AI Agent MCP Server Development 2026

The MCP protocol has standardized Agent tool development. Writing an MCP server is like writing a simple API—define the tools, expose the interface, and let the Agent discover them automatically.

💡 What You Will Learn

The MCP protocol has standardized Agent tool development. Writing an MCP server is like writing a simple API—define the tools, expose the interface, and let the Agent discover them automatically.

mkdir my-mcp-server
cd my-mcp-server
npm init -y
npm install @modelcontextprotocol/sdk

import { Server } from "@modelcontextprotocol/sdk/server/index.js";
import { StdioServerTransport } from "@modelcontextprotocol/sdk/server/stdio.js";

const server = new Server({
  name: "my-tools",
  version: "1.0.0"
});

server.setRequestHandler(ListToolsRequestSchema, async () => ({
  tools: [{
    name: "get_weather",
    description: "Get city weather",
    inputSchema: {
      type: "object",
      properties: {
        city: { type: "string" }
      }
    }
  }]
}));

server.setRequestHandler(CallToolRequestSchema, async (request) => {
  if (request.params.name === "get_weather") {
    const city = request.params.arguments?.city;
    return {
      content: [{ type: "text", text: `${city}25°C` }]
    };
  }
});

const transport = new StdioServerTransport();
await server.connect(transport);

Agent→ MCP → MCP
              ← / ←

Summary