HTTP/5xx (Server Error)
524 A Timeout Occurred
Cloudflare-specific: a TCP connection was established but the origin did not reply within 100 seconds.
❓ Why does this happen?
Long-running requests (reports, exports, AI generation) exceed Cloudflare's 100-second proxy read timeout.
✅ How to fix it
Move long tasks to background jobs with polling or webhooks, or stream the response to keep the connection active.
Return or handle 524 in your stack
// Note: 524 is normally generated by Cloudflare, not your app.
// Emitting it yourself is only useful for testing client error handling.
// app/api/resource/route.ts
export function GET() {
return Response.json(
{ error: "A Timeout Occurred", status: 524 },
{
status: 524
}
);
}Live 524 mock endpoint
Point your app, tests, or retry logic at this free public URL to reproduce a real 524 response (CORS enabled, optional ?delay=ms up to 5000).
https://castov.com/api/mock/524524 vs similar status codes
Frequently Asked Questions
What does HTTP Status 524 mean?
Why am I getting a 524 status code?
How do I fix a 524 A Timeout Occurred error?
What is the difference between 524 A Timeout Occurred and 522 Connection Timed Out?
How can I test how my app handles a 524 response?
Other 5xx status codes
Browse the full HTTP status codes directory or troubleshoot terminal errors in the Error Fix Encyclopedia.