Retrieve your prepaid balance

Your organization's prepaid credit, the one each paid call on OZAV Services is charged to before it runs. Read it to stop before a call is refused with 402 INSUFFICIENT_CREDIT.

billing_mode: postpaid has no balance (balance: null): its calls are billed on the monthly statement (GET /statements). The credit belongs to the organization, so a test key reads the same balance; calls made with a test key are never charged.