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CORS Blocks Your Code—Here's the Real Fix

Your fetch() works in Postman, dies in the browser. CORS is the silent gatekeeper—and it's time to pick the lock properly.

theAIcatchup Apr 10, 2026 3 min read
Red error in browser console: CORS policy blocks fetch to external API

⚡ Key Takeaways

  • CORS is browser-enforced security, not server-side—proxies bypass without hacks. 𝕏
  • Use specific origins and credentials: true for secure cookie handling. 𝕏
  • Proxies in dev/prod shift architecture toward resilient, full-stack patterns. 𝕏
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theAIcatchup

Community-driven. Code-first.

#CORS error #CORS proxy #Node.js cors #cross-origin #fetch blocked #fix CORS #web proxy #web-development

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Originally reported by Dev.to

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