用网页搜索 API 进行新闻监控：每日查询，只取新报道

// Run once a day (cron, a scheduler or an n8n Schedule trigger). Node.js 18+ (built-in fetch).
import fs from 'node:fs';

const API = 'https://llmwebsearch.com/api/v1/search';
const KEY = process.env.LLMWEBSEARCH_API_KEY;
const SEEN_FILE = './seen-urls.json';
const QUERIES = ['example corp product recall', 'example corp acquisition', 'example industry regulation'];

const seen = new Set(fs.existsSync(SEEN_FILE) ? JSON.parse(fs.readFileSync(SEEN_FILE, 'utf8')) : []);
const fresh = [];

for (const q of QUERIES) {
  const res = await fetch(API, {
    method: 'POST',
    headers: { Authorization: `Bearer ${KEY}`, 'Content-Type': 'application/json' },
    body: JSON.stringify({ q, topic: 'news', time_range: 'day', max_results: 10, read: 3, max_chars: 3000 }),
  });
  if (!res.ok) {
    console.error(q, res.status, await res.text());
    continue;
  }
  const { results } = await res.json();
  for (const r of results) {
    if (seen.has(r.url)) continue; // the same story found by two queries is reported once
    seen.add(r.url);
    fresh.push({ query: q, title: r.title, url: r.url, published_at: r.published_at, text: r.content });
  }
}

fs.writeFileSync(SEEN_FILE, JSON.stringify([...seen]));
for (const item of fresh) console.log(`${item.published_at ?? 'n/d'}  ${item.title}\n  ${item.url}`);