Recently at SerpApi, we've updated our Google Search API portfolio with a new API that helps to retrieve an extended amount (pretty much unlimited) of related questions results.

  1. Use SerpApi's Google Search API to search for something, we use why my cat licks me as example 😊. Try it yourself - Playground
  2. For the initial search, Google usually only returns 4 questions. You may already know this, when you expand any of the questions, Google will add more questions to the page, usually its add 2-3 questions each time you expand.
Google Search Playground in SerpApi

3. Inside each related_questions results, our API includes a serpapi_link. A request to it will return more related_questions results

{
   ...
   "related_questions":[
      {
         "question":"How do I know my cat loves me?",
         <...omitted for simplicity...>
         "serpapi_link":"https://serpapi.com/search.json?device=desktop&engine=google_related_questions&google_domain=google.com&next_page_token=eyJvbnMiOiI2MjAiLCJmYyI6IkVxRUJDbUpCUVhSV2JHSkJkbXR4VEVaRGNYVXRWSGQ1TmpsV2RrdFJObWxsWTA5UmFGZFhkM0pTYkZCNE4yOTBkV1JzU1VKUGJsSmZRMUJUTkVWWVpsSlViMVJtVWxCdmJrWndVRzlQYUVsME9IUTVhWHBoV1doWkxXazJWazE1TXprMlIyUkZaeElYVXpkVVIxbDBZbk5GTkVjMGNYUnpVSGwxYlRFNFFXY2FJa0ZFVlhsRlIyTnRUbmRKTlhCSlNUSllSRGRIVVZCbmFGcEVVMnRJVXpCTlNXYyIsImZjdiI6IjMiLCJlaSI6IlM3VEdZdGJzRTRHNHF0c1B5dW0xOEFnIiwicWMiOiJDZzkzYUhrZ1kyRjBJR3hwWTJzZ2JXVVFBSDFVNUI4XyIsInF1ZXN0aW9uIjoiSG93IGRvIEkga25vdyBteSBjYXQgbG92ZXMgbWU%2FIiwibGsiOiJHaDFvYjNjZ1pHOGdhU0JyYm05M0lHMTVJR05oZENCc2IzWmxjeUJ0WlEiLCJicyI6ImMtTlM1WklMejZoVVNNbFhTRTRzS1ZiSXlVek9WaWpKU00wc1VzZ3Z6MHN0S3JhWFdLNnZ3Y2lseUNVVG5KRmZtcE9pNEttUWsxcWlrRnNKVWc5Um5wdHFMekd6aEV1TFN4VmlVbW94bWpUSXdEeUZwTXlTVkxEYV9leGNLbHp5NkdyVFVfTktjaW9SSmo1dzRWTG1rdlBJTHdlNXpWTWhPd19JZ2htYlh3YlNCMVRVNWNHbHlxWGdXUXdXTGs3TXlTeExWTWhJTE1wTks4MVJLTWxYeUNqTlRjd0RlbUZ4aGdBakFBIn0%3D"
      },
      {
         "question":"Is cat saliva harmful to humans?",
         <...omitted for simplicity...>
         "serpapi_link":"https://serpapi.com/search.json?device=desktop&engine=google_related_questions&google_domain=google.com&next_page_token=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"
      }
   ]
}
Sample response from the first item in related_questions

You can achieve the same thing while in the playground. Click on the "Google Search" button on top of the page and choose "Related Questions".

Copy the next_page_token under any one of the related_questions from our initial Google Search results and paste into the next_page_token input in Google Related Questions playground. Below is the same results in Playground 💕. Try it yourself  - Playground

Google Related Questions Playground in SerpApi

4. Here is the important part, you can notice that the result above has the same serpapi_link. A request to it again will give you more results to related_questions. You can do this again and again as long as Google is responding with results.

That's it. Very simple workflow and you are able to retrieve more "People also ask" results from Google. Hope you find this useful 🙂

References