Bookmark-let to summarize a web page using GPT-3 - written by GPT-3

bookmarklet.js

javascript: (function () {
  var text = document.body.innerText;
  var spl = text.split(" ");
  if (spl.length > 3000) {
    text = spl.slice(0, 3000).join(" ");
  }

  fetch('https://api.openai.com/v1/completions', {
    method: 'POST',
    headers: {
      'Content-Type': 'application/json',
      'Authorization': 'Bearer sk-xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx'
    },
    body: JSON.stringify({
      "model": "text-davinci-003",
      "prompt": "Summarize this page " + text,
      "temperature": 0.7,
      "max_tokens": 500,
      "top_p": 1,
      "frequency_penalty": 0,
      "presence_penalty": 0
    })
  }).then(res => res.json()).then(data => {
    const summary = data.choices[0].text;
    const banner = document.createElement('div');
    banner.style.position = 'fixed';
    banner.style.left = '0';
    banner.style.right = '0';
    banner.style.top = '0';
    banner.style.zIndex = 999999999;
    banner.style.background = '#000';
    banner.style.color = '#fff';
    banner.style.padding = '15px';
    banner.innerHTML = summary;
    document.body.appendChild(banner);
  });
})();


// Or use the minified version
javascript:(function(){var text=document.body.innerText;var spl=text.split(" ");if (spl.length > 3000) {text=spl.slice(0,3000).join(" ");}  fetch('https://api.openai.com/v1/completions',{method:'POST',headers:{'Content-Type':'application/json','Authorization':'Bearer sk-xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx'},body:JSON.stringify({"model":"text-davinci-003","prompt":"Summarize this page " + text,"temperature":0.7,"max_tokens":500,"top_p":1,"frequency_penalty":0,"presence_penalty":0})}).then(res => res.json()).then(data => {const summary=data.choices[0].text;const banner=document.createElement('div');banner.style.position='fixed';banner.style.left='0';banner.style.right='0';banner.style.top='0';banner.style.zIndex=999999999;banner.style.background='#000';banner.style.color='#fff';banner.style.padding='15px';banner.innerHTML=summary;document.body.appendChild(banner);});})();

Log in to https://beta.openai.com/
Generate an API key here: https://beta.openai.com/account/api-keys
Replace sk-xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx with your API key
Copy script into a new bookmark URL box.
Visit a page and click the bookmark for a brief summary of that page.

Possibilities for other things are endless.