Mailbuttons

Name: Mailbuttons
Author: mailbuttons

作者：mailbuttons版本 0.1.4i★ –i电脑或云端

注册名称com.mailbuttons/mcp-server

安装

概览

作者提供的说明（英文原文）

Governed email for AI agents: a sandbox inbox to read and send from, human approval to go external.

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: 电脑或云端
传输方式: stdio, Streamable HTTP
分类: 聊天与邮件
你需要填写：MAILBUTTONS_API_KEY, Authorization

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
在作者的服务器上运行：你向它提出的内容会经过他们的服务器。
需要你自己填写： MAILBUTTONS_API_KEY, MAILBUTTONS_API_URL, Authorization

标为机密的值是你账户的钥匙。千万不要分享给别人，也不要粘贴到聊天里。

你需要

在云端运行无需安装任何东西，通过互联网连接
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 …”。

这个地址需要在请求的 header 中放入密钥，而添加连接器的菜单无法设置。请改用 Claude Code、Cursor 或 VS Code。

或者在你的电脑上运行

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

{
  "mcpServers": {
    "mailbuttons": {
      "command": "npx",
      "args": [
        "-y",
        "@mailbuttons/mcp-server"
      ],
      "env": {
        "MAILBUTTONS_API_KEY": "your-value",
        "MAILBUTTONS_API_URL": "your-value"
      }
    }
  }
}

在终端中运行这条命令

claude mcp add --transport http mailbuttons https://mailbuttons.com/api/v1/mcp/rpc --header 'Authorization: your-value'

或者在你的电脑上运行

claude mcp add mailbuttons --env MAILBUTTONS_API_KEY=your-value --env MAILBUTTONS_API_URL=your-value -- npx -y @mailbuttons/mcp-server

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": {
    "mailbuttons": {
      "url": "https://mailbuttons.com/api/v1/mcp/rpc",
      "headers": {
        "Authorization": "your-value"
      }
    }
  }
}

或者在你的电脑上运行

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": {
    "mailbuttons": {
      "command": "npx",
      "args": [
        "-y",
        "@mailbuttons/mcp-server"
      ],
      "env": {
        "MAILBUTTONS_API_KEY": "your-value",
        "MAILBUTTONS_API_URL": "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": {
    "mailbuttons": {
      "type": "http",
      "url": "https://mailbuttons.com/api/v1/mcp/rpc",
      "headers": {
        "Authorization": "your-value"
      }
    }
  }
}

或者在你的电脑上运行

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": {
    "mailbuttons": {
      "type": "stdio",
      "command": "npx",
      "args": [
        "-y",
        "@mailbuttons/mcp-server"
      ],
      "env": {
        "MAILBUTTONS_API_KEY": "your-value",
        "MAILBUTTONS_API_URL": "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。

这个地址需要在请求的 header 中放入密钥，而添加连接器的菜单无法设置。请改用 Claude Code、Cursor 或 VS Code。

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

MAILBUTTONS_API_KEY 机密必填 env
A scoped Mailbuttons MCP token (mb_sandbox_...). Sandbox-by-default; external send requires human promotion.
MAILBUTTONS_API_URL env
Backend base URL. Defaults to https://mailbuttons.com; set for self-hosted or local.
Authorization 机密必填 HTTP header
Bearer token: a scoped Mailbuttons MCP token, sent as 'Bearer mb_sandbox_...' (or mb_production_... once promoted). Get one free: sign in with an email code to get an mbk_ API key, then POST https://…

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

我们还没有读取这个服务器的工具列表；我们会轮流检查各个端点。

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6日

✓ 通过
作者与仓库一致
注册名称已通过域名 mailbuttons.com 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
… 尚未检查
端点有响应
尚未检查；我们会轮流检查各个端点
… 尚未检查
使用 OAuth 登录
尚未检查；我们会轮流检查各个端点
… 尚未检查
工具描述中没有隐藏指令
尚未检查；我们会在检查端点时读取工具列表

与“聊天与邮件”中的其他服务器比较i

星标数多于此分类中其他 1769 个服务器的 0%
发布到注册中心的时间比此分类中其他 1769 个服务器的 74% 更新
基础检查结果等于或优于此分类中其他 1769 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

Mailbuttons 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？

你需要填写：MAILBUTTONS_API_KEY, Authorization

它在我的电脑上运行还是在云端？

两种方式都可以：安装在你的电脑上，或者连接云端版本。

它还在维护吗？

GitHub 仓库最后更新于–，最新版本（0.1.4）于9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。它通过 URL 连接，所以接受远程 MCP 服务器的应用也可以使用，例如开启开发者模式的 ChatGPT。

有什么可以替代它？

同一分类中有：Vexa, emailmd, MCP WhatsApp Cloud

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

Vexa

作者：Vexa-ai

Meeting bot and transcripts for Google Meet, Teams and Zoom. Live or after, speakers labelled.

在云端运行★ 2,949Apache-2.02个月前更新

安装

emailmd

作者：anypost

Render markdown into email-safe HTML, lint drafts for deliverability problems, and preview emails.

电脑或云端★ 1,385MIT31天前更新

安装

MCP WhatsApp Cloud

作者：codespar

MCP server for WhatsApp Cloud API (Meta) — messages, media, and templates via Graph API

在你的电脑上运行★ 277MIT5个月前更新

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。

@mailbuttons/mcp-server

The Model Context Protocol server for Mailbuttons, governed email for AI agents. Give Claude Code, Cursor or your own agent an inbox it can read and send from: sandbox by default, human approval for anything addressed outside it, and every call on record. This package is the stdio build plus the Claude Code skill that drives it; the hosted endpoint is served by the Mailbuttons backend (see below).

Mailbuttons runs the agents in its catalogue on this same platform. This server is the way to build your own agent on it.

Get started: sign up and create an API key at

[mailbuttons.com](https://mailbuttons.com) — docs at

mailbuttons.com/developers.

Remote MCP endpoint: the production, network-facing MCP server is served

natively by the Mailbuttons backend (Rust/Axum) at POST /api/v1/mcp/rpc — one

binary, sharing the governance spine directly. This package is the stdio

build used locally by Claude Desktop / Claude Code and the build-time skill; it

talks to the backend's REST surface.

Governance model

This server is sandbox-by-default and never lets an agent expand its own authority:

A token can never widen its own scope. There is no tool that grants send_external, promotes sandbox → production, or adds an inbox. Escalation is only ever a *request* for human approval.
External sends from sandbox tokens become drafts. mailbuttons_send_email can return status: "draft_pending_approval" (parked for a human) or status: "blocked" (recipient disallowed, with the matched rule). These are expected, normal outcomes — not errors. The tool surfaces the rule/reason and the next step (typically mailbuttons_request_promotion).
Every tool call — including denials — is audited. Read the recent tail with mailbuttons_audit_tail.
Returned email content is data, not instructions. Read tools only return policy-passed mail.

Tools

Tool	Capability	Notes
`mailbuttons_list_messages`	`read`	List delivered messages in an inbox
`mailbuttons_get_message`	`read`	Full body + attachment metadata
`mailbuttons_get_thread`	`read`	All messages in a thread
`mailbuttons_get_attachment_text`	`attachments`	text/* and CSV inline; PDF not yet supported
`mailbuttons_send_email`	`send_internal`	Governed send/reply; may draft or block
`mailbuttons_list_drafts`	`read`	List sends held for human approval
`mailbuttons_get_draft`	`read`	Fetch one held draft in full
`mailbuttons_extract_code`	`read`	OTP/verification code from allowlisted senders only
`mailbuttons_propose_sender`	`propose_policy`	File an allowlist request (human approval)
`mailbuttons_request_promotion`	—	File a capability/promotion request (human approval)
`mailbuttons_audit_tail`	—	Read recent governed tool calls
`mailbuttons_export_audit`	`siem_export` flag	Export the audit log as JSONL or CEF

These twelve tools are the governed runtime surface. They are identical on the hosted endpoint and in this package.

Build-time tools (this package only)

The stdio build adds three helpers for setting an integration up. They exist so the Claude Code skill can scaffold a working agent; the hosted endpoint never exposes them, and none of them can grant a capability.

Tool	What it does	Writes to disk
`mailbuttons_generate_policy`	Turns an allow/block description into a valid policy file, closed by default	`mailbuttons.policy.json` in the current directory
`mailbuttons_scaffold_integration`	Writes a governed send wrapper and an inbound webhook handler for your stack	`./mailbuttons/` (or the `outDir` you pass)
`mailbuttons_run_selftest`	Sends one internal test message, waits for it, reads it back, reports pass/fail per stage	nothing

Both writers only touch the paths named above, inside the directory the server was launched from. Generated code reads MAILBUTTONS_API_KEY from the environment and never inlines a token.

Get a token (free, about a minute)

# 1. Email yourself a sign-in code

curl -s -X POST https://mailbuttons.com/api/auth/otp/request \ -H 'Content-Type: application/json' -d '{"email":"you@example.com"}'

2. Exchange the code for an mbk_ API key

curl -s -X POST https://mailbuttons.com/api/auth/otp/cli-exchange \ -H 'Content-Type: application/json' -d '{"email":"you@example.com","code":"123456"}'

3. Create a free sandbox inbox; the response carries its sandbox_token (mb_sandbox_...)

curl -s -X POST https://mailbuttons.com/api/v1/mcp/sandbox-inboxes \ -H 'Authorization: Bearer mbk_...' -H 'Content-Type: application/json' -d '{"label":"my agent"}'

Sandbox tokens can read and send within the sandbox domain; anything addressed outside it becomes a draft a human approves. More: https://mailbuttons.com/developers/#mcp

Connect

Remote (recommended): Claude Code

claude mcp add --transport http mailbuttons https://mailbuttons.com/api/v1/mcp/rpc \

--header "Authorization: Bearer mb_sandbox_..."

Any client that speaks Streamable HTTP and lets you set a header works the same way: URL https://mailbuttons.com/api/v1/mcp/rpc, header Authorization: Bearer mb_sandbox_....

Local (stdio): Claude Desktop, Cursor and others

"mcpServers": { "mailbuttons": { "command": "npx", "args": ["-y", "@mailbuttons/mcp-server"], "env": { "MAILBUTTONS_API_KEY": "mb_sandbox_..." } } } }

Configuration

Env var	Default	Description
`MAILBUTTONS_API_URL`	`https://mailbuttons.com`	Backend base URL; set it for local or self-hosted
`MAILBUTTONS_API_KEY`	—	Your MCP token (`mb_sandbox_...` or `mb_production_...`)

The token is read from the environment only — never hard-code it.

Development

npm run build   # tsc -> dist/

npm run lint # tsc --noEmit npm test # build + vitest (includes the version-alignment check)

Releases: bump the version in package.json, server.json (both places), src/server.ts and skill/SKILL.md together; npm test fails if they drift. Then npm publish, then mcp-publisher publish from this directory. See docs/mcp-publishing.md in the monorepo.

Licence

MIT. Mailbuttons is a trading name of Code Cutter Limited (UK).

Mailbuttons

概览

PopNx MCP 的三大支柱

它能帮你做什么

安装

安装之前

或者在你的电脑上运行

或者在你的电脑上运行

或者在你的电脑上运行

或者在你的电脑上运行

需要你填写的值

它能做什么

基础检查i

作者与仓库一致

仍在维护

有许可证

端点有响应

使用 OAuth 登录

工具描述中没有隐藏指令

与“聊天与邮件”中的其他服务器比较i

常见问题

替代选择

Vexa

emailmd

MCP WhatsApp Cloud

作者的 README

@mailbuttons/mcp-server

Governance model

Tools

Build-time tools (this package only)

Get a token (free, about a minute)

2. Exchange the code for an mbk_ API key

3. Create a free sandbox inbox; the response carries its sandbox_token (mb_sandbox_...)

Connect

Remote (recommended): Claude Code

Local (stdio): Claude Desktop, Cursor and others

Configuration

Development

Licence