使用 Node.js 内置 http 模块的createServer()方法创建一个新的HTTP服务器并返回json数据，代码如下：

const http = require('http');

const hostname = '127.0.0.1';
const port = 3000;

const data = [
  { name: '测试1号', index: 0 },
  { name: '测试2号', index: 1 },
  { name: '测试3号', index: 2 },
];

const server = http.createServer((req, res) => {
  const url = req.url;
  const method = req.method
  const path = url.split('?')[0]
  
  if (path === '/api/list' && method === 'GET') {
    try {
      res.writeHead(200, 'OK', {'Content-type': 'application/json'});
      res.end(JSON.stringify(data));
    } catch (error) {
      res.writeHead(500, 'Bad', {'Content-type': 'application/json'});
      res.end('server error');
    }
  } else {
    // 没有定义的路由返回404
    res.writeHead(404, {'ContentType': 'text/plain'});
  }
});

server.listen(port, hostname, () => {
  console.log(`Server running at http://${hostname}:${port}/`);
});

要运行此代码段，请将其另存为 server.js 文件并在你的终端中运行 node server.js
接口地址是 http://127.0.0.1:3000/api/list