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The Simkl API supports Cross-Origin Resource Sharing (CORS) on the api.simkl.com domain — you can call it directly from a browser using fetch or XMLHttpRequest. 
const res = await fetch(
  'https://api.simkl.com/tv/17465?client_id=YOUR_CLIENT_ID&app-name=my-app-name&app-version=1.0',
  {
    headers: {
      'Content-Type': 'application/json',
      'User-Agent':   'my-app-name/1.0',
    },
  },
);
Don’t ship client_secret in browser code. If you need authenticated calls from a browser, use the PIN flow (no secret) or proxy calls through your own server.

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