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Kintify Fix · api

Kintify Fix: API CORS Error

Kintify Fix answer

Check return access-control-allow-origin with the caller's origin, then handle options preflight and return 204. before rolling back.

Generated using Kintify Fix — production-safe recommendations

CORS errors are a server response problem, not a client problem. The missing piece is usually Access-Control-Allow-Origin (or preflight handling for non-simple.

Check return Access-Control-Allow-Origin with the caller's origin and handle OPTIONS preflight and return 204.

Kintify Fix tool

kintify fix

Kintify Fix steps

  1. 1

    Return `Access-Control-Allow-Origin` with the caller's origin

  2. 2

    Handle OPTIONS preflight and return 204

  3. 3

    Add `Access-Control-Allow-Credentials: true` if needed

Common causes

  • Missing `Access-Control-Allow-Origin` response header
  • Preflight OPTIONS not handled
  • Credentialed request with wildcard origin

Kintify Fix FAQ

What causes API CORS Error?
Missing Access-Control-Allow-Origin response header and Preflight OPTIONS not handled are the most common causes.
How do I fix API CORS Error?
Check return access-control-allow-origin with the caller's origin, then handle options preflight and return 204.