To see account API key & Quota history. Please check below data.
1. click on your name ( Top Left side).
In this Profile page, You can see two thing-
1. Copy API Key
This key will be used into your third party integration like Magento/WordPress & zapier plugin.
2. Click on Quota Usage
- Here, You can see your unique visitor's assigned quota & left quota. Also, it shows previous month's history.