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Mailbuttons (mbag.ai) MCP Server

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answering

Mailbuttons (mbag.ai) is answering right now. Last checked 8 min ago. 37 installs a week from npm. Last commit 15 Jul 2026.

Governed email for AI agents (Mailbuttons / mbag.ai): sandbox inboxes, policy gate, audit log.

Installs per day peak 15 · avg 7 · +100% w/w
a month agotoday
Uptime history 47 days of history
47 days agonow
100.0%
Uptime 24h
92 of 92 checks
Tools
hidden behind auth
227 ms
Response time
average over 24h
37
Installs / week
npm and PyPI

What the code does

We have not read this server's code yet, 21 h ago · rules 3dff92dd89df

Capabilities

What this server is able to do. For an MCP server this is often the job itself — a terminal server runs commands because that is what it is for. Listed so you know what you are plugging in, not as an accusation.

Package points at a different repository mailbuttons/mcp-server
пакет @mailbuttons/mcp-server ссылается на mailbuttons/codecutter-saas

Is this your server and something here is wrong? Tell us — corrections are free and do not require a plan.

This code can reach further than it looks

We found places where it runs commands, builds paths or queries from values it is given. None of that is a flaw by itself — it becomes one when the code changes, and code changes quietly between releases. We re-read it on every one.

Three servers free · no card

Connect this server

Endpoint below is the one we actually reach during checks — not the one copied from a README. Last verified 8 min ago.

run in your terminal
claude mcp add mcp-server --transport http https://mailbuttons.com/api/v1/mcp/rpc
~/Library/Application Support/Claude/claude_desktop_config.json
{
  "mcpServers": {
    "mcp-server": {
      "url": "https://mailbuttons.com/api/v1/mcp/rpc"
    }
  }
}
~/.codex/config.toml
[mcp_servers.mcp-server]
url = "https://mailbuttons.com/api/v1/mcp/rpc"
.cursor/mcp.json
{
  "mcpServers": {
    "mcp-server": {
      "url": "https://mailbuttons.com/api/v1/mcp/rpc"
    }
  }
}
.vscode/mcp.json
{
  "mcpServers": {
    "mcp-server": {
      "url": "https://mailbuttons.com/api/v1/mcp/rpc"
    }
  }
}

This one needs environment variables set before it will start: MAILBUTTONS_API_KEY (A scoped Mailbuttons MCP token (mb_sandbox_...). Sandbox-by-default; external send requires human promotion.), MAILBUTTONS_API_URL (Backend base URL. Defaults to https://mailbuttons.com; set for self-hosted or local.). The author declared them in the registry entry; get the values from the project itself.

This endpoint answered with an authorization challenge. The server is running, but it did not say what kind of credentials it expects.

Endpoints

URLTransportStateLatencyChecked
https://mailbuttons.com/api/v1/mcp/rpc streamable-http needs auth 246 ms 8 min ago

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Mailbuttons (mbag.ai) — questions

Answers built from our own checks of this server.

Why is there no tool list for Mailbuttons (mbag.ai)?
The server answered our handshake with an authorization challenge, so it is running — but it will not describe its tools to an anonymous client. To see them you need to connect with your own credentials. We record it as alive, not as broken: 100.0% of checks in the last 24 hours got a reply.
Is Mailbuttons (mbag.ai) working right now?
We send a real MCP handshake every 15 minutes. Over the last 24 hours 92 of 92 checks got a reply (100.0%), average response time 227 ms. The bar chart above shows every period we have measured.
How do I connect Mailbuttons (mbag.ai)?
Copy the ready config from this page — we generate it for Claude Code, Claude Desktop, Codex, Cursor and VS Code, each with the file path that client actually reads. It is a remote server, so there is nothing to install — the client connects to the address. You will need your own credentials: it refuses anonymous clients.
Does Mailbuttons (mbag.ai) need an API key?
Yes. Every time we knock, Mailbuttons (mbag.ai) answers with an authorization challenge instead of its tool list — that is how we know it is running and gated rather than broken. Bring your own credentials and it will talk.
How fast is Mailbuttons (mbag.ai)?
It answers our handshake in 227 ms on average, which is faster than 61% of all working MCP servers we measure. The comparison comes from our own checks across the whole registry, every 15 minutes.
How many people use Mailbuttons (mbag.ai)?
The npm package @mailbuttons/mcp-server was installed 37 times in the last week. Week over week that is +100%. We show installs rather than GitHub stars on purpose: a star is a bookmark, an install is someone actually running it.
Is Mailbuttons (mbag.ai) open source?
Yes — it is published under the MIT licence, 1 stars on GitHub and 1 open issue. The source link is on this page, so you can read exactly what it does with your data before you connect it.