To monitor your current amount of credits in Vapi, you'll need to use the Vapi API to regularly check your credit balance. Although there's no direct endpoint mentioned for retrieving credit balances, you can manage and monitor your credits through the billing page available at [this link](
https://dashboard.vapi.ai/org/billing/credits). This page provides options to view your balance and manage alerts.
To automate alerts when credits fall below a certain amount, you might consider setting up a script to fetch and check your credit balance periodically from the billing page data. Let me know if you need more help with setting this up.