What Is MCP? Complete Guide. MCP (Model Context Protocol) is the standard plug for AI agents. Learn what it is, how it works, and how to use it with Claude, Codex and Gemini. Visit our site for more information.

What Is MCP? The AI Universal Plug Standard

MCP (Model Context Protocol) started as an Anthropic spec in late 2024. Eighteen months later, it's the universal standard every serious AI agent speaks — Claude Code, Gemini CLI, Codex, Cursor, Windsurf.

What MCP Does

Instead of every AI model writing custom integrations for every tool, each model speaks MCP once and every tool that speaks it becomes available. Anthropic calls it a USB-C port for AI.

Top 5 MCP Servers

GitHub (repos, PRs, issues), Context7 (current docs), Playwright (browser automation), Filesystem (local file access), Brave Search (web search inside agents).

How to Install

Claude Code: claude mcp add github. Codex: codex mcp add context7 -- npx context7-mcp. Gemini CLI: edit ~/.gemini/settings.json with the same mcpServers block.

Frequently Asked Questions

What is MCP?

MCP (Model Context Protocol) is the universal plug standard for AI agents. It lets any model connect to any tool with a single integration.

Which AI models support MCP?

Claude Code, Codex, Gemini CLI, Cursor and Windsurf all support MCP as of 2026.

How many MCP servers exist?

Over 20,000 servers are on public registries with 97 million monthly SDK downloads.

Is MCP free?

The MCP specification is open. Most servers are free, though some premium tools require paid API keys.