title: Coinbase Pro API for a React client
body: <p>I'm trying to develop a React client which should allow the user to rebalance its portfolio.</p>
  <p>The problem is that I can't authenticate due to a CORS error:</p>
  <pre><code>Access to XMLHttpRequest at 'https://api.exchange.coinbase.com/accounts' from origin 'http://localhost:3000' has been blocked by CORS policy: Request header field cb-access-passphrase is not allowed by Access-Control-Allow-Headers in preflight response.
  </code></pre>
  <p>Maybe this API is not meant to be used from clients?</p>