mkdir -p my-server/src
cd my-server/
yarn init -y
yarn add @modelcontextprotocol/sdk zod zod-to-json-schema
yarn add -D @types/node typescript
# Here lies the magic
yarn add @la-rebelion/mcp-server

import { Tool, ToolSchema } from "@la-rebelion/mcp-server";

export class EchoTool extends Tool {
  toolSchema: ToolSchema = { 
    name: "echo",
    description: "Echoes the input message",
    schema: { // the schema for the parameters needed by the tool
      type: "object",
      properties: {
        message: { type: "string" },
      },
      required: ["message"],
    },
  };

  /**
   * Your logic here, implement the execute method to define the tool behavior
   * @param input The input message - use the schema to define the input type
   * @returns In the example, we are echoing the message
   */
  async execute(input: any): Promise<any> {
    // This is a simple echo tool demo, nothing fancy, just echoing the message
    return Promise.resolve({
      content: [
        {
          type: "text",
          text: `${input.message}` 
        }
      ]
      });
  }
}

#!/usr/bin/env node
import { MCPServer } from '@la-rebelion/mcp-server'
import { EchoTool } from "./tools/EchoTool.js";

const myServer = new MCPServer('My MCP Server', '1.0.0');

async function main() {
  // Register tools
  myServer.registerTool("echo", EchoTool);
  await myServer.run();
}

main().catch((error) => {
  console.error("Server error:", error);
  process.exit(1);
});

yarn build

yarn start
# or
node build/index.js