Your Sandbox Wallet is a virtual bank account where you deposit funds and pay for APIs with wallet charges. To give you the most accurate picture of your available funds, Console displays the Effective Balance. The Closing Balance is also available through your Wallet Statement for full transparency.
The Closing Balance is the actual amount in your wallet’s virtual bank account, just like the closing balance in a regular bank statement. You can view it anytime via the Wallet Statement. 💡 Learn how to download wallet statement
The Effective Balance is what we display on Console. It represents the amount you can actually use for API calls: Closing Balance – Unbilled Charges = Effective Balance
Why?
Instead of debiting your wallet for each API call, Sandbox aggregates your wallet charges daily.
These daily charges are stored as Unbilled Charges.
Each night, we debit these charges from your closing balance in a single transaction.
This ensures you always see the true balance available for API usage.
By showing the Effective Balance (and not just Closing Balance), you get a realistic view of what’s actually available. This helps you:
Avoid surprises where your wallet “looks funded” but is already committed to pending charges.
Keep API access uninterrupted, since you can top up your wallet before unbilled charges push your balance into negative territory.
💡 In other words, Effective Balance protects you from unexpected pauses by keeping your view in sync with actual API usage.
Closing Balance: Actual wallet funds (available in Wallet Statement).
Effective Balance: Displayed on Console; Closing Balance minus Unbilled Charges.
Unbilled Charges: Daily wallet charges stored and debited nightly.