CORS for Magento REST API: Setup, Debugging, and Gotchas
If you’ve ever tried calling a Magento REST API from a separate frontend and hit a browser error that looks vague, annoying, and borderline insulting, that was probably CORS. Magento itself usually isn’t the whole problem. The browser is enforcing the policy, your web server is often the layer that needs fixing, and authentication makes everything more fragile. Here’s the practical version: if your React, Vue, Next.js, or plain JavaScript app lives on https://storefront.example and your Magento API lives on https://shop.example, the browser treats that as cross-origin. Even if both domains are yours. ...