Text Summarizer Template

What it does

You choose the length

A slider sets how many key sentences to keep, from one to six.

Time saved, at a glance

Shows how much shorter the summary is, the word count before and after, and the reading time saved.

Key points as a list

Each kept sentence becomes a bullet, ready to copy into an email or a doc.

Saved summaries

Keep the summaries you want on the device, and delete them when you’re done.

Keeps your key private

The browser only talks to your own API route, which checks the text, caches answers and limits each visitor to 10 summaries a minute.

How it works

The API route: it checks the text and length, answers from the cache when it can, and calls Text Summarizer.

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/** POST /api/summarize { text, sentences }: picks the key sentences of a passage. */
export async function POST(request: Request) {
  const body = await request.json().catch(() => null);
  const text = String(body?.text ?? '').trim().slice(0, MAX_CHARS);
  const sentences = Math.min(10, Math.max(1, Math.round(Number(body?.sentences) || 3)));
  if (!text) return fail('Paste some text to summarize');
  if (text.split(/\s+/).length < 20 || (text.match(/[.!?](\s|$)/g) || []).length < 2) {
    return fail('Paste at least a few sentences (20 words or more): there’s nothing to shorten yet');
  }

  const key = `summarize:${sentences}:${text}`;
  const hit = fromCache<Summary>(key, TTL_MS);
  if (hit) return Response.json(hit);

  const blocked = guard(request);
  if (blocked) return blocked;

  return respond(async () => {
    const data = await callApi<Summary>('textsummarizer', { json: { text, sentences } });
    toCache(key, data);
    return data;
  });
}

See the whole file on GitHub →

Deploy it

1. Get a free API key

   The free plan includes 200 credits a month, no card needed. Create your key.

2. Deploy it

   Click Deploy to Vercel. Vercel copies the repo to your GitHub account and asks for APIVERVE_API_KEY: paste your key there.

3. Open your app

   Vercel builds it and gives you a live URL, usually in about a minute. Every push to the repo redeploys it.

Try the Text Summarizer API — the call this template makes

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{
  "status": "ok",
  "error": null,
  "data": {
    "originalWords": 67,
    "summaryWords": 30,
    "percentDifference": 44.78,
    "summary": "Headlines can be used to focus the reader's attention on a particular (or main) part of the article. A news article can include accounts of eyewitnesses to the happening event."
  }
}