Service Unavailable 503
Reference guide
Request path
- You (reached)
- DNS (reached)
- Cloudflare edge (reached)
- Origin (answered with a warning)
503
Likely cause
The origin/application is temporarily unable to handle requests — overloaded, in maintenance, or a dependency is down.
What to do
- Check. Check your hosting platform's status/resource dashboard for CPU, memory, or connection-pool exhaustion, and confirm the application isn't intentionally in maintenance mode.
- Fix. Scale resources or fix the exhausted dependency causing overload, or disable maintenance mode if the site should be live.
- Verify. Retry the request and confirm the application responds normally.