mailbox for Cursor

bot.mailbox/mailbox

Physical mail API for AI agents. Send letters, certified mail. Sandbox + live keys via MCP.

client:Cursor transport:streamable-http tools:45

Install mailbox in Cursor

~/.cursor/mcp.json · windows: %USERPROFILE%\.cursor\mcp.json

{
  "mcpServers": {
    "mailbox": {
      "url": "https://mailbox.bot/api/mcp"
    }
  }
}

Use .cursor/mcp.json in a project root instead to scope it to that project. Cursor merges both. Cursor docs