dao/vrf-sdk 0.6.2 or later; see verification and the agent API guide.

License

MIT