---
title: "What can cause my metrics to report Uplink connection failures?"
canonical: "https://support.apollographql.com/space/ETKB/655360095/What%20can%20cause%20my%20metrics%20to%20report%20Uplink%20connection%20failures%3F"
format: markdown
---
Apollo Uplink is a hosted service deployed multi-cloud and multi-region, which occasionally is unavailable. For these scenarios, Apollo recommends that users locally cache their last known supergraph schema to improve their app's overall reliability. For more information, reference [this example built by our solutions team](https://github.com/apollosolutions/managed-federation-resiliency).

Blocking traffic from Apollo Uplink's hostname (i.e., `https://uplink.api.apollographql.com/`) via proxy or firewall will also cause connection failures.