Why can’t my browser x402 client read the PAYMENT-REQUIRED header?
Quick answer: browsers hide non-standard response headers from cross-origin scripts. Send Access-Control-Expose-Headers: PAYMENT-REQUIRED, PAYMENT-R…
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Quick answer: browsers hide non-standard response headers from cross-origin scripts. Send Access-Control-Expose-Headers: PAYMENT-REQUIRED, PAYMENT-R…
CORS Errors Explained: Every Fix, Every Framework (2026 Guide) TL;DR — A CORS error means the browser blocked a cross-origin request because the ser…