MCP token keeps expiring

We recently added the Zephyr custom MCP connector to Claude, and it works, but the token keeps expiring after around 30 minutes. I keep having to disconnect and then reconnect the connector so Claude is able to reach the API again.

Is there a config that my Claude admin needs to do when adding the connector? 
Why does the token expire at all? Other connectors we use doesn't seem to expire. Let alone expire after just 30 minutes.