A 502 Bad Gateway error generally means that one of Onshape’s servers is having trouble communicating with another, but it can sometimes be triggered by a local connection issue.
Based on current checks for January 7, 2026, there are no major official outages reported yet, but user reports of instability occasionally spike before the official status page updates.
Here is the step-by-step guide to fixing this:
1. The “Is it Just Me?” Check
Before you clear your cache or restart everything, check if the problem is on Onshape’s end.
Check the Official Status: Go to status.onshape.com.
If you see Red/Yellow: The issue is on their side. You just have to wait.
If you see “All Systems Operational”: The issue is likely on your end (or a very new localized outage).
2. The Quickest Fixes (Try these first)
Hard Refresh: Press
Ctrl + F5(Windows) orCmd + Shift + R(Mac) while on the error page. This forces the browser to ignore the cache and reload the page from the server.Incognito Mode: Open a new Incognito/Private window and try to log in to Onshape.
If it works here: You likely have a bad browser extension or corrupted cache. Clear your browser cache and cookies.
3. Use the Onshape Connection Tool
Onshape has a hidden diagnostic tool that checks if your network can talk to their servers correctly.
Look for any red X marks.
Websockets: If “Websockets” fails, your school/work firewall is likely blocking the connection.
Region: If a specific region fails, it might be a temporary routing issue.
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4. Advanced Troubleshooting
If the status page is green but you still get a 502:
Switch Networks: If you are on school or office Wi-Fi, try tethering to your mobile hotspot briefly. If Onshape loads, your main network is blocking it.
Flush DNS:
Windows: Open Command Prompt -> Type
ipconfig /flushdns-> Enter.Mac: Open Terminal -> Type
sudo killall -HUP mDNSResponder-> Enter.
Disable VPN: If you are using a VPN, turn it off. Onshape’s security systems sometimes block VPN IP addresses, resulting in gateway errors.
Summary:
If cad.onshape.com/check is all green and you still get a 502, it is almost certainly a temporary glitch on Onshape’s servers that hasn’t been reported yet. Wait 15 minutes and try again.
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