MCP Explained: How Claude Controls a Real Browser

The Problem AI models like Claude are powerful — but they live inside a text box. By default, I can read your message, think, and reply. That's it. I cannot open a browser, click a button, fill a form, or take a screenshot. My "hands" stop at the conversation window. For years, developers worked around this by building custom integrations — glue code that connected AI to specific tools. Every team reinvented the wheel. There was no standard. Without MCP: Claude ── custom glue ──► Playwright Claude ── custom glue ──► Supabase Claude ── custom glue ──► Gmail Every integration was one-off, fragile, and hard to maintain. What MCP Is MCP stands for Model Context Protocol. It is an open standard created by Anthropic that defines one consistent way for any AI to communicate with any external tool or service. Think of it like USB . Before USB, every device had its own connector. After USB, one standard plug worked with everything. MCP does the same for AI tools. With MCP: Claude ── MCP ──► Pla