Why Your API Calls Are Being Blocked In The Browser (and How to Fix It in 12 Lines)

The CORS error that kills every developer’s first API integration — and the serverless proxy pattern that solves it permanently. If you’ve ever built something that calls an external API directly from the browser and seen this: TypeError: Failed to fetch Access to fetch at 'https://api.example.com' from origin 'https://yourapp.com' has been blocked by CORS policy This post is for you. I hit this exact wall building a live subscription dashboard on RevenueCat’s Charts API. The API works perfectly