Webhook Response 503 Service Unavailable

[moiashvin]

Hi, I have created a custom application and installed it on the store.

Installation is OK, authentication is OK. From the shopify admin, clicking on the app is OK as well. 

Problem is all the webhook response (that I see in Shopify Partner dashboard) on the Webhook Metrics... are all 503 Service Unavailable with 100% failure rate.

Anyone can help? 

[DigitalArtisans]

Hello @moiashvin !

The error is more like a general server error rather than with the app. To clarify, the 503 error occurs mainly due to an unresponsive backend server. It simply indicates that the server somewhere in the chain is down or unreachable for whatever reason.

Hope this helps!

Thanks,
Digital Artisans

[moiashvin]

Thank you @DigitalArtisans. Indeed, that's what the documentation says as well. I just don't know what should I do given that it happen for past days, I tried uninstall, re-install, change webhook url, etc... with same outcome. Using same via a browser, all works in the application.  Any idea what should I do to get over this? 

[moiashvin · Accepted solution]

OK - just to keep community informed, I have solved the issue.

Shopify actually checks the HTTPS certificate before posting the webhook.

In my case, while the HTTPS was showing correctly in browser, the chain certificate wasn't correctly.

I detected it via https://www.sslshopper.com/ssl-checker.html and once I sort it, webhook was working fine.

[Achraf_K]

Hi, check your webhooks here Webhook.site befor use it in your app.