Steam Inventory Down - Here you see what is going on. At the end of october, valve reduced the permissible request rate for inventory lookups (endpoints). This broke all steam market browser addons that heavily interrogated your owned. There are many ways to check if the servers are down for steam. We track the status of steam and all its services. Check if steam is down or having service issues today. Steam status, outage history, and issues. If you're having trouble with steam, the servers may be down.
Here you see what is going on. At the end of october, valve reduced the permissible request rate for inventory lookups (endpoints). This broke all steam market browser addons that heavily interrogated your owned.