title: API Return JSON in Browser but not Works in Postman or using jQuery
body: <p>I'm trying to fetch data from Blockchain API <a href="https://chain.so/api/v2/get_tx_unspent/BTCTEST/mx96dAzepcd86VTyo4VshSmizyxAR7sJ6P" rel="nofollow noreferrer">Here</a>, it works only when i access the link using Chrome, but 
  when i using jQuery .getJSON() i got this error message :</p>
  
  <blockquote>
    <p>Access to XMLHttpRequest at '<a href="https://chain.so/api/v2/get_tx_unspent/BTCTEST/mx96dAzepcd86VTyo4VshSmizyxAR7sJ6P" rel="nofollow noreferrer">https://chain.so/api/v2/get_tx_unspent/BTCTEST/mx96dAzepcd86VTyo4VshSmizyxAR7sJ6P</a>' from origin '<a href="http://localhost" rel="nofollow noreferrer">http://localhost</a>' has been blocked by CORS policy: No 'Access-Control-Allow-Origin' header is present on the requested resource.</p>
  </blockquote>
  
  <p>I know this is because CORS, so i tried using CORS Plugin to solve it,but i am getting another error :</p>
  
  <blockquote>
    <p>GET <a href="https://chain.so/api/v2/get_tx_unspent/BTCTEST/mx96dAzepcd86VTyo4VshSmizyxAR7sJ6P" rel="nofollow noreferrer">https://chain.so/api/v2/get_tx_unspent/BTCTEST/mx96dAzepcd86VTyo4VshSmizyxAR7sJ6P</a> 503</p>
  </blockquote>
  
  <p>after that i tried using postmant and i got meessage :</p>
  
  <blockquote>
    <p>Please turn JavaScript on and reload the page.</p>
  </blockquote>
  
  <p>Here is my code</p>
  
  <pre><code>url = 'https://chain.so/api/v2/get_tx_unspent/BTCTEST/mx96dAzepcd86VTyo4VshSmizyxAR7sJ6P'
  $.getJSON(url,function(result){
          console.log(result);
      })
  </code></pre>