Mailbuttons MCP Server: Install & Setup

Install Mailbuttons in Claude Code

Remote URL

Claude Code

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

mcp.json (Claude Desktop, Cursor, VS Code, Windsurf)

{
  "mcpServers": {
    "mailbuttons": {
      "url": "https://mailbuttons.com/api/v1/mcp/rpc"
    }
  }
}

npm

Claude Code

claude mcp add mailbuttons -e MAILBUTTONS_API_KEY=... -- npx -y @mailbuttons/mcp-server

mcp.json (Claude Desktop, Cursor, VS Code, Windsurf)

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

Replace each ... with your own value.

Frequently asked questions

What does the Mailbuttons MCP server do?

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

Is the Mailbuttons MCP server free?

The server is free, but you will likely need an account. The server itself is free, but it connects to a service that needs an account or API key, which may have paid tiers. Check the provider for current pricing.

Does Mailbuttons run locally or remotely?

Local + Remote. Can run locally or be used as a hosted remote server.

How do I add Mailbuttons to Claude Code?

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

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