MCP ships on Free. The CLI runs a local server: project list, stack status, Doctor, logs, start/stop. No MacFullStack cloud account is required — the agent talks to your Mac, not to us.
macstack mcp and Cursor settings: /help/mcp-cursor.
Pro does not “unlock MCP”. It unlocks more projects and services that same agent can already see. Install Free and wire Cursor first; buy a license when one PHP slot is no longer enough — pricing.