Who is popular today has an API that exposes part of the displayed data, you can consure this API by requesting the same page, with additional "Header" for a different response type, As your browser requestes pages with header "Accept-response: text/html" so the browser responds with HTML, you can also request JSON by specifying a Header "Accept-response: application/json", JSON response is compatible with the JSONAPI standard.
Note that not all pages respond to JSON, only some pages, like the following page:
You can request JSON data format using 3 ways, Adding a header, or a format parameter with the request or add ".json" to the end of the URL as follows:
curl -H "Accept: application/json" https://www.whoispopulartoday.com/day
All the following endpoints respond to the 3 ways, use the method which is most suitable for your case.
In case of using ".json" suffix please add "/day" to the end of the URL as the first example did.
The most popular list in a particular day
Returns the top popular people in a particular day
Lists the countries supported by the system, you can use the country code as a parameter for other pages to get results for this particular country.