You Do Not Need an MCP Server for Every Mac App - Accessibility APIs as a Universal Interface

You Do Not Need an MCP Server for Every Mac App The Model Context Protocol is great for connecting AI agents to external services. But when it comes to controlling native Mac apps, there is a simpler approach that most people overlook. Instead of building a separate MCP server for Mail, another for Calendar, another for Finder, and another for every other app you want your agent to use - just use the macOS accessibility API. One interface, every app. The MCP Per-App Problem The typical setup for an AI agent that controls Mac apps looks like this: MCP server for browser automation MCP server for file system operations MCP server for email MCP server for calendar Custom MCP server for each additional app Each one needs to be built, configured, maintained, and kept in sync. Managing 10+ MCP servers is genuinely painful. Configuration files, version mismatches, servers that crash silently. The Accessibility API Alternative Every well-built Mac app exposes its UI through the accessibility f