mcp_example_1

claude_desktop_config.json

{
  "mcpServers": {
    "mcp-2ex": {
      "command": "node",
      "args": [
          "/path123/mcp/mcp-2ex/build/index.js"
      ],
      "env": {
        "API_URL": "http://localhost:8787",
        "API_KEY": "123"
      }
    }
  }
}

index.ts

import { McpServer } from "@modelcontextprotocol/sdk/server/mcp.js";
import { StdioServerTransport } from "@modelcontextprotocol/sdk/server/stdio.js";
import { z } from "zod";

const server = new McpServer({
  name: "mcp-2ex",
  version: "1.0.0",
});

server.tool(
  "mcp-2ex-test",
  "与えられた文字列を登録する。",
  {text: z.string().min(1, { message: 'タイトルは必須です' })},
  async ({text}) => {
    try{
      const url = process.env.API_URL;
      const item = {title: text, description:"" }
      const response = await fetch(url + "/api/todos/create" ,
        {
          method: "POST",
          headers: { "Content-Type": "application/json" },
          body: JSON.stringify(item),
        }
      );
      if(response.ok === false){
        throw new Error("Error, response <> OK:");
      }
      const body = await response.text();
      return {content: [{type: "text", text: body}]};
    }catch(e){
      throw new Error("Error, mcp-2ex-test:" + e);
    }
  },
);

async function main() {
  const transport = new StdioServerTransport();
  await server.connect(transport);
  console.error("Example MCP Server running on stdio");
}

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

package.json

{
  "name": "mcp-2ex",
  "version": "1.0.0",
  "main": "index.js",
  "type": "module",
  "bin": {
    "mcp-example": "./build/index.js"
  },
  "scripts": {
    "build": "tsc",
    "test": "echo \"Error: no test specified\" && exit 1"
  },
  "keywords": [],
  "author": "",
  "license": "ISC",
  "description": "",
  "files": [
    "build"
  ], 
  "dependencies": {
    "@modelcontextprotocol/sdk": "^1.9.0",
    "zod": "^3.24.2"
  },
  "devDependencies": {
    "@types/node": "^22.14.0",
    "typescript": "^5.8.3"
  }
}

tsconfig.json

{
  "compilerOptions": {
    "target": "ES2022",
    "module": "Node16",
    "moduleResolution": "Node16",
    "outDir": "./build",
    "rootDir": "./src",
    "strict": true,
    "esModuleInterop": true,
    "skipLibCheck": true,
    "forceConsistentCasingInFileNames": true
  },
  "include": ["src/**/*"],
  "exclude": ["node_modules"]
}