Mailbuttons (mbag.ai) MCP Server

Name: Mailbuttons (mbag.ai) MCP Server
Author: com.mailbuttons

com.mailbuttons/mcp-server

Repository Registry

What is the Mailbuttons (mbag.ai) MCP server?

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

How to install Mailbuttons (mbag.ai)

Copy-paste configuration for popular MCP clients.

transport: stdio

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

Environment / auth

MAILBUTTONS_API_KEY
required
secret
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.
Authorization
required
secret
Bearer token: a scoped Mailbuttons MCP token, sent as 'Bearer mb_sandbox_...' (or mb_prod_...). Create one in the dashboard, or via POST /api/v1/mcp/sandbox-inboxes.

Claude Desktop

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

{
  "mcpServers": {
    "mcp-server": {
      "command": "npx",
      "args": [
        "-y",
        "@mailbuttons/mcp-server"
      ],
      "env": {
        "MAILBUTTONS_API_KEY": "<YOUR_MAILBUTTONS_API_KEY>",
        "MAILBUTTONS_API_URL": "<YOUR_MAILBUTTONS_API_URL>",
        "Authorization": "<YOUR_AUTHORIZATION>"
      }
    }
  }
}

Cursor

~/.cursor/mcp.json

{
  "mcpServers": {
    "mcp-server": {
      "command": "npx",
      "args": [
        "-y",
        "@mailbuttons/mcp-server"
      ],
      "env": {
        "MAILBUTTONS_API_KEY": "<YOUR_MAILBUTTONS_API_KEY>",
        "MAILBUTTONS_API_URL": "<YOUR_MAILBUTTONS_API_URL>",
        "Authorization": "<YOUR_AUTHORIZATION>"
      }
    }
  }
}

Windsurf

~/.codeium/windsurf/mcp_config.json

{
  "mcpServers": {
    "mcp-server": {
      "command": "npx",
      "args": [
        "-y",
        "@mailbuttons/mcp-server"
      ],
      "env": {
        "MAILBUTTONS_API_KEY": "<YOUR_MAILBUTTONS_API_KEY>",
        "MAILBUTTONS_API_URL": "<YOUR_MAILBUTTONS_API_URL>",
        "Authorization": "<YOUR_AUTHORIZATION>"
      }
    }
  }
}

VS Code

.vscode/mcp.json

{
  "servers": {
    "mcp-server": {
      "type": "stdio",
      "command": "npx",
      "args": [
        "-y",
        "@mailbuttons/mcp-server"
      ],
      "env": {
        "MAILBUTTONS_API_KEY": "<YOUR_MAILBUTTONS_API_KEY>",
        "MAILBUTTONS_API_URL": "<YOUR_MAILBUTTONS_API_URL>",
        "Authorization": "<YOUR_AUTHORIZATION>"
      }
    }
  }
}

Claude Code

claude mcp add mcp-server --env MAILBUTTONS_API_KEY=<YOUR_MAILBUTTONS_API_KEY> --env MAILBUTTONS_API_URL=<YOUR_MAILBUTTONS_API_URL> --env Authorization=<YOUR_AUTHORIZATION> -- npx -y @mailbuttons/mcp-server