API call for user count in Chrome Web Store? [closed]

This is no such API.

You can use Google Analytics inside an extension to track users manually.

If you don't need anything fancy, just a number of installs and users, there is My Extensions extension, it will track those numbers for you.

Copy and paste the snippet below wherever you want in the body of a html document saved with a ".php" extension.

<?php//URL of your extension$url = "https://chrome.google.com/webstore/detail/ddldimidiliclngjipajmjjiakhbcohn";//Get the nb of users$file_string = file_get_contents($url);preg_match('#>([0-9,]*) users</#i', $file_string, $users);$nbusers = str_replace(",", "",$users[1]);echo $nbusers; //Display the number of users?>

You can also do this client-side only (at least on your end) by using a cross-domain tool. This snippet will grab the number of users displayed on the Chrome webstore page for an extension (up-to-date as of April 28, 2018):

var chromeExtensionWebstoreURL = 'https://chrome.google.com/webstore/detail/background-image-for-goog/ehohalpjnnlcmckljdflafjjahdgjpmh';$.getJSON('http://www.whateverorigin.org/get?url=' + encodeURIComponent(chromeExtensionWebstoreURL) + '&callback=?', function(response){    var numUsers = ((""+response.contents.match(/<span class="e-f-ih" title="([\d]*?) users">([\d]*?) users<\/span>/)).split(",")[2]);    console.log(numUsers);});

In the future, Google may change the class name of the user count span, in which case you just need to update the regex appropriately.