Claude Code MCP Explained (and How to Set It Up)

ACCESS the FULL COURSE here: https://academy.zenva.com/product/agentic-ai-coding-mini-degree/?utm_campaign=youtube_description&utm_medium=youtube&utm_content=youtube_2026_claudecodemcpexplainedsetup Claude Code becomes much more useful once you understand how it actually thinks, and how to extend its reach safely. This walkthrough starts with the mental model that makes everything else click: the role of CLAUDE.md as a project constitution, the scratchpad as working memory, and the plan-then-execute workflow that keeps the agent inside the boundaries you set. From there, we look at what the Model Context Protocol (MCP) is and why it matters. MCP gives Claude Code a standardized way to call external tools, file systems, browsers, GitHub, APIs, without inventing parameters or hallucinating results. We cover what tool contracts and JSON schemas actually do under the hood, and why they are the difference between a predictable agent and an unreliable one. The second half of the video is hands-on: setting up the official filesystem MCP server inside Claude Code on Windows and macOS/Linux, registering it with the right transport and scope, and then verifying it from both the terminal and inside a Claude Code session. By the end you have a small project where Claude Code can list directories and read files through real MCP tool calls, the foundation for everything more advanced like GitHub MCP, Playwright MCP, and custom skills that comes next.