What Is MCP?

Software Development with Claude Code

Dani Zysman

AI Curriculum Manager @ DataCamp

The Limitation

recraft: half: Claude looking confused at locked database and API icons, unable to connect

  • Claude Code can:
    • Read your files
    • Run commands
    • Execute code
  • Claude Code cannot directly access:
    • Databases
    • External APIs
    • Cloud services
Software Development with Claude Code

MCP: The Translator

recraft: half: MCP server depicted as a friendly translator figure standing between Claude and a database, passing messages between them

  • MCP = Model Context Protocol
  • A standard for connecting AI to external tools
  • MCP servers act as translators
Software Development with Claude Code

The Client-Server Pattern

MCP client-server architecture: Host, Client, and Server

Software Development with Claude Code

What MCP Abstracts

What MCP abstracts: natural language replaces technical complexity

Software Development with Claude Code

How MCP Works

flowchart: You ask Claude, MCP Server translates, Tool executes, Results returned

Software Development with Claude Code

The MCP Ecosystem

The MCP ecosystem: Claude connects to Database servers, Service integrations, and Utilities

Software Development with Claude Code

Why Not Just Use SQL Directly?

  • Without MCP:
    • Copy schema, write SQL, run query
    • Paste results back to Claude
    • Multiple tools, constant switching
  • With MCP:
    • Ask Claude your question
    • Claude handles the rest

 

One conversation, no context switching

Software Development with Claude Code

What's Next

  • This Video: Understand the MCP concept
  • Rest of this Chapter:
    • Connect to the Chinook music database
    • Add a database-powered endpoint to the Music Analytics API
    • Test the endpoint end-to-end
Software Development with Claude Code

Let's Practice!

Software Development with Claude Code

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