Building a Custom MCP Server

SDK walkthrough — expose any tool or data source to Claude by writing your own MCP server.

What You Will Learn

• MCP SDK setup: Python (mcp) or TypeScript (@modelcontextprotocol/sdk)
• Defining a tool: name, description, inputSchema (JSON Schema)
• Handling a tool call: implement the tool handler function
• Resources: exposing read-only data sources alongside tools
• Running and testing your server with Claude Code or Claude Desktop