At my company we have a Python app which exposes rest APIs. I need to periodically check if APIs are functioning and return the correct data in their responses.
So far I managed to configure Stackdriver uptime Checks - to check the statuses, 
But how, for example can I check if response "data" property is not an empty array (empty array is not valid)

```
{data:[]} //not valid - should have at least 1 item

```

Is uptime checks a good tool for it?